Date: Fri, 27 Jan 2006 12:10:13 +0100 From: Henri Hennebert <hlh@restart.be> To: Kris Kennaway <kris@obsecurity.org>, Niki Denev <nike_d@cytexbg.com>, freebsd-stable@freebsd.org Subject: Re: diskio / filesystem related deadlock on SMP 6.0-STABLE machine. Message-ID: <20060127121013.ihvemzvjks0gw8k0@webmail.restart.be> In-Reply-To: <20060126234609.GA26648@xor.obsecurity.org> References: <200601202003.30336.nike_d@cytexbg.com> <43D79F09.7090505@cytexbg.com> <200601261040.49015.nike_d@cytexbg.com> <200601261707.56664.nike_d@cytexbg.com> <20060126161728.GA18234@xor.obsecurity.org> <43D95D2C.8010101@rogers.com> <20060126234422.GA26532@xor.obsecurity.org> <20060126234609.GA26648@xor.obsecurity.org>
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Quoting Kris Kennaway <kris@obsecurity.org>: > On Thu, Jan 26, 2006 at 06:44:22PM -0500, Kris Kennaway wrote: >> On Thu, Jan 26, 2006 at 06:37:16PM -0500, Mike Jakubik wrote: >> > Kris Kennaway wrote: >> > >On Thu, Jan 26, 2006 at 05:07:56PM +0200, Niki Denev wrote: >> > > >> > >>On Thursday 26 January 2006 10:40, Niki Denev wrote: >> > >> >> > >>[...] >> > >> >> > >>After i disabled option QUOTA in both my default kernel config >> > >>and the one i compiled with the debugging options i was unable >> > >>to reproduce the deadlock again. (i hope it stays that way :) ) >> > >>This, together with the report in my previous post probably point >> > >>that the problem is in the QUOTA support. >> > >> >> > > >> > >Actually, I think this is known. >> > > >> > >Kris >> > > >> > >> > Well thats good to know, i was planning on upgrading a production box >> > from 5 to 6, its SMP and uses QUOTA. How did 6 get released when QUOTA >> > was known to cause deadlocks? > > FYI, you can probably work around this by setting debug.mpsafevfs=0. > Of course, you'll lose the filesystem performance benefits. I encounter the same problem (kern/91631) and debug.mpsafevfs=0 don't solve the issue! I have to disable quota in etc/rc.conf.local and /etc/fstab to go around the problem (options QUOTA is still in my kernel config). The system is running for 6 days now and I cross my fingers... I intend to send a follow-up to the PR after 15 days of uptime. Henri > > Kris > ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program.
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