diff options
| author | Ian Rogers <irogers@google.com> | 2025-02-21 22:10:06 -0800 |
|---|---|---|
| committer | Namhyung Kim <namhyung@kernel.org> | 2025-02-24 15:46:33 -0800 |
| commit | d118b08f7eee6d6f44b4c549cf22d6b078e2ed73 (patch) | |
| tree | 0bb4da9c9a1ab2affcabb56383d5296b7298dc84 /tools/lib/api/Makefile | |
| parent | 7e05269ba8e340af255765869c91c1be869d85dc (diff) | |
tools lib api: Add io_dir an allocation free readdir alternative
glibc's opendir allocates a minimum of 32kb, when called recursively
for a directory tree the memory consumption can add up - nearly 300kb
during perf start-up when processing modules. Add a stack allocated
variant of readdir sized a little more than 1kb.
As getdents64 may be missing from libc, add support using syscall. As
the system call number maybe missing, add #defines for those.
Note, an earlier version of this patch had a feature test for
getdents64 but there were problems on certains distros where
getdents64 would be #define renamed to getdents breaking the code. The
syscall use was made uncondtional to work around this. There is
context in:
https://lore.kernel.org/lkml/20231207050433.1426834-1-irogers@google.com/
Signed-off-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20250222061015.303622-2-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Diffstat (limited to 'tools/lib/api/Makefile')
| -rw-r--r-- | tools/lib/api/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/lib/api/Makefile b/tools/lib/api/Makefile index 7f6396087b46..8665c799e0fa 100644 --- a/tools/lib/api/Makefile +++ b/tools/lib/api/Makefile @@ -95,7 +95,7 @@ install_lib: $(LIBFILE) $(call do_install_mkdir,$(libdir_SQ)); \ cp -fpR $(LIBFILE) $(DESTDIR)$(libdir_SQ) -HDRS := cpu.h debug.h io.h +HDRS := cpu.h debug.h io.h io_dir.h FD_HDRS := fd/array.h FS_HDRS := fs/fs.h fs/tracing_path.h INSTALL_HDRS_PFX := $(DESTDIR)$(prefix)/include/api |