Date: Tue, 28 Feb 2012 09:05:11 +0100 From: Csillag Tamas <cstamas@digitus.itk.ppke.hu> To: Jan Mikkelsen <janm@transactionware.com> Cc: freebsd-scsi@freebsd.org Subject: Re: mfi timeout issues and patch that seems to work (PERC H800) Message-ID: <20120228080511.GN29886@rivendell> In-Reply-To: <D0CB85E6-0C4B-4BC7-8647-51334B4BF51C@transactionware.com> References: <20120223235932.GB19927@rivendell> <D0CB85E6-0C4B-4BC7-8647-51334B4BF51C@transactionware.com>
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On Sat, Feb 25, 2012 at 12:04:05PM +1100, Jan Mikkelsen wrote: > On 24/02/2012, at 10:59 AM, Csillag Tamas wrote: > > Hi, > >=20 > > I had the same issues with the Perc H800 controller as it is describe= d > > here:=20 > > http://www.freebsd.org/cgi/query-pr.cgi?pr=3Dkern/140416 > > (Just for google I include the error here: > > mfi0: COMMAND 0xffffff80009c4b90 TIMEOUT AFTER 41 SECONDS) > > [ =E2=80=A6 ] > > however getting and compiling the newest kernel did NOT fix it for me= . > > Issuing commands with mfiutils still fixed the hang and everything > > returned to normal. > >=20 > > It seems that intensive read triggers the issue, but if you have writ= e > > concurrently you are fine (mostly). Restarting rsync is ideal for > > triggering this buggy condition. > >=20 > > I tried to poke around in the source code and in the end tweaked the > > patch (seen here before > > http://lists.freebsd.org/pipermail/freebsd-scsi/2011-March/004839.htm= l): > >=20 > > replacing > > (void)sc->mfi_read_fw_status(sc); > > with > > mfi_get_controller_info(sc); > > around line 933 > >=20 > > and after testing it for a day it seems to be solid. > > (The original patch did not help me.) > >=20 > > Can someone expert in the topic can confirm if any of this is correct= ? >=20 > The default value for hw.mfi.msi is 0. I had to set it to 1 in > /boot/loader.conf when using a 9261-8i controller. It might be worth > retesting with that setting and the standard kernel. I am not sure if I will have enough time for this (others starts to work on this machine), but will make a try. Thanks Regards, cstamas --=20 CSILLAG Tamas (cstamas) - http://digitus.itk.ppke.hu/~cstamas
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