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| author | James Smart <jsmart2021@gmail.com> | 2018-09-10 10:30:49 -0700 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-09-11 20:37:33 -0400 |
| commit | 18027a8ccca5b9189f49be0d8b84dbc717084a26 (patch) | |
| tree | aa4dbf9ac409f149884c6df5b1d2a1950f7e427b /drivers/scsi/lpfc/lpfc.h | |
| parent | 2879265f514b1f4154288243c91438ddbedb3ed4 (diff) | |
| download | lwn-18027a8ccca5b9189f49be0d8b84dbc717084a26.tar.gz lwn-18027a8ccca5b9189f49be0d8b84dbc717084a26.zip | |
scsi: lpfc: reduce locking when updating statistics
Currently, on each io completion, the stats update routine indiscriminately
holds a lock. While holding the adapter-wide lock, checks are made to check
whether status are being tracked. When disabled (the default), the locking
wasted a lot of cycles.
Check for stats enablement before taking the lock.
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/lpfc/lpfc.h')
0 files changed, 0 insertions, 0 deletions