Date: 26 Oct 2011 14:34:01 -0000 From: Larry Baird <lab@gta.com> To: freebsd-current@freebsd.org Subject: Re: Panics after AHCI timeouts Message-ID: <20111026143401.31096.qmail@mailgate.gta.com> In-Reply-To: <111926.10138.25387@localhost>
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In article <111926.10138.25387@localhost> you wrote: > On Wed, Oct 26, 2011 at 2:27 AM, Alexander Kabaev <kabaev@gmail.com> wrote: > > I do see timeouts on one of my Samsung ST3750330A disks and they > > definitely do not cause any panics. The weird part in my case is that > > disk then immediately reappears as online and mirror zpool can be > > rebuilt by just onlining the disk with 'zpool online <pool> <disk>' > > command. > > > > It seems to be happening once system has accumulated some uptime. If > > rebooted, it keeps running for a week or two with no issues, but then > > timeouts start to happen more or less reliably every single 24 hours. > > Does it correlate with high disk activity, i.e. with periodic(8)? > > On my machine, I have a feeling that timeouts occur more often > at that point, than normally... and that they also occur when multiple > processes access the disk simultaneously. I have seen a panic once last week under 9 stable. I had multiple virtual boxes running different FreeBSD versions. Each virtual host was building kernels with -j4. The host became very slow and the FreeBSD 9 virtual host paniced. I have not been able to to duplicate the panic. Larry -- ------------------------------------------------------------------------ Larry Baird | http://www.gta.com Global Technology Associates, Inc. | Orlando, FL Email: lab@gta.com | TEL 407-380-0220, FAX 407-380-6080
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