Date: Wed, 17 Jan 2001 10:40:02 -0800 (PST) From: "Justin T. Gibbs" <gibbs@scsiguy.com> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/24401: Advansys SCSI driver crashes random userland progs w/SIGPROF Message-ID: <200101171840.f0HIe2h82619@freefall.freebsd.org>
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The following reply was made to PR kern/24401; it has been noted by GNATS. From: "Justin T. Gibbs" <gibbs@scsiguy.com> To: "Ronald F. Guilmette" <rfg@monkeys.com> Cc: FreeBSD-gnats-submit@FreeBSD.ORG Subject: Re: kern/24401: Advansys SCSI driver crashes random userland progs w/SIGPROF Date: Wed, 17 Jan 2001 11:33:21 -0700 >>... or faulty RAM. Performing disk >>I/O is quite memory intensive (lots of DMA active), so RAM is where I >>would start looking first. > >OK, so why does it fail consistantly with the Advansys controller, and >yet it NEVER seems to fail with an Adaptec controller? Most likely because the Adaptec accesses memory in a different pattern. This type of this happens all the time. >I think that your theory about it being bad RAM is clearly incorrect, but >I'm willing to try additional tests to rule out this possibility entirely. > >What would you suggest? I have memtest-86 here. If I run that for several >hours and it shows now errors, then will you be convinced that there's a >problem with the Advansys controller driver? Memory testors (other than the ones built in hardware) rarely find flaky memory problems. Your best bet is to trace out memory and see if the problem persists. -- Justin To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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