Date: Sun, 15 Oct 2006 13:11:52 -0400 From: Kris Kennaway <kris@obsecurity.org> To: Sergey Zaharchenko <doublef-ctm@yandex.ru> Cc: current@freebsd.org Subject: Re: Processes in "ufs" state (PR kern/104406) Message-ID: <20061015171152.GA68129@xor.obsecurity.org> In-Reply-To: <20061015083511.GA13203@shark.localdomain> References: <20061015083511.GA13203@shark.localdomain>
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--HcAYCG3uE/tztfnV Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun, Oct 15, 2006 at 12:35:11PM +0400, Sergey Zaharchenko wrote: > Hello list! >=20 > I've stumbled across this (probable) bug when doing some > number-crunching. Processes which try to access the filesystem hang at > some point when another process has been gobbling up CPU time for a > sufficiently long time. Interestingly, processes which have already > opened some files before the `hang' can apparently read/write them > without hindrance (iostat shows some disk activity). Interactive > processes run well too. When the number-cruncher is `kill -STOP'ped and > `kill -CONT'ed, everything runs well for another while. It's reliably > and frequently reproducible here both on recent and late August CURRENT, > the kernel is GENERIC, the hardware is basic (no RAID, etc.). >=20 > Could anyone experienced enough try to look into this and/or give advice > for debugging the problem? I have ddb available, but I'm not sure about > where to look. >=20 > http://www.freebsd.org/cgi/query-pr.cgi?pr=3D104406 I'm unable to reproduce so far. Kris --HcAYCG3uE/tztfnV Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (FreeBSD) iD8DBQFFMmvYWry0BWjoQKURAsGzAKChP2oSMoLpDWtP2W5+bexmwBNbdgCg4NzU DZjLqP3XceCCXyG1AeF764M= =Rwfs -----END PGP SIGNATURE----- --HcAYCG3uE/tztfnV--
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