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| author | Liu Shixin <[email protected]> | 2021-11-05 13:43:59 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2021-11-06 13:30:41 -0700 |
| commit | af1c31acc85325aec2bcc5941fb7a02e19143503 (patch) | |
| tree | 565f062886ae3d2c64093492c0ecfc094d8f4006 /tools/perf/scripts/python/check-perf-trace.py | |
| parent | 325254899684adf32b95ae59000dec4a6853e930 (diff) | |
mm/vmstat: annotate data race for zone->free_area[order].nr_free
KCSAN reports a data-race on v5.10 which also exists on mainline:
BUG: KCSAN: data-race in extfrag_for_order+0x33/0x2d0
race at unknown origin, with read to 0xffff9ee9bfffab48 of 8 bytes by task 34 on cpu 1:
extfrag_for_order+0x33/0x2d0
kcompactd+0x5f0/0xce0
kthread+0x1f9/0x220
ret_from_fork+0x22/0x30
Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 34 Comm: kcompactd0 Not tainted 5.10.0+ #2
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
Access to zone->free_area[order].nr_free in extfrag_for_order() and
frag_show_print() is lockless. That's intentional and the stats are a
rough estimate anyway. Annotate them with data_race().
[[email protected]: add comments]
Link: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Liu Shixin <[email protected]>
Cc: "Paul E . McKenney" <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/check-perf-trace.py')
0 files changed, 0 insertions, 0 deletions