Date: Wed, 27 Aug 2008 16:17:20 -0400 (EDT) From: Weldon S Godfrey 3 <weldon@excelsus.com> To: Jeremy Chadwick <koitsu@FreeBSD.org> Cc: freebsd-fs@freebsd.org, pjd@FreeBSD.org Subject: Re: ZFS-NFS kernel panic under load Message-ID: <20080827161150.G76650@emmett.excelsus.com> In-Reply-To: <20080822174411.GA89610@eos.sc1.parodius.com> References: <20080806101621.H24586@emmett.excelsus.com> <20080814091337.Y94482@emmett.excelsus.com> <20080821153107.W76650@emmett.excelsus.com> <20080821194742.GA19362@eos.sc1.parodius.com> <20080822115932.M76650@emmett.excelsus.com> <20080822174411.GA89610@eos.sc1.parodius.com>
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Well, I am not sure if it was exactly that bug, since the last time I paniced, it never dumped to memory. Although this time i paniced, it started to dump then locked up solid. before I paniced I did get an error message at the end of the panic: Stopped at nfsrv_access at 0x190 testb 0x1, 0xa4 (%rax) I did hard reboot after lockup and tried savecore manually, it said it found no cores. (I did wait a good while and verified the drive lights was not running when I hard rebooted). Although I am guessing at this point I could go back to 7.0-R for testing this bug since it appears to be a problem with NFS and ZFS on either v6 or v11 of the filesystem. I will be happy to help debug the issue with anyone, I just need someone that is more knowledgeable of NFS and/or ZFS than I (which is most) Thanks, Weldon If memory serves me right, sometime around Friday, Jeremy Chadwick told me: > On Fri, Aug 22, 2008 at 12:02:47PM -0400, Weldon S Godfrey 3 wrote: >> Ok, I tried panic, it gave a page of the typical panic page that this >> crash generates under 7.0. I rebooted and no core, so I am missing a >> step. Sorry for being clueless here. > > Then you're probably being bit by what's listed in the below PR. > Supposedly you can do "panic", it should dump memory contents to swap, > then upon rebooting go into single-user mode, "mount -a", then run > savecore. A real PITA, I know, but supposedly it works. > > I can't help with the cause of the actual panic, however; it's outside > of my skillset. >
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