diff options
| author | Tejun Heo <[email protected]> | 2016-05-25 11:48:25 -0400 |
|---|---|---|
| committer | Tejun Heo <[email protected]> | 2016-05-25 11:48:25 -0400 |
| commit | 4f996e234dad488e5d9ba0858bc1bae12eff82c3 (patch) | |
| tree | 882a932c3883968a9276598fd536ab43413083fd /tools/perf/scripts/python/bin/export-to-postgresql-report | |
| parent | 28165ec7a99be98123aa89540bf2cfc24df19498 (diff) | |
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/bin/export-to-postgresql-report')
0 files changed, 0 insertions, 0 deletions