Date: Fri, 19 Feb 2010 10:50:36 +0200 From: Alexander Motin <mav@FreeBSD.org> To: Lawrence Stewart <lstewart@freebsd.org> Cc: svn-src-stable@FreeBSD.org, svn-src-all@FreeBSD.org, src-committers@FreeBSD.org, Matthew Jacob <mj@feral.com>, svn-src-stable-8@FreeBSD.org Subject: Re: svn commit: r203889 - in stable/8/sys: cam cam/ata cam/scsi dev/ahci dev/asr dev/ata dev/ciss dev/hptiop dev/hptrr dev/mly dev/mpt dev/ppbus dev/siis dev/trm dev/twa dev/usb/storage Message-ID: <4B7E50DC.3070103@FreeBSD.org> In-Reply-To: <4B7E2B94.3090605@freebsd.org> References: <201002141938.o1EJcRpx065470@svn.freebsd.org> <4B7D4962.8070706@freebsd.org> <4B7D626A.9040301@feral.com> <4B7E2B94.3090605@freebsd.org>
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Lawrence Stewart wrote: > On 02/19/10 02:53, Matthew Jacob wrote: >> Just a total swag here, but reduce the openings via camcontrol to < 32, >> or even < 16 > > Thanks for the suggestion. camcontrol doesn't seem able to futz with the > mpt controller e.g.: > > root@server# camcontrol identify da0 -v > (pass0:mpt0:0:2:0): ATAPI_IDENTIFY. ACB: a1 00 00 00 00 40 00 00 00 00 > 00 00 > (pass0:mpt0:0:2:0): CAM status: CCB request was invalid IDENTIFY is an ATA command. It is not working there now, as mpt on some level translates ATA into SCSI. `camcontrol inquiry da0` and the others probably should work. > However, there does appear to be a relevant sysctl: > > root@server# sysctl dev.mpt.0 > dev.mpt.0.%desc: LSILogic SAS/SATA Adapter > dev.mpt.0.%driver: mpt > dev.mpt.0.%location: slot=3 function=0 > dev.mpt.0.%pnpinfo: vendor=0x1000 device=0x0050 subvendor=0x1000 > subdevice=0x3060 class=0x010000 > dev.mpt.0.%parent: pci2 > dev.mpt.0.debug: 3 > dev.mpt.0.role: 1 > dev.mpt.0.vol_member_wce: NC > dev.mpt.0.vol_queue_depth: 128 > dev.mpt.0.vol_resync_rate: 0 > dev.mpt.0.nonoptimal_volumes: 0 > > Setting dev.mpt.0.vol_queue_depth=32, I can still trigger the > "mpt0: mpt_cam_event: 0x16" messages by doing an svn up on the src tree. > Same if I set depth to 16, so unfortunately it doesn't seem to do help > in this case. I am not sure what this sysctl does, but it is mpt driver own sysctl. It has nothing common with number of tags used by CAM (at least directly). -- Alexander Motin
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