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2025-11-17perf stat: Display metric-only for 0 countersIan Rogers
0 counters may occur in hypervisor settings but metric-only output is always expected. This resolves an issue in the "perf stat STD output linter" test. Signed-off-by: Ian Rogers <irogers@google.com> Tested-by: Thomas Falcon <thomas.falcon@intel.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-11-17tools: ynltool: remove -lmnl from link flagsJakub Kicinski
The libmnl dependency has been removed from libynl back in commit 73395b43819b ("tools: ynl: remove the libmnl dependency") Remove it from the ynltool Makefile. Reviewed-by: Donald Hunter <donald.hunter@gmail.com> Link: https://patch.msgid.link/20251115225508.1000072-1-kuba@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-11-17kselftest/arm64: Cover disabling streaming mode without SVE in fp-ptraceMark Brown
On a system which support SME but not SVE we can now disable streaming mode via ptrace by writing FPSIMD formatted data through NT_ARM_SVE with a VL of 0. Extend fp-ptrace to cover rather than skip these cases, relax the check for SVE writes of FPSIMD format data to not skip if SME is supported and accept 0 as the VL when performing the ptrace write. Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2025-11-17kselftst/arm64: Test NT_ARM_SVE FPSIMD format writes on non-SVE systemsMark Brown
In order to allow exiting streaming mode on systems with SME but not SVE we allow writes of FPSIMD format data via NT_ARM_SVE even when SVE is not supported, add a test case that covers this to sve-ptrace. We do not support reads. Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2025-11-17Merge branch 'for-6.19/cxl-elc-test' into cxl-for-nextDave Jiang
Extended linear cache unit testing support - Standardize CXL auto region size - Add cxl_test CFMWS support for extended linear cache - Add support for acpi extended linear cache
2025-11-17cxl/test: Add support for acpi extended linear cacheDave Jiang
Add the mock wrappers for hmat_get_extended_linear_cache_size() in order to emulate the ACPI helper function for the regions that are mock'd by cxl_test. Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com> Tested-by: Alison Schofield <alison.schofield@intel.com> Reviewed-by: Alison Schofield <alison.schofield@intel.com> Reviewed-by: Fabio M. De Francesco <fabio.m.de.francesco@linux.intel.com> Link: https://patch.msgid.link/20251117144611.903692-4-dave.jiang@intel.com Signed-off-by: Dave Jiang <dave.jiang@intel.com>
2025-11-17cxl/test: Add cxl_test CFMWS support for extended linear cacheDave Jiang
Add a module parameter to allow activation of extended linear cache on the auto region for cxl_test. The current platform implementation for extended linear cache is 1:1 of DRAM and CXL memory. A CFMWS is created with the size of both memory together where DRAM takes the first part of the memory range and CXL covers the second part. The current CXL auto region on cxl_test consists of 2 256M devices that creates a 512M region. The new extended linear cache setup will have 512M DRAM and 512M CXL memory for a total of 1G CFMWS. The hardware decoders must have their starting offset moved to after the DRAM region to handle the CXL regions. [ dj: Fixup commenting style. (Jonathan) ] Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com> Tested-by: Alison Schofield <alison.schofield@intel.com> Reviewed-by: Alison Schofield <alison.schofield@intel.com> Reviewed-by: Fabio M. De Francesco <fabio.m.de.francesco@linux.intel.com> Link: https://patch.msgid.link/20251117144611.903692-3-dave.jiang@intel.com Signed-off-by: Dave Jiang <dave.jiang@intel.com>
2025-11-17cxl/test: Standardize CXL auto region sizeDave Jiang
Create a global define for the size of the mock CXL auto region used in cxl_test. Remove the declared size in mock_init_hdm_decoder() function. Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com> Tested-by: Alison Schofield <alison.schofield@intel.com> Reviewed-by: Alison Schofield <alison.schofield@intel.com> Reviewed-by: Fabio M. De Francesco <fabio.m.de.francesco@linux.intel.com> Link: https://patch.msgid.link/20251117144611.903692-2-dave.jiang@intel.com Signed-off-by: Dave Jiang <dave.jiang@intel.com>
2025-11-17tools: Remove s390 compat supportHeiko Carstens
Remove s390 compat support from everything within tools, since s390 compat support will be removed from the kernel. Reviewed-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Thomas Weißschuh <linux@weissschuh.net> # tools/nolibc selftests/nolibc Reviewed-by: Thomas Weißschuh <linux@weissschuh.net> # selftests/vDSO Acked-by: Alexei Starovoitov <ast@kernel.org> # bpf bits Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2025-11-16perf test: Don't fail if user rdpmc returns 0 when disabledIan Rogers
In certain hypervisor set ups the value 0 may be returned but this is only erroneous if the user rdpmc isn't disabled. Signed-off-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-11-16perf parse-events: Add debug logging to perf_eventIan Rogers
If verbose is enabled and parse_event is called, typically by tests, log failures. Signed-off-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-11-16perf test: Be tolerant of missing json metric none valueIan Rogers
print_metric_only_json and print_metric_end in stat-display.c may create a metric value of "none" which fails validation as isfloat. Add a helper to properly validate metric numeric values. Signed-off-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-11-16perf sample: Fix the wrong format specifierliujing
In the file tools/perf/util/cs-etm.c, queue_nr is of type unsigned int and should be printed with %u. Signed-off-by: liujing <liujing@cmss.chinamobile.com> Reviewed-by: Mike Leach <mike.leach@linaro.org> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-11-16selftests/damon/sysfs: add obsolete_target testSeongJae Park
A new DAMON sysfs file for pin-point target removal, namely obsolete_target, has been added. Add a test for the functionality. It starts DAMON with three monitoring target processes, mark one in the middle as obsolete, commit it, and confirm the internal DAMON status is updated to remove the target in the middle. Link: https://lkml.kernel.org/r/20251023012535.69625-10-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Bijan Tabatabai <bijan311@gmail.com> Cc: David Hildenbrand <david@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Shuah Khan <shuah@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-11-16sysfs.py: extend assert_ctx_committed() for monitoring targetsSeongJae Park
assert_ctx_committed() is not asserting monitoring targets commitment, since all existing callers of the function assume no target changes. Extend it for future usage. Link: https://lkml.kernel.org/r/20251023012535.69625-9-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Bijan Tabatabai <bijan311@gmail.com> Cc: David Hildenbrand <david@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Shuah Khan <shuah@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-11-16drgn_dump_damon_status: dump damon_target->obsoleteSeongJae Park
A new field of damon_target for pin-point target removal, namely obsolete, has newly been added. Extend drgn_dump_damon_status.py to dump it, for easily writing a future DAMON selftests of it. Link: https://lkml.kernel.org/r/20251023012535.69625-8-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Bijan Tabatabai <bijan311@gmail.com> Cc: David Hildenbrand <david@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Shuah Khan <shuah@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-11-16selftests/damon/_damon_sysfs: support obsolete_target fileSeongJae Park
A DAMON sysfs file, namely obsolete_target, has been newly introduced. Add a support of that file to _damon_sysfs.py so that DAMON selftests for the file can be easily written. Link: https://lkml.kernel.org/r/20251023012535.69625-7-sj@kernel.org Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Bijan Tabatabai <bijan311@gmail.com> Cc: David Hildenbrand <david@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Shuah Khan <shuah@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-11-16mm: add ability to take further action in vm_area_descLorenzo Stoakes
Some drivers/filesystems need to perform additional tasks after the VMA is set up. This is typically in the form of pre-population. The forms of pre-population most likely to be performed are a PFN remap or the insertion of normal folios and PFNs into a mixed map. We start by implementing the PFN remap functionality, ensuring that we perform the appropriate actions at the appropriate time - that is setting flags at the point of .mmap_prepare, and performing the actual remap at the point at which the VMA is fully established. This prevents the driver from doing anything too crazy with a VMA at any stage, and we retain complete control over how the mm functionality is applied. Unfortunately callers still do often require some kind of custom action, so we add an optional success/error _hook to allow the caller to do something after the action has succeeded or failed. This is done at the point when the VMA has already been established, so the harm that can be done is limited. The error hook can be used to filter errors if necessary. There may be cases in which the caller absolutely must hold the file rmap lock until the operation is entirely complete. It is an edge case, but certainly the hugetlbfs mmap hook requires it. To accommodate this, we add the hide_from_rmap_until_complete flag to the mmap_action type. In this case, if a new VMA is allocated, we will hold the file rmap lock until the operation is entirely completed (including any success/error hooks). Note that we do not need to update __compat_vma_mmap() to accommodate this flag, as this function will be invoked from an .mmap handler whose VMA is not yet visible, so we implicitly hide it from the rmap. If any error arises on these final actions, we simply unmap the VMA altogether. Also update the stacked filesystem compatibility layer to utilise the action behaviour, and update the VMA tests accordingly. While we're here, rename __compat_vma_mmap_prepare() to __compat_vma_mmap() as we are now performing actions invoked by the mmap_prepare in addition to just the mmap_prepare hook. Link: https://lkml.kernel.org/r/2601199a7b2eaeadfcd8ab6e199c6d1706650c94.1760959442.git.lorenzo.stoakes@oracle.com Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Andreas Larsson <andreas@gaisler.com> Cc: Andrey Konovalov <andreyknvl@gmail.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Baolin Wang <baolin.wang@linux.alibaba.com> Cc: Baoquan He <bhe@redhat.com> Cc: Chatre, Reinette <reinette.chatre@intel.com> Cc: Christian Borntraeger <borntraeger@linux.ibm.com> Cc: Christian Brauner <brauner@kernel.org> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Dave Jiang <dave.jiang@intel.com> Cc: Dave Martin <dave.martin@arm.com> Cc: Dave Young <dyoung@redhat.com> Cc: David Hildenbrand <david@redhat.com> Cc: David S. Miller <davem@davemloft.net> Cc: Dmitriy Vyukov <dvyukov@google.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Guo Ren <guoren@kernel.org> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Hugh Dickins <hughd@google.com> Cc: James Morse <james.morse@arm.com> Cc: Jan Kara <jack@suse.cz> Cc: Jann Horn <jannh@google.com> Cc: Jason Gunthorpe <jgg@nvidia.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Kevin Tian <kevin.tian@intel.com> Cc: Konstantin Komarov <almaz.alexandrovich@paragon-software.com> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Muchun Song <muchun.song@linux.dev> Cc: Nicolas Pitre <nico@fluxnic.net> Cc: Oscar Salvador <osalvador@suse.de> Cc: Pedro Falcato <pfalcato@suse.de> Cc: Robin Murohy <robin.murphy@arm.com> Cc: Sumanth Korikkar <sumanthk@linux.ibm.com> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Sven Schnelle <svens@linux.ibm.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: "Uladzislau Rezki (Sony)" <urezki@gmail.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Vishal Verma <vishal.l.verma@intel.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-11-16tools/mm/page_owner_sort: add help option supportYe Liu
Add -h/--help option to display usage information and improve code style. Link: https://lkml.kernel.org/r/20251016054927.138510-1-ye.liu@linux.dev Signed-off-by: Ye Liu <liuye@kylinos.cn> Cc: SeongJae Park <sj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-11-16tools/mm: use <stdbool.h> in page_owner_sort.cYe Liu
Use standard <stdbool.h> instead of manually defining bool, true and false. Link: https://lkml.kernel.org/r/20251015093851.109663-1-ye.liu@linux.dev Signed-off-by: Ye Liu <liuye@kylinos.cn> Reviewed-by: Dev Jain <dev.jain@arm.com> Reviewed-by: SeongJae Park <sj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-11-16selftests: update ksm inheritance tests for prctl fork/execxu xin
To reproduce the issue mentioned by [1], this add a setting of pages_to_scan and sleep_millisecs at the start of test_prctl_fork_exec(). The main change is just raise the scanning frequency of ksmd. [1] https://lore.kernel.org/all/202510012256278259zrhgATlLA2C510DMD3qI@zte.com.cn/ Link: https://lkml.kernel.org/r/20251007182935207jm31wCIgLpZg5XbXQY64S@zte.com.cn Signed-off-by: xu xin <xu.xin16@zte.com.cn> Cc: David Hildenbrand <david@redhat.com> Cc: Jinjiang Tu <tujinjiang@huawei.com> Cc: Stefan Roesch <shr@devkernel.io> Cc: Wang Yaxin <wang.yaxin@zte.com.cn> Cc: Yang Yang <yang.yang29@zte.com.cn> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-11-16Merge tag 'perf-tools-fixes-for-v6.18-2-2025-11-16' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools Pull perf tools fixes from Arnaldo Carvalho de Melo: - Fix writing bpf_prog (infos|btfs)_cnt to data file, to not generate invalid perf.data files in some corner cases. - Fix 'perf top' segfault by ensuring libbfd is initialized. This is an opt-in feature due to license incompatibilities. - Fix segfault in 'perf lock' due to missing kernel map. - Fix 'perf lock contention' test. - Don't fail fast path detection if binutils-devel isn't available. - Sync KVM's vmx.h with the kernel to pick SEAMCALL exit reason. * tag 'perf-tools-fixes-for-v6.18-2-2025-11-16' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools: perf libbfd: Ensure libbfd is initialized prior to use perf test: Fix lock contention test perf lock: Fix segfault due to missing kernel map tools headers UAPI: Sync KVM's vmx.h with the kernel to pick SEAMCALL exit reason perf build: Don't fail fast path feature detection when binutils-devel is not available perf header: Write bpf_prog (infos|btfs)_cnt to data file
2025-11-16Merge tag 'mm-hotfixes-stable-2025-11-16-10-40' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull misc fixes from Andrew Morton: "7 hotfixes. 5 are cc:stable, 4 are against mm/ All are singletons - please see the respective changelogs for details" * tag 'mm-hotfixes-stable-2025-11-16-10-40' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: mm, swap: fix potential UAF issue for VMA readahead selftests/user_events: fix type cast for write_index packed member in perf_test lib/test_kho: check if KHO is enabled mm/huge_memory: fix folio split check for anon folios in swapcache MAINTAINERS: update David Hildenbrand's email address crash: fix crashkernel resource shrink mm: fix MAX_FOLIO_ORDER on powerpc configs with hugetlb
2025-11-16tools: riscv: Fixed misalignment of CSR related definitionsChen Pei
The file tools/arch/riscv/include/asm/csr.h borrows from arch/riscv/include/asm/csr.h, and subsequent modifications related to CSR should maintain consistency. Signed-off-by: Chen Pei <cp0613@linux.alibaba.com> Link: https://patch.msgid.link/20251114071215.816-1-cp0613@linux.alibaba.com [pjw@kernel.org: dropped Fixes: lines for patches that weren't broken; removed superfluous blank line] Signed-off-by: Paul Walmsley <pjw@kernel.org>
2025-11-15selftests/user_events: fix type cast for write_index packed member in perf_testAnkit Khushwaha
Accessing 'reg.write_index' directly triggers a -Waddress-of-packed-member warning due to potential unaligned pointer access: perf_test.c:239:38: warning: taking address of packed member 'write_index' of class or structure 'user_reg' may result in an unaligned pointer value [-Waddress-of-packed-member] 239 | ASSERT_NE(-1, write(self->data_fd, &reg.write_index, | ^~~~~~~~~~~~~~~ Since write(2) works with any alignment. Casting '&reg.write_index' explicitly to 'void *' to suppress this warning. Link: https://lkml.kernel.org/r/20251106095532.15185-1-ankitkhushwaha.linux@gmail.com Fixes: 42187bdc3ca4 ("selftests/user_events: Add perf self-test for empty arguments events") Signed-off-by: Ankit Khushwaha <ankitkhushwaha.linux@gmail.com> Cc: Beau Belgrave <beaub@linux.microsoft.com> Cc: "Masami Hiramatsu (Google)" <mhiramat@kernel.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: sunliming <sunliming@kylinos.cn> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: Shuah Khan <shuah@kernel.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2025-11-15perf script: Fix build by removing unused evsel_script()James Clark
The evsel_script() function is unused since the linked commit. Fix the build by removing it. Fixes the following compilation error: static inline struct evsel_script *evsel_script(struct evsel *evsel) ^ builtin-script.c:347:36: error: unused function 'evsel_script' [-Werror,-Wunused-function] Fixes: 3622990efaab ("perf script: Change metric format to use json metrics") Signed-off-by: James Clark <james.clark@linaro.org> Reviewed-by: Ian Rogers <irogers@google.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-11-15static_call: allow using STATIC_CALL_TRAMP_STR() from assemblyNaman Jain
STATIC_CALL_TRAMP_STR() could not be used from .S files because static_call_types.h was not safe to include in assembly as it pulled in C types/constructs that are unavailable under __ASSEMBLY__. Make the header assembly-friendly by adding __ASSEMBLY__ checks and providing only the minimal definitions needed for assembly, so that it can be safely included by .S code. This enables emitting the static call trampoline symbol name via STATIC_CALL_TRAMP_STR() directly in assembly sources, to be used with 'call' instruction. Also, move a certain definitions out of __ASSEMBLY__ checks in compiler_types.h to meet the dependencies. No functional change for C compilation. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Naman Jain <namjain@linux.microsoft.com> Signed-off-by: Wei Liu <wei.liu@kernel.org>
2025-11-14selftests/bpf: Test bpf_skb_check_mtu(BPF_MTU_CHK_SEGS) when ↵Martin KaFai Lau
transport_header is not set Add a test to check that bpf_skb_check_mtu(BPF_MTU_CHK_SEGS) is rejected (-EINVAL) if skb->transport_header is not set. The test needs to lower the MTU of the loopback device. Thus, take this opportunity to run the test in a netns by adding "ns_" to the test name. The "serial_" prefix can then be removed. Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> Link: https://lore.kernel.org/r/20251112232331.1566074-2-martin.lau@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-11-14selftests/bpf: Align kfuncs renamed in bpf treeMykyta Yatsenko
bpf_task_work_schedule_resume() and bpf_task_work_schedule_signal() have been renamed in bpf tree to bpf_task_work_schedule_resume_impl() and bpf_task_work_schedule_signal_impl() accordingly. There are few uses of these kfuncs in selftests that are not in bpf tree, so that when we port [1] into bpf-next, those BPF programs will not compile. This patch aligns those remaining callsites with the kfunc renaming. It should go on top of [1] when applying on bpf-next. 1: https://lore.kernel.org/all/20251104-implv2-v3-0-4772b9ae0e06@meta.com/ Signed-off-by: Mykyta Yatsenko <yatsenko@meta.com> Link: https://lore.kernel.org/r/20251105132105.597344-1-mykyta.yatsenko5@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-11-14selftests: drv-net: xdp: make the XDP qstats tests less flakyJakub Kicinski
The XDP qstats tests send 2k packets over a single socket. Looks like when netdev CI is busy running those tests in QEMU occasionally flakes. The target doesn't get to run at all before all 2000 packets are sent. Lower the number of packets to 1000 and reopen the socket every 50 packets, to give RSS a chance to spread the packets to multiple queues. For the netdev CI testing either lowering the count or using multiple sockets is enough, but let's do both for extra resiliency. Acked-by: Stanislav Fomichev <sdf@fomichev.me> Link: https://patch.msgid.link/20251113152703.3819756-1-kuba@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-11-14selftests: drv-net: xdp: Fix register spill error with clang 20Dimitri Daskalakis
On clang 20.1.8 the XDP program fails to load with a register spill error. Since hdr_len is a __u32, the compiler decided it only needed the lower 32-bits of ctx->data, which later triggers the register spill verifier error. Suggested-by: Martin KaFai Lau <martin.lau@kernel.org> Signed-off-by: Dimitri Daskalakis <dimitri.daskalakis1@gmail.com> Link: https://patch.msgid.link/20251113043102.4062150-1-dimitri.daskalakis1@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-11-14ipv6: clean up routes when manually removing address with a lifetimeJakub Kicinski
When an IPv6 address with a finite lifetime (configured with valid_lft and preferred_lft) is manually deleted, the kernel does not clean up the associated prefix route. This results in orphaned routes (marked "proto kernel") remaining in the routing table even after their corresponding address has been deleted. This is particularly problematic on networks using combination of SLAAC and bridges. 1. Machine comes up and performs RA on eth0. 2. User creates a bridge - does an ip -6 addr flush dev eth0; - adds the eth0 under the bridge. 3. SLAAC happens on br0. Even tho the address has "moved" to br0 there will still be a route pointing to eth0, but eth0 is not usable for IP any more. Reviewed-by: David Ahern <dsahern@kernel.org> Reviewed-by: Ido Schimmel <idosch@nvidia.com> Link: https://patch.msgid.link/20251113031700.3736285-1-kuba@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-11-14Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf after 6.18-rc5+Alexei Starovoitov
Cross-merge BPF and other fixes after downstream PR. Minor conflict in kernel/bpf/helpers.c Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-11-14selftests/bpf: Add BTF dedup tests for recursive typedef definitionsPaul Houssel
Add several ./test_progs tests: 1. btf/dedup:recursive typedef ensures that deduplication no longer fails on recursive typedefs. 2. btf/dedup:typedef ensures that typedefs are deduplicated correctly just as they were before this patch. Signed-off-by: Paul Houssel <paul.houssel@orange.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/bpf/9fac2f744089f6090257d4c881914b79f6cd6c6a.1763037045.git.paul.houssel@orange.com
2025-11-14libbpf: Fix BTF dedup to support recursive typedef definitionsPaul Houssel
Handle recursive typedefs in BTF deduplication Pahole fails to encode BTF for some Go projects (e.g. Kubernetes and Podman) due to recursive type definitions that create reference loops not representable in C. These recursive typedefs trigger a failure in the BTF deduplication algorithm. This patch extends btf_dedup_ref_type() to properly handle potential recursion for BTF_KIND_TYPEDEF, similar to how recursion is already handled for BTF_KIND_STRUCT. This allows pahole to successfully generate BTF for Go binaries using recursive types without impacting existing C-based workflows. Suggested-by: Tristan d'Audibert <tristan.daudibert@gmail.com> Co-developed-by: Martin Horth <martin.horth@telecom-sudparis.eu> Co-developed-by: Ouail Derghal <ouail.derghal@imt-atlantique.fr> Co-developed-by: Guilhem Jazeron <guilhem.jazeron@inria.fr> Co-developed-by: Ludovic Paillat <ludovic.paillat@inria.fr> Co-developed-by: Robin Theveniaut <robin.theveniaut@irit.fr> Signed-off-by: Martin Horth <martin.horth@telecom-sudparis.eu> Signed-off-by: Ouail Derghal <ouail.derghal@imt-atlantique.fr> Signed-off-by: Guilhem Jazeron <guilhem.jazeron@inria.fr> Signed-off-by: Ludovic Paillat <ludovic.paillat@inria.fr> Signed-off-by: Robin Theveniaut <robin.theveniaut@irit.fr> Signed-off-by: Paul Houssel <paul.houssel@orange.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/bpf/bf00857b1e06f282aac12f6834de7396a7547ba6.1763037045.git.paul.houssel@orange.com
2025-11-14selftests/bpf: Fix failure paths in send_signal testAlexei Starovoitov
When test_send_signal_kern__open_and_load() fails parent closes the pipe which cases ASSERT_EQ(read(pipe_p2c...)) to fail, but child continues and enters infinite loop, while parent is stuck in wait(NULL). Other error paths have similar issue, so kill the child before waiting on it. The bug was discovered while compiling all of selftests with -O1 instead of -O2 which caused progs/test_send_signal_kern.c to fail to load. Fixes: ab8b7f0cb358 ("tools/bpf: Add self tests for bpf_send_signal_thread()") Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/bpf/20251113171153.2583-1-alexei.starovoitov@gmail.com
2025-11-14Merge tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpfLinus Torvalds
Pull bpf fixes from Alexei Starovoitov: - Fix interaction between livepatch and BPF fexit programs (Song Liu) With Steven and Masami acks. - Fix stack ORC unwind from BPF kprobe_multi (Jiri Olsa) With Steven and Masami acks. - Fix out of bounds access in widen_imprecise_scalars() in the verifier (Eduard Zingerman) - Fix conflicts between MPTCP and BPF sockmap (Jiayuan Chen) - Fix net_sched storage collision with BPF data_meta/data_end (Eric Dumazet) - Add _impl suffix to BPF kfuncs with implicit args to avoid breaking them in bpf-next when KF_IMPLICIT_ARGS is added (Mykyta Yatsenko) * tag 'bpf-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf: selftests/bpf: Test widen_imprecise_scalars() with different stack depth bpf: account for current allocated stack depth in widen_imprecise_scalars() bpf: Add bpf_prog_run_data_pointers() selftests/bpf: Add mptcp test with sockmap mptcp: Fix proto fallback detection with BPF mptcp: Disallow MPTCP subflows from sockmap selftests/bpf: Add stacktrace ips test for raw_tp selftests/bpf: Add stacktrace ips test for kprobe_multi/kretprobe_multi x86/fgraph,bpf: Fix stack ORC unwind from kprobe_multi return probe Revert "perf/x86: Always store regs->ip in perf_callchain_kernel()" bpf: add _impl suffix for bpf_stream_vprintk() kfunc bpf:add _impl suffix for bpf_task_work_schedule* kfuncs selftests/bpf: Add tests for livepatch + bpf trampoline ftrace: bpf: Fix IPMODIFY + DIRECT in modify_ftrace_direct() ftrace: Fix BPF fexit with livepatch
2025-11-14selftests/bpf: Convert glob_match() to bpf arenaAlexei Starovoitov
Increase arena test coverage. Convert glob_match() to bpf arena in two steps: 1. Copy paste lib/glob.c into bpf_arena_strsearch.h Copy paste lib/globtests.c into progs/arena_strsearch.c 2. Add __arena to pointers Add __arg_arena to global functions that accept arena pointers Add cond_break to loops The test also serves as a good example of what's possible with bpf arena and how existing algorithms can be converted. Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20251111032931.21430-1-alexei.starovoitov@gmail.com
2025-11-14selftests/timers/nanosleep: Add tests for return of remaining timeThomas Weißschuh
If interrupted by a signal clock_nanosleep() returns the remaining time into the structure pointed to by the rmtp parameter. So far this functionality was not tested by the timer selftests. Extend the nanosleep selftest to cover this feature. Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://patch.msgid.link/20251106-nanosleep-rtmp-selftest-v1-1-f9212fb295fe@linutronix.de
2025-11-14selftests/timers: Clean up kernel version check in posix_timersWake Liu
Several tests in the posix_timers selftest which test timer behavior related to SIG_IGN fail on kernels older than 6.13. This is due to a refactoring of signal handling in commit caf77435dd8a ("signal: Handle ignored signals in do_sigaction(action != SIG_IGN)"). A previous attempt to fix this by adding a kernel version check to each of the nine affected tests was suboptimal, as it resulted in emitting the same skip message nine times. Following the suggestion from Thomas Gleixner, this is refactored to perform a single version check in main(). To satisfy the kselftest framework's requirement for the test count to match the declared plan, the plan is now conditionally set to 10 (for older kernels) or 19. While setting the plan conditionally may seem complex, it is the better approach to avoid the alternatives: either running tests on unsupported kernels that are known to fail, or emitting a noisy series of nine identical skip messages. A single informational message is now printed instead when the tests are skipped. Signed-off-by: Wake Liu <wakel@google.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/all/20250807085042.1690931-1-wakel@google.com/ Link: https://patch.msgid.link/20251103114502.584940-1-wakel@google.com
2025-11-14selftests/cgroup: conform test to KTAP format outputGuopeng Zhang
Conform the layout, informational and status messages to KTAP. No functional change is intended other than the layout of output messages. Signed-off-by: Guopeng Zhang <zhangguopeng@kylinos.cn> Suggested-by: Sebastian Chlad <sebastian.chlad@suse.com> Acked-by: Michal Koutný <mkoutny@suse.com> Signed-off-by: Tejun Heo <tj@kernel.org>
2025-11-14selftests/bpf: Test widen_imprecise_scalars() with different stack depthEduard Zingerman
A test case for a situation when widen_imprecise_scalars() is called with old->allocated_stack > cur->allocated_stack. Test structure: def widening_stack_size_bug(): r1 = 0 for r6 in 0..1: iterator_with_diff_stack_depth(r1) r1 = 42 def iterator_with_diff_stack_depth(r1): if r1 != 42: use 128 bytes of stack iterator based loop iterator_with_diff_stack_depth() is verified with r1 == 0 first and r1 == 42 next. Causing stack usage of 128 bytes on a first visit and 8 bytes on a second. Such arrangement triggered a KASAN error in widen_imprecise_scalars(). Signed-off-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/r/20251114025730.772723-2-eddyz87@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2025-11-14selftests/futex: Create test for robust listAndré Almeida
Create a test for the robust list mechanism. Test the following uAPI operations: - Creating a robust mutex where the lock waiter is wake by the kernel when the lock owner died - Setting a robust list to the current task - Getting a robust list from the current task - Getting a robust list from another task - Using the list_op_pending field from robust_list_head struct to test robustness when the lock owner dies before completing the locking - Setting a invalid size for syscall argument `len` - Adding multiple elements to a robust list wait waiting for each of them - Creating a circular list and checking that the kernel does not get stuck in an infinity loop Signed-off-by: André Almeida <andrealmeid@igalia.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://patch.msgid.link/20251110224130.3044761-1-andrealmeid@igalia.com
2025-11-14selftests/futex: Skip tests if shmget unsupportedCarlos Llamas
On systems where the shmget() syscall is not supported, tests like anon_page and shared_waitv will fail. Skip these tests in such cases to allow the rest of the test suite to run. Signed-off-by: Carlos Llamas <cmllamas@google.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://patch.msgid.link/20251016162009.3270784-1-cmllamas@google.com
2025-11-14selftests/futex: Add newline to ksft_exit_fail_msg()Carlos Llamas
This was missed in commit e5c04d0f3ea0 ("selftests/futex: Refactor futex_wait with kselftest_harness.h") while replacing previous perror() calls, which automatically append the newline character. Fixes: e5c04d0f3ea0 ("selftests/futex: Refactor futex_wait with kselftest_harness.h") Signed-off-by: Carlos Llamas <cmllamas@google.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://patch.msgid.link/20251015173556.2899646-1-cmllamas@google.com
2025-11-14selftests/futex: Remove unused test_futex_mpol()André Almeida
Commit ed323aeda5e09 ("selftest/futex: Compile also with libnuma < 2.0.16") removed the unused function test_futex_mpol() and commit d35ca2f64272 ("selftests/futex: Refactor futex_numa_mpol with kselftest_harness.h") added it back by accident. Remove it again. Fixes: d35ca2f64272 ("selftests/futex: Refactor futex_numa_mpol with kselftest_harness.h") Signed-off-by: André Almeida <andrealmeid@igalia.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://patch.msgid.link/20251001220438.66227-1-andrealmeid@igalia.com
2025-11-13perf vendor metrics s390: Avoid has_event(INSTRUCTIONS)Ian Rogers
The instructions event is now provided in json meaning the has_event test always succeeds. Switch to using non-legacy event names in the affected metrics. Reported-by: Thomas Richter <tmricht@linux.ibm.com> Closes: https://lore.kernel.org/linux-perf-users/3e80f453-f015-4f4f-93d3-8df6bb6b3c95@linux.ibm.com/ Fixes: 0012e0fa221b ("perf jevents: Add legacy-hardware and legacy-cache json") Signed-off-by: Ian Rogers <irogers@google.com> Reviewed-by: Thomas Richter <tmricht@linux.ibm.com> Tested-by: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-11-13perf auxtrace: Remove errno.h from auxtrace.h and fix transitive dependenciesIan Rogers
errno.h isn't used in auxtrace.h so remove it and fix build failures caused by transitive dependencies through auxtrace.h on errno.h. Signed-off-by: Ian Rogers <irogers@google.com> Reviewed-by: James Clark <james.clark@linaro.org> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-11-13perf build: Remove NO_AUXTRACE build optionIan Rogers
The NO_AUXTRACE build option was used when the __get_cpuid feature test failed or if it was provided on the command line. The option no longer avoids a dependency on a library and so having the option is just adding complexity to the code base. Remove the option CONFIG_AUXTRACE from Build files and HAVE_AUXTRACE_SUPPORT by assuming it is always defined. Signed-off-by: Ian Rogers <irogers@google.com> Reviewed-by: James Clark <james.clark@linaro.org> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-11-13tool build: Remove __get_cpuid feature testIan Rogers
This feature test is no longer used so remove. The function tested by the feature test is used in: tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c however, the Makefile just assumes the presence of the function and doesn't perform a build feature test for it. Signed-off-by: Ian Rogers <irogers@google.com> Reviewed-by: James Clark <james.clark@linaro.org> Signed-off-by: Namhyung Kim <namhyung@kernel.org>
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