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| author | Don Brace <don.brace@pmcs.com> | 2015-01-23 23:43:46 +0100 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2015-02-02 18:57:41 +0100 |
| commit | 34f0c6277c686b191936cc321faebd15b28f9ece (patch) | |
| tree | f2ef7d5a9f24993e1b6bd86ac667ae31d3ecb289 /drivers/scsi/hpsa.h | |
| parent | hpsa: optimize cmd_alloc function by remembering last allocation (diff) | |
| download | linux-34f0c6277c686b191936cc321faebd15b28f9ece.tar.xz linux-34f0c6277c686b191936cc321faebd15b28f9ece.zip | |
hpsa: count passthru cmds with atomics, not a spin locked int
Performance enhancement. Remove spin_locks from the driver.
Reviewed-by: Scott Teel <scott.teel@pmcs.com>
Signed-off-by: Don Brace <don.brace@pmcs.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/scsi/hpsa.h')
| -rw-r--r-- | drivers/scsi/hpsa.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/scsi/hpsa.h b/drivers/scsi/hpsa.h index 981479a13935..1856445f883a 100644 --- a/drivers/scsi/hpsa.h +++ b/drivers/scsi/hpsa.h @@ -183,8 +183,7 @@ struct ctlr_info { /* cap concurrent passthrus at some reasonable maximum */ #define HPSA_MAX_CONCURRENT_PASSTHRUS (10) - spinlock_t passthru_count_lock; /* protects passthru_count */ - int passthru_count; + atomic_t passthru_cmds_avail; /* * Performant mode completion buffers |