From: James Bottomley Date: Thu, 4 Aug 2005 18:28:40 +0000 (-0500) Subject: [SCSI] fix aic7xxx performance issues since 2.6.12-rc2 X-Git-Tag: v2.6.13-rc6~53^2 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fdd0edf2aca72e374d10e7a0957a006f18bffaf4;p=linux-2.6 [SCSI] fix aic7xxx performance issues since 2.6.12-rc2 Several people noticed we dropped quite a bit on benchmark figures. OK, it was my fault but unfortunately I discovered I ran out of brown paper bags a while ago and forgot to reorder them. The issue is that a construct introduced in the conversion of the driver to use the transport class keyed off whether the block request was tagged or not. However, the aic7xxx driver doesn't properly set up the block layer TCQ (it uses the wrong API), so the driver now things all requests are untagged and we keep it to a queue depth of a single element. Oops. The fix is to use the correct TCQ API. Signed-off-by: James Bottomley --- diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm.c b/drivers/scsi/aic7xxx/aic7xxx_osm.c index d79a2ae899..687f19e9cf 100644 --- a/drivers/scsi/aic7xxx/aic7xxx_osm.c +++ b/drivers/scsi/aic7xxx/aic7xxx_osm.c @@ -1264,14 +1264,12 @@ ahc_platform_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, } switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) { case AHC_DEV_Q_BASIC: - scsi_adjust_queue_depth(sdev, - MSG_SIMPLE_TASK, - dev->openings + dev->active); + scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); + scsi_activate_tcq(sdev, dev->openings + dev->active); break; case AHC_DEV_Q_TAGGED: - scsi_adjust_queue_depth(sdev, - MSG_ORDERED_TASK, - dev->openings + dev->active); + scsi_set_tag_type(sdev, MSG_ORDERED_TAG); + scsi_activate_tcq(sdev, dev->openings + dev->active); break; default: /* @@ -1280,9 +1278,7 @@ ahc_platform_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, * serially on the controller/device. This should * remove some latency. */ - scsi_adjust_queue_depth(sdev, - /*NON-TAGGED*/0, - /*queue depth*/2); + scsi_deactivate_tcq(sdev, 2); break; } }