Date: Thu, 16 Sep 2010 14:20:46 +0300 From: Alexander Motin <mav@FreeBSD.org> To: Andriy Gapon <avg@icyb.net.ua> Cc: freebsd-fs@FreeBSD.org, a.smith@ukgrid.net Subject: Re: ZFS related kernel panic Message-ID: <4C91FD8E.8080201@FreeBSD.org> In-Reply-To: <4C91FCD9.1000203@icyb.net.ua> References: <20100909140000.5744370gkyqv4eo0@webmail2.ukgrid.net> <20100909182318.11133lqu4q4u1mw4@webmail2.ukgrid.net> <4C89D6A8.1080107@icyb.net.ua> <20100910143900.20382xl5bl6oo9as@webmail2.ukgrid.net> <20100910141127.GA13056@icarus.home.lan> <20100910155510.11831w104qjpyc4g@webmail2.ukgrid.net> <20100910152544.GA14636@icarus.home.lan> <20100910173912.205969tzhjiovf8c@webmail2.ukgrid.net> <4C8A6B26.8050305@icyb.net.ua> <20100910184921.16956kbaskhrsmg4@webmail2.ukgrid.net> <4C8A7B20.7090408@FreeBSD.org> <4C91F845.4010100@FreeBSD.org> <4C91FCD9.1000203@icyb.net.ua>
next in thread | previous in thread | raw e-mail | index | archive | help
Andriy Gapon wrote: > on 16/09/2010 13:58 Alexander Motin said the following: >> Thanks to console access provided, I have found the reason of crash. >> Attached patch should fix it. Patched system successfully runs the >> stress test for 45 minutes now, comparing to crashing in few minutes >> without it. >> >> Also I've found that timeouts reported by the driver are not fatal. >> Affected commands are correctly completing as soon as after detecting >> time out driver freezes new incoming requests to resolve situation, and >> as result, idling the bus. ones. These timeouts I think caused by some >> congestion on SATA interface, that probably caused by port multiplier. >> This panic could be triggered only by such fake timeouts, not the real > > Can the same happen with ahci (in theory)? Yes, but only on AHCI controllers with FIS-based switching support. At this moment there is only one such chip - 6Gbps Marvell 88SE912x. Same patch should apply ahci(4) also. -- Alexander Motin
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4C91FD8E.8080201>