Date: Wed, 19 Jul 2006 11:23:21 -0300 (ADT) From: User Freebsd <freebsd@hub.org> To: Robert Watson <rwatson@FreeBSD.org> Cc: Kostik Belousov <kostikbel@gmail.com>, freebsd-stable@freebsd.org Subject: Re: file system deadlock - the whole story? Message-ID: <20060719112208.Y1799@ganymede.hub.org> In-Reply-To: <20060719151327.H5132@fledge.watson.org> References: <E1FxzUU-000MMw-5m@cs1.cs.huji.ac.il> <20060705100403.Y80381@fledge.watson.org> <cone.1152136419.991036.72616.1000@zoraida.natserv.net> <20060705234514.I70011@fledge.watson.org> <20060715000351.U1799@ganymede.hub.org> <20060715035308.GJ32624@deviant.kiev.zoral.com.ua> <20060718074804.W1799@ganymede.hub.org> <20060719112424.GK1464@deviant.kiev.zoral.com.ua> <20060719082627.H1799@ganymede.hub.org> <20060719151327.H5132@fledge.watson.org>
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On Wed, 19 Jul 2006, Robert Watson wrote: > > On Wed, 19 Jul 2006, User Freebsd wrote: > >> Also note that under FreeBSD 4.x, all three of these machines were pretty >> much my more solid machines, with even more vServers running on them then >> I'm able to run with 6.x ... once I got rid of using unionfs, stability >> skyrocketed :( >> >> Hrmmmm ... but, your 'controller driver' comment ... that is one common >> thing amongst all three servers ... they are all running the iir driver ... >> not sure the *exact* controller, but pluto (older Dual-PIII) shows it as: > > Yes, this was going to be my next question -- if you're seeing wedges under > load and there's a common controller in use, maybe we're looking at a driver > bug. Bugs of those sort typically look a lot like what you describe: an I/O > is "lost" and so eveything that depends on the I/O wedges waiting for it, > leading to a lot of processes hanging around waiting for vnode locks, etc. 'k, but how do we debug *that*? :( If it was one, I'd suspect hardware ... but *three*, and only acting up *after* upgrading to FreeBSD 6.x, and only acting up under load ... ---- Marc G. Fournier Hub.Org Networking Services (http://www.hub.org) Email . scrappy@hub.org MSN . scrappy@hub.org Yahoo . yscrappy Skype: hub.org ICQ . 7615664
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