Date: Fri, 1 Apr 2005 11:11:18 -0600 From: Karl Denninger <karl@denninger.net> To: "Matthew N. Dodd" <mdodd@freebsd.org> Cc: freebsd-stable@freebsd.org Subject: Re: DANGER WILL ROBINSON! SERIOUS problem with current5.4-PRERELEASE - UPDATE (real this time) #2 Message-ID: <20050401111118.A25432@denninger.net> In-Reply-To: <20050331120100.P328@sasami.jurai.net>; from Matthew N. Dodd on Thu, Mar 31, 2005 at 12:02:20PM -0500 References: <20050329200841.A772@denninger.net> <20050329233843.L328@sasami.jurai.net> <20050329234318.A3883@denninger.net> <20050330230046.A68235@denninger.net> <20050331120100.P328@sasami.jurai.net>
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On Thu, Mar 31, 2005 at 12:02:20PM -0500, Matthew N. Dodd wrote:
> On Wed, 30 Mar 2005, Karl Denninger wrote:
> > Removing the FIRST delta, which is:
> >
> > 218a219,221
> > if (!dumping)
> > callout_reset(&request->callout, request->timeout * hz,
> > (timeout_t*)ata_timeout, request);
> >
> > appears to get rid of the crashes while not harming data integrity OR the
> > reqeueing.
>
> I'd be interested to know if the attached patch does anything.
>
> --
> 10 40 80 C0 00 FF FF FF FF C0 00 00 00 00 10 AA AA 03 00 00 00 08 00
> Index: ata-queue.c
> ===================================================================
> RCS file: /home/ncvs/src/sys/dev/ata/ata-queue.c,v
> retrieving revision 1.32.2.6
> diff -u -u -r1.32.2.6 ata-queue.c
> --- ata-queue.c 23 Mar 2005 04:50:26 -0000 1.32.2.6
> +++ ata-queue.c 31 Mar 2005 17:00:46 -0000
> @@ -217,8 +217,7 @@
> }
> else {
> if (!dumping)
> - callout_reset(&request->callout, request->timeout * hz,
> - (timeout_t*)ata_timeout, request);
> + callout_drain(&request->callout);
> if (request->bio && !(request->flags & ATA_R_TIMEOUT)) {
> ATA_DEBUG_RQ(request, "finish bio_taskqueue");
> bio_taskqueue(request->bio, (bio_task_t *)ata_completed, request);
>
Removing the first delta has allowed the system to survive for over 24
hours, albiet while taking retryable errors.
I have not yet attmepted this patch - but will now that I know that the
system is stable with the first delta OUT.
At minimum Matt that first delta has to come out to avoid the "pukes and
chokes" - whether the above is recommended (by me anyway) I can't say yet -
more as I know it.
--
--
Karl Denninger (karl@denninger.net) Internet Consultant & Kids Rights Activist
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