* Kernel panic from "btrfs subvolume delete" @ 2012-06-29 10:11 Richard Cooper 2012-06-29 10:42 ` Fajar A. Nugraha 0 siblings, 1 reply; 6+ messages in thread From: Richard Cooper @ 2012-06-29 10:11 UTC (permalink / raw) To: linux-btrfs Hi All, I have two machines where I've been testing various btrfs based backup strategies. They are both Cent OS 6 with the standard kernel and btrfs-progs RPMs from the CentOS repos. - kernel-2.6.32-220.17.1.el6.x86_64 - btrfs-progs-0.19-12.el6.x86_64 Both are currently in a state when trying to delete a subvolume results in the following kernel panic. ---------- [root@backup2 ~]# btrfs subvolume delete /srv/backup_history/2012-06-28-1342 Delete subvolume '/srv/backup_history/2012-06-28-1342' [root@backup2 ~]# Message from syslogd@backup2 at Jun 29 08:53:06 ... kernel:------------[ cut here ]------------ Message from syslogd@backup2 at Jun 29 08:53:06 ... kernel:invalid opcode: 0000 [#1] SMP Message from syslogd@backup2 at Jun 29 08:53:06 ... kernel:last sysfs file: /sys/devices/virtual/block/md1/md/metadata_version Message from syslogd@backup2 at Jun 29 08:53:06 ... kernel:Stack: Message from syslogd@backup2 at Jun 29 08:53:06 ... kernel:Call Trace: Message from syslogd@backup2 at Jun 29 08:53:06 ... kernel:Code: 89 ef e8 84 f5 fe ff 48 89 df 89 45 d8 e8 99 86 fe ff 8b 45 d8 48 8b 5d e0 4c 8b 65 e8 4c 8b 6d f0 4c 8b 75 f8 c9 c3 0f 0b eb fe <0f> 0b eb fe 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 eb f4 66 66 66 Message from syslogd@backup2 at Jun 29 08:53:06 ... kernel:Kernel panic - not syncing: Fatal exception ---------- Sometimes the kernel:last sysfs file line says "/sys/kernel/kexec_crash_loaded" instead. My setup is that /srv is a btrfs sat on /dev/md4 which is a 4 drive software RAID5 array. /srv/backups/data is a subvolume containing 65GB worth of test data. I've "btrfs subvolume snapshot"ed that data to a few new subvolumes under /srv/backup_history/. Now whenever I try to delete any of the snapshots on either machine I get a kernel panic. btrfsck look like this: [root@backup2 ~]# btrfsck /dev/md4 found 72254246912 bytes used err is 0 total csum bytes: 66815432 total tree bytes: 3835244544 total fs tree bytes: 3581440000 btree space waste bytes: 1187313778 file data blocks allocated: 68419002368 referenced 68418383872 Btrfs Btrfs v0.19 What should I do now? Do I need to upgrade to a more recent btrfs? If so, how? Can I provide any more information to help debug and fix the problem? Regards, - Rich ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Kernel panic from "btrfs subvolume delete" 2012-06-29 10:11 Kernel panic from "btrfs subvolume delete" Richard Cooper @ 2012-06-29 10:42 ` Fajar A. Nugraha 2012-06-29 11:17 ` Duncan 2012-06-29 14:23 ` Richard Cooper 0 siblings, 2 replies; 6+ messages in thread From: Fajar A. Nugraha @ 2012-06-29 10:42 UTC (permalink / raw) To: Richard Cooper; +Cc: linux-btrfs On Fri, Jun 29, 2012 at 5:11 PM, Richard Cooper <richard@richardcooper.net> wrote: > Hi All, > > I have two machines where I've been testing various btrfs based backup strategies. They are both Cent OS 6 with the standard kernel and btrfs-progs RPMs from the CentOS repos. > > - kernel-2.6.32-220.17.1.el6.x86_64 > - btrfs-progs-0.19-12.el6.x86_64 In btrfs terms, 2.6.32 is ... stone age :P > What should I do now? Do I need to upgrade to a more recent btrfs? Yep > If so, how? https://blogs.oracle.com/linux/entry/oracle_unbreakable_enterprise_kernel_release http://elrepo.org/tiki/kernel-ml -- Fajar ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Kernel panic from "btrfs subvolume delete" 2012-06-29 10:42 ` Fajar A. Nugraha @ 2012-06-29 11:17 ` Duncan 2012-06-29 14:23 ` Richard Cooper 1 sibling, 0 replies; 6+ messages in thread From: Duncan @ 2012-06-29 11:17 UTC (permalink / raw) To: linux-btrfs Fajar A. Nugraha posted on Fri, 29 Jun 2012 17:42:26 +0700 as excerpted: > On Fri, Jun 29, 2012 at 5:11 PM, Richard Cooper > <richard@richardcooper.net> wrote: >> Hi All, >> >> I have two machines where I've been testing various btrfs based backup >> strategies. They are both Cent OS 6 with the standard kernel and >> btrfs-progs RPMs from the CentOS repos. >> >> - kernel-2.6.32-220.17.1.el6.x86_64 - btrfs-progs-0.19-12.el6.x86_64 > > In btrfs terms, 2.6.32 is ... stone age :P Indeed! As both the kernel option and the btrfs wiki state, btrfs is an experimental filesystem under heavy development and fit for testing, not operational use. Oracle and I believe SuSE have paid support now if you want it, but to some extent that's by locking down your options, and otherwise, it's simply offering to let you pay them for recovery efforts if something does go wrong. Meanwhile, "under heavy development" in practice means that if you're using a kernel older than the last upstream release or two (so 3.3 at the very oldest!), you're testing extremely outdated code and the value of those tests both in reporting problems and in conclusions you yourself may draw from them is extremely limited. Latest upstream release, now 3.4, is really the oldest you should be running for btrfs testing, and many people run the development kernel rcs, 3.5-rc4 currently, or git-kernels, either Linus or btrfs-next (see the wiki). So 2.6.32... Do you still run kernel 2.2 on your non-btrfs machines, by any chance? Because that's what's comparable, in terms of btrfs development vs kernel development. >> What should I do now? Do I need to upgrade to a more recent btrfs? > > Yep > >> If so, how? > > https://blogs.oracle.com/linux/entry/ oracle_unbreakable_enterprise_kernel_release > http://elrepo.org/tiki/kernel-ml Or read up on the wiki and go mainline kernel: https://btrfs.wiki.kernel.org/ https://btrfs.wiki.kernel.org/index.php/Main_Page#Documentation https://btrfs.wiki.kernel.org/index.php/Btrfs_source_repositories -- Duncan - List replies preferred. No HTML msgs. "Every nonfree program has a lord, a master -- and if you use the program, he is your master." Richard Stallman ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Kernel panic from "btrfs subvolume delete" 2012-06-29 10:42 ` Fajar A. Nugraha 2012-06-29 11:17 ` Duncan @ 2012-06-29 14:23 ` Richard Cooper 2012-06-29 14:29 ` Fajar A. Nugraha 2012-06-29 14:29 ` Hugo Mills 1 sibling, 2 replies; 6+ messages in thread From: Richard Cooper @ 2012-06-29 14:23 UTC (permalink / raw) To: linux-btrfs On 29 Jun 2012, at 11:42, Fajar A. Nugraha wrote: >> What should I do now? Do I need to upgrade to a more recent btrfs? > > Yep > >> If so, how? > > https://blogs.oracle.com/linux/entry/oracle_unbreakable_enterprise_kernel_release > http://elrepo.org/tiki/kernel-ml Perfect, thank you! I was looking for a mainline kernel yum repo but my google-fu was failing me. That looks like just what I need. I've installed kernel v3.4.4 from http://elrepo.org/tiki/kernel-ml and that seems to have fixed my kernel panic. I'm still using the default Cent OS 6 versions of the btrfs userspace programs (v0.19). Any reason why that might be a bad idea? Thanks again, - Rich ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Kernel panic from "btrfs subvolume delete" 2012-06-29 14:23 ` Richard Cooper @ 2012-06-29 14:29 ` Fajar A. Nugraha 2012-06-29 14:29 ` Hugo Mills 1 sibling, 0 replies; 6+ messages in thread From: Fajar A. Nugraha @ 2012-06-29 14:29 UTC (permalink / raw) To: Richard Cooper; +Cc: linux-btrfs On Fri, Jun 29, 2012 at 9:23 PM, Richard Cooper <richard@richardcooper.net> wrote: >>> If so, how? >> >> https://blogs.oracle.com/linux/entry/oracle_unbreakable_enterprise_kernel_release >> http://elrepo.org/tiki/kernel-ml > > Perfect, thank you! I was looking for a mainline kernel yum repo but my google-fu was failing me. That looks like just what I need. > > I've installed kernel v3.4.4 from http://elrepo.org/tiki/kernel-ml and that seems to have fixed my kernel panic. I'm still using the default Cent OS 6 versions of the btrfs userspace programs (v0.19). Any reason why that might be a bad idea? At the very least, newer version of btrfsck has --repair, which you might need later in the future. There's also features lke forcing a certain compression (e.g. zlib) on a file as part of "btrfs filesystem defrag" command. Just grab updated btrfs-progs (or whatever it's called) from Oracle's repo. -- Fajar ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Kernel panic from "btrfs subvolume delete" 2012-06-29 14:23 ` Richard Cooper 2012-06-29 14:29 ` Fajar A. Nugraha @ 2012-06-29 14:29 ` Hugo Mills 1 sibling, 0 replies; 6+ messages in thread From: Hugo Mills @ 2012-06-29 14:29 UTC (permalink / raw) To: Richard Cooper; +Cc: linux-btrfs [-- Attachment #1: Type: text/plain, Size: 1221 bytes --] On Fri, Jun 29, 2012 at 03:23:13PM +0100, Richard Cooper wrote: > > On 29 Jun 2012, at 11:42, Fajar A. Nugraha wrote: > >> What should I do now? Do I need to upgrade to a more recent btrfs? > > > > Yep > > > >> If so, how? > > > > https://blogs.oracle.com/linux/entry/oracle_unbreakable_enterprise_kernel_release > > http://elrepo.org/tiki/kernel-ml > > Perfect, thank you! I was looking for a mainline kernel yum repo but my google-fu was failing me. That looks like just what I need. > > I've installed kernel v3.4.4 from http://elrepo.org/tiki/kernel-ml and that seems to have fixed my kernel panic. I'm still using the default Cent OS 6 versions of the btrfs userspace programs (v0.19). Any reason why that might be a bad idea? You miss out on new features (like scrub and btrfsck). Note that "0.19" could actually be any version from the last 3 years or so. Most distributions these days are putting a date in their package names -- anything from 20120328 or so is good. Hugo. -- === Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk === PGP key: 515C238D from wwwkeys.eu.pgp.net or http://www.carfax.org.uk --- Charting the inexorable advance of Western syphilisation... --- [-- Attachment #2: Digital signature --] [-- Type: application/pgp-signature, Size: 190 bytes --] ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2012-06-29 14:29 UTC | newest] Thread overview: 6+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2012-06-29 10:11 Kernel panic from "btrfs subvolume delete" Richard Cooper 2012-06-29 10:42 ` Fajar A. Nugraha 2012-06-29 11:17 ` Duncan 2012-06-29 14:23 ` Richard Cooper 2012-06-29 14:29 ` Fajar A. Nugraha 2012-06-29 14:29 ` Hugo Mills
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