From owner-freebsd-scsi Sun Aug 18 19:45:59 1996 Return-Path: owner-freebsd-scsi Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id TAA08084 for freebsd-scsi-outgoing; Sun, 18 Aug 1996 19:45:59 -0700 (PDT) Received: from who.cdrom.com (who.cdrom.com [204.216.27.3]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id TAA08079 for ; Sun, 18 Aug 1996 19:45:55 -0700 (PDT) Received: from tarpit.thrush.com (rd@tarpit.magicnet.net [206.104.206.254]) by who.cdrom.com (8.7.5/8.6.11) with ESMTP id TAA09616 for ; Sun, 18 Aug 1996 19:45:53 -0700 (PDT) Received: (from rd@localhost) by tarpit.thrush.com (8.7.4/8.7.3) id WAA10451; Sun, 18 Aug 1996 22:44:33 -0400 (EDT) Date: Sun, 18 Aug 1996 22:44:33 -0400 (EDT) From: "R.D. Thrush" Message-Id: <199608190244.WAA10451@tarpit.thrush.com> To: gibbs@freefall.freebsd.org (Justin T. Gibbs) CC: freebsd-scsi@freebsd.org In-reply-to: gibbs@freefall.freebsd.org's message of 18 Aug 96 16:36:01 GMT Subject: Re: scsi-diffs.960815.gz uploaded References: Your message of "Sun, 18 Aug 1996 10:54:52 EDT." <199608181454.KAA25570@tarpit.thrush.com> <199608181636.JAA01036@freefall.freebsd.org> Sender: owner-freebsd-scsi@freebsd.org X-Loop: FreeBSD.org Precedence: bulk >>>>> "gibbs" == Justin T Gibbs writes: >> I tried the diffs and had a system lockup. The following 2 messages >> were on the console: >> >> ahc0: WARNING no command for scb2 (cmdcmplt) >> QOUTCNT == 0 >> ahc0: WARNING no command for scb19 (cmdcmplt) >> QOUTCNT == 0 gibbs> You're using SCB_PAGING right? Try turning it off and see if it happens gibbs> again. I think there is a bug in the SCB_PAGING code and since the new gibbs> code is faster, it probably exacerbated the problem. You should also gibbs> trim down your config file. All of those unattached devices are just gibbs> useless kernel bloat. Thanks, I removed AHC_SCBPAGING_ENABLE from the kernel config and have now processed several GBs of news without the forementioned problem. I think this lends credence to your suspicion of a bug in the SCB_PAGING code... As mentioned in a separate email, the diffs seem to have resulted in lossage of the "sps tps msps" stats as shown by iostat as well vmstat disk stats. comet3:home/rd 516>iostat 2 tty sd0 sd1 sd2 sd3 cpu tin tout sps tps msps sps tps msps sps tps msps sps tps msps us ni sy in id 0 737 0 0 0.0 0 0 0.0 0 0 0.0 0 0 0.0 4 2 9 2 82 0 294 0 0 0.0 0 0 0.0 0 0 0.0 0 0 0.0 1 0 2 0 97 Thanks again for the prompt reply to the previous report.