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| author | Mike Marciniszyn <[email protected]> | 2019-06-14 16:32:26 +0000 |
|---|---|---|
| committer | Doug Ledford <[email protected]> | 2019-06-18 01:15:40 +0000 |
| commit | cf131a81967583ae737df6383a0893b9fee75b4e (patch) | |
| tree | 8ebb349f62700de5878a2919070031878de90f50 /lib/mpi/mpi-pow.c | |
| parent | IB/hfi1: Correct tid qp rcd to match verbs context (diff) | |
| download | kernel-cf131a81967583ae737df6383a0893b9fee75b4e.tar.gz kernel-cf131a81967583ae737df6383a0893b9fee75b4e.zip | |
IB/hfi1: Avoid hardlockup with flushlist_lock
Heavy contention of the sde flushlist_lock can cause hard lockups at
extreme scale when the flushing logic is under stress.
Mitigate by replacing the item at a time copy to the local list with
an O(1) list_splice_init() and using the high priority work queue to
do the flushes.
Fixes: 7724105686e7 ("IB/hfi1: add driver files")
Cc: <[email protected]>
Reviewed-by: Dennis Dalessandro <[email protected]>
Signed-off-by: Mike Marciniszyn <[email protected]>
Signed-off-by: Dennis Dalessandro <[email protected]>
Signed-off-by: Doug Ledford <[email protected]>
Diffstat (limited to 'lib/mpi/mpi-pow.c')
0 files changed, 0 insertions, 0 deletions