Date: Wed, 31 Oct 2007 18:21:24 +0100 From: Rainer Hurling <rhurlin@gwdg.de> To: Kris Kennaway <kris@FreeBSD.org> Cc: freebsd-stable@freebsd.org, Eugen Grosbein <eugen@kuzbass.ru>, Oleg Derevenetz <oleg@vsi.ru> Subject: Re: kern/104406: [ufs] Processes get stuck in "ufs" state under persistent CPU load Message-ID: <4728B994.6090306@gwdg.de> In-Reply-To: <472843CC.8070604@nw-fva.de> References: <027d01c8125c$73d4db80$c8c55358@delloleg><20071019220501.GL31826@elvis.mu.org> <20071020082724.GA87825@svzserv.kemerovo.su> <008d01c812f5$7aad62d0$eec55358@W2KOOOD> <4719F786.80708@gwdg.de> <47278BFA.90705@FreeBSD.org> <472843CC.8070604@nw-fva.de>
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It looks like that Marek Blaszkowski in his new thread on freebsd-amd64@ http://www.nabble.com/forum/ViewPost.jtp?post=13513077 is describing the same system hangings. He founds some strange behaviour with 'sync' of harddiscs. Perhaps this is a step towards the cause of hangings? Regards, Rainer Rainer Hurling schrieb: > Thanks for your answer. > > Kris Kennaway schrieb: >> Rainer Hurling wrote: >>> Looking into PR kern/104406 it seems, that this describes exactly >>> what I am experiencing on three of my systems over the last weeks. >>> They are running FreeBSD 8.0-CURRENT (known as 7.0-CURRENT not long >>> ago ;-) ). >> >> Actually it sounds nothing like it at all ;) >> >>> On these machines I often observe hangings, sometimes only a few >>> seconds, on other times 20-30 seconds before input/output is back. >>> This seems to happen when more extensive disk usage is needed >>> (portupgrade, buildworld, browsing complicated websites etc.). During >>> the hang even xterm is not responding any more, other (diskless) >>> applications like xclock keep to continue. I have no panics, only UFS >>> (and MSDOSFS) are mounted, no NTFS. About two months ago none of my >>> systems showed these hangings. >> >> Is your system swapping? This is the usual cause of pauses during >> high application (actually memory) load. >> >> Kris > > No, I am working with 2GB RAM, without swapping at all. > > In the meantime I tested the above described behaviour a little more. > The hangings even appeared without using Xorg, only working on consoles > under heavy disk usage (portupgrade etc.). > > Rainer
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