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authorJens Axboe <axboe@kernel.dk>2018-05-11 12:51:11 -0600
committerTejun Heo <tj@kernel.org>2018-05-11 13:10:44 -0700
commite2d1f8a06e8af1e1e4b339f2afb66233aeb16136 (patch)
tree7bb899cc415d1a6434d2df28c41823e91ea1d71f /drivers/ata
parent69278f790b60ec6657b76061357d5d180524c588 (diff)
downloadlinux-e2d1f8a06e8af1e1e4b339f2afb66233aeb16136.tar.bz2
ahci: enable full queue depth of 32
This changes the AHCI queue depth from 31 to 32, as libata now fully supports it. Now regular IO requests can utilize the full tag space of SATA, not just 31. For IOPS constrained workloads, this can result in a ~3% bump in performance. Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/ahci.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h
index 4356ef1d28a8..6712570a8816 100644
--- a/drivers/ata/ahci.h
+++ b/drivers/ata/ahci.h
@@ -384,7 +384,7 @@ extern struct device_attribute *ahci_sdev_attrs[];
*/
#define AHCI_SHT(drv_name) \
ATA_NCQ_SHT(drv_name), \
- .can_queue = AHCI_MAX_CMDS - 1, \
+ .can_queue = AHCI_MAX_CMDS, \
.sg_tablesize = AHCI_MAX_SG, \
.dma_boundary = AHCI_DMA_BOUNDARY, \
.shost_attrs = ahci_shost_attrs, \