Date: Mon, 11 Mar 2013 20:38:25 -0500 From: Bryan Drewery <bryan-lists@shatow.net> To: =?UTF-8?B?VXJvxaEgR3J1YmVy?= <uros.gruber@gmail.com> Cc: freebsd-fs@freebsd.org Subject: Re: zfs hang with umount Message-ID: <513E8711.2080909@shatow.net> In-Reply-To: <CAHGMo95Sx_5EEvj9-8m_Eck0D16ricbLrfPTeMbUV0=xwP4zVg@mail.gmail.com> References: <CAHGMo95Giii7ttxbNVEL1BKez5BGhktqBqamuuSd91n2yReiWw@mail.gmail.com> <513E4B0B.3090807@FreeBSD.org> <CAHGMo95Sx_5EEvj9-8m_Eck0D16ricbLrfPTeMbUV0=xwP4zVg@mail.gmail.com>
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On 3/11/2013 4:43 PM, Uroš Gruber wrote: > Hi Andriy, > > can you tell me more about this or what was the cause for this so I > can avoid it until 9.2 is released. I don't want to jump on 9-STABLE > and maybe have more problems with some other stuff. > This can very easily happen with `umount -f`. My understanding is it just takes a file descriptor being open to an unlinked file. Best to avoid -f if possible. If you run into one of these deadlocks you'll need to restart, possibly with reboot(8). > regards > > Uros > > On 11 March 2013 22:22, Andriy Gapon <avg@freebsd.org> wrote: >> on 11/03/2013 20:20 Uroš Gruber said the following: >>> Hi, >>> >>> I don't know what causes this, but while stopping one of jails I also >>> run zfs inherit mountpoint on this jails fs. This jail was in stopping >>> state at this moment. Process than hanged in D state. Then I was doing >>> some stuff on the server, and while "zfs unmount -f" of that fs, >>> server chrased. Now everytime I wan't to unmount that fs process hang. >>> I've managed to send & receive this fs to other fs and mounted >>> sucessfuly. >>> >>> Before I reboot and try to destroy this fs, here is output of procstat >>> -k PID (zfs umount zroot/myfs) >>> >>> PID TID COMM TDNAME KSTACK >>> 3937 100559 zfs - mi_switch >>> sleepq_timedwait _sleep zfs_zget zfs_get_data zil_commit >>> zfs_freebsd_write VOP_WRITE_APV vnode_pager_generic_putpages >>> vnode_pager_putpages vm_pageout_flush vm_object_page_collect_flush >>> vm_object_page_clean vm_object_terminate vnode_destroy_vobject >>> zfs_freebsd_reclaim vgonel vflush >>> >>> Is there anything I can check or is this know bug? >>> >>> Server is running on 9.1-RELEASE >> >> This should be fixed in stable/9. >> >> -- >> Andriy Gapon > _______________________________________________ > freebsd-fs@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-fs > To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org" > -- Regards, Bryan Drewery bdrewery@freenode/EFNet
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