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| author | Tejun Heo <[email protected]> | 2016-05-25 15:48:25 +0000 |
|---|---|---|
| committer | Tejun Heo <[email protected]> | 2016-05-25 15:48:25 +0000 |
| commit | 4f996e234dad488e5d9ba0858bc1bae12eff82c3 (patch) | |
| tree | 882a932c3883968a9276598fd536ab43413083fd /tools/perf/scripts/python/compaction-times.py | |
| parent | Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm... (diff) | |
| download | kernel-4f996e234dad488e5d9ba0858bc1bae12eff82c3.tar.gz kernel-4f996e234dad488e5d9ba0858bc1bae12eff82c3.zip | |
percpu: fix synchronization between chunk->map_extend_work and chunk destruction
Atomic allocations can trigger async map extensions which is serviced
by chunk->map_extend_work. pcpu_balance_work which is responsible for
destroying idle chunks wasn't synchronizing properly against
chunk->map_extend_work and may end up freeing the chunk while the work
item is still in flight.
This patch fixes the bug by rolling async map extension operations
into pcpu_balance_work.
Signed-off-by: Tejun Heo <[email protected]>
Reported-and-tested-by: Alexei Starovoitov <[email protected]>
Reported-by: Vlastimil Babka <[email protected]>
Reported-by: Sasha Levin <[email protected]>
Cc: [email protected] # v3.18+
Fixes: 9c824b6a172c ("percpu: make sure chunk->map array has available space")
Diffstat (limited to 'tools/perf/scripts/python/compaction-times.py')
0 files changed, 0 insertions, 0 deletions