Date: Tue, 18 Aug 2009 08:57:21 -0400 From: Boris Kochergin <spawk@acm.poly.edu> To: Pawel Jakub Dawidek <pjd@FreeBSD.org> Cc: freebsd-fs@freebsd.org Subject: Re: ZFS RAID-Z panic on vdev failure + subsequent panics and hangs Message-ID: <4A8AA531.2000004@acm.poly.edu> In-Reply-To: <4A81CF20.7010108@acm.poly.edu> References: <4A78AFB2.10103@acm.poly.edu> <20090805115621.GG1784@garage.freebsd.pl> <4A798A12.4070408@acm.poly.edu> <20090807073738.GA1607@garage.freebsd.pl> <20090807074400.GB1607@garage.freebsd.pl> <4A7C3002.8000003@acm.poly.edu> <20090807191334.GA1814@garage.freebsd.pl> <4A7C81CA.2040303@acm.poly.edu> <20090807193842.GA2487@garage.freebsd.pl> <4A7C87C5.1070608@acm.poly.edu> <20090807202756.GB2487@garage.freebsd.pl> <4A81CF20.7010108@acm.poly.edu>
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Boris Kochergin wrote: > Pawel Jakub Dawidek wrote: >> On Fri, Aug 07, 2009 at 04:00:05PM -0400, Boris Kochergin wrote: >> >>> Pawel Jakub Dawidek wrote: >>> >>>> On Fri, Aug 07, 2009 at 03:34:34PM -0400, Boris Kochergin wrote: >>>> >>>> >>>>> Pawel Jakub Dawidek wrote: >>>>> >>>>>> Yeah, that's strange indeed. Could you try: >>>>>> >>>>>> print ab->b_arc_node.list_prev >>>>>> print ab->b_arc_node.list_next >>>>>> >>>>>> >>>>>> >>>>> (kgdb) print ab->b_arc_node.list_prev >>>>> $1 = (struct list_node *) 0x1 >>>>> >>>> Yeah, list_prev is corrupted. If it panics on you everytime, I could >>>> send you a patch which will try to catch where the corruption occurs. >>>> >>>> >>>> >>> I eventually get the arc_evict panic every time I successfully >>> manage to mount the filesystem, but it usually panics (with the >>> other backtrace) as soon as I try to mount it, or mount just hangs. >>> I'll gladly try the patch, though--the data on the array is >>> important to me. Thanks. >>> >> >> To get the data from there you could also try to 'zfs send' it without >> mounting the dataset at all (just in case). >> >> > Sorry for the delay. I had to find another machine to move the disks > into so that I could continue experimenting. Anyway, the filesystem > didn't have any snapshots I could send, so I tried creating one with > "zfs snapshot home@1" and the machine hung. > > FYI, In the new machine, all disks (including the one with the / > filesystem) retain their device names. > > -Boris > _______________________________________________ > 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" Some more panics using RELENG_8 sources from yesterday: http://acm.poly.edu/~spawk/zfs/. The one in panic3.txt happens much more often than the other ones. If any brave soul wants to look into it, I can provide NFS/geom_gate/whatever access to the disk images (or actual disks, if there's a difference) so that they can recreate the problem on a local machine. -Boris
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