| Message ID | 1303202689.3981.217.camel@sli10-conroe |
|---|---|
| State | Not Applicable |
| Delegated to: | David Miller |
| Headers | show |
Index: linux/drivers/ata/libata-scsi.c =================================================================== --- linux.orig/drivers/ata/libata-scsi.c 2011-04-19 14:54:37.000000000 +0800 +++ linux/drivers/ata/libata-scsi.c 2011-04-19 14:58:54.000000000 +0800 @@ -3424,7 +3424,9 @@ void ata_scsi_scan_host(struct ata_port sdev = __scsi_add_device(ap->scsi_host, channel, id, 0, NULL); if (!IS_ERR(sdev)) { + struct request_queue *q = sdev->request_queue; dev->sdev = sdev; + blk_set_queue_flush_queueable(q, false); scsi_device_put(sdev); } else { dev->sdev = NULL;
Set SATA queue flush non-queueable. Running below test with a AHCI controller and ext4 filesystem, below patch gives around ~5% speedup. sysbench --test fileio --file-test-mode rndrw --num-threads 16 \ --file-total-size 2500MB --max-requests 150000 --max-time 3000 Signed-off-by: Shaohua Li <shaohua.li@intel.com> --- drivers/ata/libata-scsi.c | 2 ++ 1 file changed, 2 insertions(+) -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html