Date: Wed, 31 Oct 2007 09:58:52 +0100 From: Rainer Hurling <Rainer.Hurling@nw-fva.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: <472843CC.8070604@nw-fva.de> In-Reply-To: <47278BFA.90705@FreeBSD.org> 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>
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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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