From e2d1f8a06e8af1e1e4b339f2afb66233aeb16136 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Fri, 11 May 2018 12:51:11 -0600 Subject: 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 Signed-off-by: Tejun Heo --- drivers/ata/ahci.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/ata/ahci.h') 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, \ -- cgit v1.2.3