Date: Sun, 20 Feb 2011 10:55:34 -0500 From: Andrew Boyer <aboyer@averesystems.com> To: freebsd-current@freebsd.org, freebsd-stable@freebsd.org Cc: Andrey Smagin <samspeed@mail.ru>, Eugene Grosbein <egrosbein@rdtc.ru>, Jeremy Chadwick <freebsd@jdc.parodius.com> Subject: Re: About "panic: bufwrite: buffer is not busy???" Message-ID: <B141F65F-FCFB-4DF1-B4B8-1C85B088A47F@averesystems.com> In-Reply-To: <20110220154651.GA17661@icarus.home.lan> References: <4D4A38FD.7000607@rdtc.ru> <4D3011DB.9050900@frasunek.com> <4FD1B1C3-08A7-4F48-A30A-DE5A8F3D3834@averesystems.com> <E1PrAM9-0001fN-00.samspeed-mail-ru@f30.mail.ru> <4D6133AC.6070507@sentex.net> <20110220154651.GA17661@icarus.home.lan>
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On Feb 20, 2011, at 10:46 AM, Jeremy Chadwick wrote: > On Sun, Feb 20, 2011 at 10:30:52AM -0500, Mike Tancsa wrote: >> On 2/20/2011 9:33 AM, Andrey Smagin wrote: >>> On week -current I have same problem, my box paniced every 2-15 min. = I resolve problem by next steps - unplug network connectors from 2 intel = em (82574L) cards. I think last time that mpd5 related panic, but mpd5 = work with another re interface interated on MB. I think it may be em = related panic, or em+mpd5. >>=20 >> The latest panic I saw didnt have anything to do with em. Are you = sure >> your crashes are because of the nic drive ? >=20 > Not to mention, the error string the OP provided (see Subject) is only > contained in one file: sys/ufs/ffs/ffs_vfsops.c, function > ffs_bufwrite(). So, that would be some kind of weird = filesystem-related > issue, not NIC-specific. I have no idea how to debug said problem. >=20 The issue is the file system activity occurring in parallel with the = coredump, which is strange. It seems like everything else should be = halted before the dump begins but I couldn't find a place in the code = that actually tries to stop the other CPUs. My question isn't about the initial panic (I was using the sysctl to = provoke one), but about the secondary panic. This is on 8-core systems. -Andrew -------------------------------------------------- Andrew Boyer aboyer@averesystems.com
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