Date: Sat, 15 May 2010 18:18:48 +0200 From: Miroslav Lachman <000.fbsd@quip.cz> To: Pieter de Boer <pieter@os3.nl> Cc: freebsd-stable@freebsd.org, Jeremy Chadwick <freebsd@jdc.parodius.com> Subject: Re: Read / write timeouts on SATA disks connected to ICH9 Message-ID: <4BEEC968.3050704@quip.cz> In-Reply-To: <4BEE9D13.9060702@os3.nl> References: <4BED8B89.6010901@os3.nl> <20100514195346.GA8977@icarus.home.lan> <4BEDBC08.2040002@os3.nl> <20100514224236.GA11680@icarus.home.lan> <4BEE9D13.9060702@os3.nl>
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Pieter de Boer wrote: > Hi there, > >> what kind of disk I/O is going on. If actual I/O is very little, then >> something weird is going on with regards to the number of interrupts >> being seen on IRQ 23. mav@ might have some ideas, otherwise I'd >> recommend rebooting the machine and seeing if the number drops. If so, >> it may be that the OS has some sort of bug where a disk timing out or >> falling off the bus causes interrupt problems. (It's too bad you don't >> have AHCI on this system. It handles stuff like this much more >> elegantly...) > Well, due to a UFS snapshot panic the box was rebooted, and now I only > see around 1500 interrupts per second, while syncing the mirror. I seen high interrupts on 7.x systems after pulling out/in one drive in gmirror [1] even if it was successfully disconnected by gmirror remove + atacontrol detach and reconnected by atacontrol attach + gmirror insert. It was not 100% reproducible, but it seems the bug is still there in 8.x. [1] http://lists.freebsd.org/pipermail/freebsd-stable/2008-October/046003.html Miroslav Lachman
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