Date: Wed, 19 Jul 2006 11:49:11 -0300 (ADT) From: User Freebsd <freebsd@hub.org> To: Kostik Belousov <kostikbel@gmail.com> Cc: freebsd-stable@freebsd.org, Robert Watson <rwatson@freebsd.org> Subject: Re: file system deadlock - the whole story? Message-ID: <20060719114751.X1799@ganymede.hub.org> In-Reply-To: <20060719144305.GM1464@deviant.kiev.zoral.com.ua> References: <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> <20060719112208.Y1799@ganymede.hub.org> <20060719144305.GM1464@deviant.kiev.zoral.com.ua>
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On Wed, 19 Jul 2006, Kostik Belousov wrote: > On Wed, Jul 19, 2006 at 11:23:21AM -0300, User Freebsd wrote: >> 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 ... > > Obvious step would be to replace controller by some different kind. Unfortunately, that one isn't an option ... these aren't local machines that I can easily swap hardware in :( ---- 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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