linux-toradex.git/tools/testing/radix-tree/linux, branch v4.10

redo: radix tree test suite: fix compilation

2016-12-15T19:04:20+00:00

[ This resurrects commit 53855d10f456, which was reverted in
  2b41226b39b6.  It depended on commit d544abd5ff7d ("lib/radix-tree:
  Convert to hotplug state machine") so now it is correct to apply ]

Patch "lib/radix-tree: Convert to hotplug state machine" breaks the test
suite as it adds a call to cpuhp_setup_state_nocalls() which is not
currently emulated in the test suite.  Add it, and delete the emulation
of the old CPU hotplug mechanism.

Link: http://lkml.kernel.org/r/1480369871-5271-36-git-send-email-mawilcox@linuxonhyperv.com
Signed-off-by: Matthew Wilcox 
Tested-by: Kirill A. Shutemov 
Cc: Konstantin Khlebnikov 
Cc: Ross Zwisler 
Cc: Matthew Wilcox 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

radix tree test suite: cache recently freed objects

2016-12-15T00:04:10+00:00

The kmem_cache_alloc implementation simply allocates new memory from
malloc() and calls the ctor, which zeroes out the entire object.  This
means it cannot spot bugs where the object isn't properly reinitialised
before being freed.

Add a small (11 objects) cache before freeing objects back to malloc.
This is enough to let us write a test to catch it, although the memory
allocator is now aware of the structure of the radix tree node, since it
chains free objects through ->private_data (like the percpu cache does).

Link: http://lkml.kernel.org/r/1481667692-14500-2-git-send-email-mawilcox@linuxonhyperv.com
Signed-off-by: Matthew Wilcox 
Cc: Kirill A. Shutemov 
Cc: Konstantin Khlebnikov 
Cc: Ross Zwisler 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

radix tree test suite: add some more functionality

2016-12-15T00:04:10+00:00

IDR needs more functionality from the kernel: kmalloc()/kfree(), and
xchg().

Link: http://lkml.kernel.org/r/1480369871-5271-67-git-send-email-mawilcox@linuxonhyperv.com
Signed-off-by: Matthew Wilcox 
Tested-by: Kirill A. Shutemov 
Cc: Konstantin Khlebnikov 
Cc: Ross Zwisler 
Cc: Matthew Wilcox 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

radix tree test suite: use common find-bit code

2016-12-15T00:04:10+00:00

Remove the old find_next_bit code in favour of linking in the find_bit
code from tools/lib.

Link: http://lkml.kernel.org/r/1480369871-5271-48-git-send-email-mawilcox@linuxonhyperv.com
Signed-off-by: Matthew Wilcox 
Tested-by: Kirill A. Shutemov 
Cc: Konstantin Khlebnikov 
Cc: Ross Zwisler 
Cc: Matthew Wilcox 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

radix tree test suite: benchmark for iterator

2016-12-15T00:04:09+00:00

This adds simple benchmark for iterator similar to one I've used for
commit 78c1d78488a3 ("radix-tree: introduce bit-optimized iterator")

Building with make BENCHMARK=1 set radix tree order to 6, this allows to
get performance comparable to in kernel performance.

Link: http://lkml.kernel.org/r/1480369871-5271-43-git-send-email-mawilcox@linuxonhyperv.com
Signed-off-by: Konstantin Khlebnikov 
Signed-off-by: Matthew Wilcox 
Tested-by: Kirill A. Shutemov 
Cc: Ross Zwisler 
Cc: Matthew Wilcox 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

radix tree test suite: track preempt_count

2016-12-15T00:04:09+00:00

Rather than simply NOP out preempt_enable() and preempt_disable(), keep
track of preempt_count and display it regularly in case either the test
suite or the code under test is forgetting to balance the enables &
disables.  Only found a test-case that was forgetting to re-enable
preemption, but it's a possibility worth checking.

Link: http://lkml.kernel.org/r/1480369871-5271-39-git-send-email-mawilcox@linuxonhyperv.com
Signed-off-by: Matthew Wilcox 
Tested-by: Kirill A. Shutemov 
Cc: Konstantin Khlebnikov 
Cc: Ross Zwisler 
Cc: Matthew Wilcox 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

radix tree test suite: allow GFP_ATOMIC allocations to fail

2016-12-15T00:04:09+00:00

In order to test the preload code, it is necessary to fail GFP_ATOMIC
allocations, which requires defining GFP_KERNEL and GFP_ATOMIC properly.
Remove the obsolete __GFP_WAIT and copy the definitions of the __GFP
flags which are used from the kernel include files.  We also need the
real definition of gfpflags_allow_blocking() to persuade the radix tree
to actually use its preallocated nodes.

Link: http://lkml.kernel.org/r/1480369871-5271-38-git-send-email-mawilcox@linuxonhyperv.com
Signed-off-by: Matthew Wilcox 
Tested-by: Kirill A. Shutemov 
Cc: Konstantin Khlebnikov 
Cc: Ross Zwisler 
Cc: Matthew Wilcox 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

tools: add WARN_ON_ONCE

2016-12-15T00:04:09+00:00

Patch series "Radix tree patches for 4.10", v3.

Mostly these are improvements; the only bug fixes in here relate to
multiorder entries (which are unused in the 4.9 tree).

This patch (of 32):

The radix tree uses its own buggy WARN_ON_ONCE.  Replace it with the
definition from asm-generic/bug.h

Link: http://lkml.kernel.org/r/1480369871-5271-37-git-send-email-mawilcox@linuxonhyperv.com
Signed-off-by: Matthew Wilcox 
Tested-by: Kirill A. Shutemov 
Cc: Konstantin Khlebnikov 
Cc: Ross Zwisler 
Cc: Matthew Wilcox 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Revert "radix tree test suite: fix compilation"

2016-12-09T18:41:42+00:00

This reverts commit 53855d10f4567a0577360b6448d52a863929775b.

It shouldn't have come in yet - it depends on the changes in linux-next
that will come in during the next merge window.  As Matthew Wilcox says,
the test suite is broken with the current state without the revert.

Requested-by: Matthew Wilcox 
Cc: Andrew Morton 
Signed-off-by: Linus Torvalds

radix tree test suite: fix compilation

2016-12-08T01:10:00+00:00

Patch "lib/radix-tree: Convert to hotplug state machine" breaks the test
suite as it adds a call to cpuhp_setup_state_nocalls() which is not
currently emulated in the test suite.  Add it, and delete the emulation
of the old CPU hotplug mechanism.

Link: http://lkml.kernel.org/r/1480369871-5271-36-git-send-email-mawilcox@linuxonhyperv.com
Signed-off-by: Matthew Wilcox 
Tested-by: Kirill A. Shutemov 
Cc: Konstantin Khlebnikov 
Cc: Ross Zwisler 
Cc: Matthew Wilcox 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds