Date: Fri, 7 Aug 2009 09:44:00 +0200 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: Boris Kochergin <spawk@acm.poly.edu> Cc: freebsd-fs@freebsd.org Subject: Re: ZFS RAID-Z panic on vdev failure + subsequent panics and hangs Message-ID: <20090807074400.GB1607@garage.freebsd.pl> In-Reply-To: <20090807073738.GA1607@garage.freebsd.pl> References: <4A78AA71.9050107@acm.poly.edu> <4A78AFB2.10103@acm.poly.edu> <20090805115621.GG1784@garage.freebsd.pl> <4A798A12.4070408@acm.poly.edu> <20090807073738.GA1607@garage.freebsd.pl>
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[-- Attachment #1 --] On Fri, Aug 07, 2009 at 09:37:38AM +0200, Pawel Jakub Dawidek wrote: > On Wed, Aug 05, 2009 at 09:33:06AM -0400, Boris Kochergin wrote: > > Fatal trap 12: page fault while in kernel mode > > fault virtual address = 0xffffffffffffffe9 > > fault code = supervisor read data, page not present > > instruction pointer = 0x20:0xffffffff8103a9e7 > > stack pointer = 0x28:0xffffff8077f26430 > > frame pointer = 0x28:0xffffff8077f26500 > > code segment = base 0x0, limit 0xfffff, type 0x1b > > = DPL 0, pres 1, long 1, def32 0, gran 1 > > processor eflags = interrupt enabled, resume, IOPL = 0 > > current process = 972 (cp) > [...] > > /usr/src/sys/amd64/amd64/trap.c:494 > > #11 0xffffffff80854d73 in calltrap () at > > /usr/src/sys/amd64/amd64/exception.S:224 > > #12 0xffffffff8103a9e7 in arc_evict (state=Variable "state" is not > > available. > > ) at > > /usr/src/sys/modules/zfs/../../cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c:1489 > > Could you tell me what do you have at this line in your source? I don't > think you use HEAD... What exact FreeBSD version are you using? You already gave version number in your first mail, sorry about that. 8.0-BETA2 should be very close to HEAD (or it actually was HEAD), so I guess this is the code we are looking at: 1488: /* "lookahead" for better eviction candidate */ 1489: if (recycle && ab->b_size != bytes && 1490: ab_prev && ab_prev->b_size == bytes) 1491: continue; If 'ab' is corrupted it should panic earlier, so it seems ab_prev is corrupted, can you see what it points to in gdb? -- Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4 (FreeBSD) iD8DBQFKe9tAForvXbEpPzQRAoYQAJ93SwrZRKfO+oIxSIHSGoXPC4MSvQCeKp0b 4R79PwGqH+NIW3oGUYhD1mM= =Fs3k -----END PGP SIGNATURE-----
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