On Tue, Mar 03, 2015 at 09:08:26PM -0500, J. Bruce Fields wrote: > On Wed, Mar 04, 2015 at 09:44:56AM +1100, Dave Chinner wrote: > > On Tue, Mar 03, 2015 at 05:10:33PM -0500, J. Bruce Fields wrote: > > > I'm getting mysterious crashes on a server exporting an xfs filesystem. > > > > > > Strangely, I've reproduced this on > > > > > > 93aaa830fc17 "Merge tag 'xfs-pnfs-for-linus-3.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs > > > > > > but haven't yet managed to reproduce on either of its parents > > > (24a52e412ef2 or 781355c6e5ae). That might just be chance, I'll try > > > again. > > > > I think you'll find that the bug is only triggered after that XFS > > merge because it's what enabled block layout support in the server, > > i.e. nfsd4_setup_layout_type() is now setting the export type to > > LAYOUT_BLOCK_VOLUME because XFS has added the necessary functions to > > it's export ops. > > Doh--after all the discussion I didn't actually pay attention to what > happened in the end. OK, I see, you're right, it's all more-or-less > dead code till that merge. > > Christoph's code was passing all my tests before that, so maybe we > broke something in the merge process. > > Alternatively, it could be because I've added more tests--I'll rerun my > current tests on his original branch.... The below is on Christoph's pnfsd-for-3.20-4 (at cd4b02e). Doesn't look very informative. I'm running xfstests over NFSv4.1 with client and server running the same kernel, the filesystem in question is xfs, but isn't otherwise available to the client (so the client shouldn't be doing pnfs). --b. BUG: unable to handle kernel paging request at 00000000757d4900 IP: [<ffffffff810b59af>] cpuacct_charge+0x5f/0xa0 PGD 0 Thread overran stack, or stack corrupted Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC Modules linked in: rpcsec_gss_krb5 nfsd auth_rpcgss oid_registry nfs_acl lockd grace sunrpc CPU: 1 PID: 18130 Comm: kworker/1:0 Not tainted 3.19.0-rc4-00205-gcd4b02e #79 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140709_153950- 04/01/2014 Workqueue: rpciod rpc_async_schedule [sunrpc] task: ffff880030639710 ti: ffff88001e698000 task.ti: ffff88001e698000 RIP: 0010:[<ffffffff810b59af>] [<ffffffff810b59af>] cpuacct_charge+0x5f/0xa0 RSP: 0018:ffff88007f903e08 EFLAGS: 00010092 RAX: 000000000000d4e8 RBX: 000000001e698038 RCX: 000000001e698038 RDX: ffffffff822377c0 RSI: 0000000000000003 RDI: ffff880030639f78 RBP: ffff88007f903e38 R08: 0000000000000000 R09: 0000000000000001 R10: 000000000000001b R11: ffffffff82238fc0 R12: 00000000003b4c1b R13: ffff880030639710 R14: ffff880030639710 R15: 0000001536dbb554 FS: 0000000000000000(0000) GS:ffff88007f900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000757d4900 CR3: 000000006d8e2000 CR4: 00000000000406e0 Stack: ffffffff810b5955 0000000000000000 ffff88007f903e98 ffff880030639778 ffff88007f913698 00000000003b4c1b ffff88007f903e78 ffffffff810a47d0 ffff88007f903e78 ffff880030639778 ffff88007f913698 ffff88007f913600 Call Trace: <IRQ> [<ffffffff810b5955>] ? cpuacct_charge+0x5/0xa0 [<ffffffff810a47d0>] update_curr+0xd0/0x190 [<ffffffff810a767f>] task_tick_fair+0x1df/0x4f0 [<ffffffff8109e147>] scheduler_tick+0x57/0xd0 [<ffffffff810d7e11>] update_process_times+0x51/0x60 [<ffffffff810e43df>] tick_periodic+0x2f/0xc0 [<ffffffff8165b517>] ? debug_smp_processor_id+0x17/0x20 [<ffffffff810e4599>] tick_handle_periodic+0x29/0x70 [<ffffffff81033e6a>] local_apic_timer_interrupt+0x3a/0x70 [<ffffffff81a8fb81>] smp_apic_timer_interrupt+0x41/0x60 [<ffffffff81a8df1f>] apic_timer_interrupt+0x6f/0x80 <EOI> Code: 31 c9 45 31 c0 31 f6 48 c7 c7 c0 8f 23 82 e8 a9 71 00 00 49 8b 85 c0 0f 00 00 48 63 cb 48 8b 50 58 0f 1f 00 48 8b 82 d0 00 00 00 <48> 03 04 cd 40 47 31 82 4c 01 20 48 8b 52 48 48 85 d2 75 e5 48 RIP [<ffffffff810b59af>] cpuacct_charge+0x5f/0xa0 RSP <ffff88007f903e08> CR2: 00000000757d4900 ---[ end trace fa7901843d14b3ab ]--- Kernel panic - not syncing: Fatal exception in interrupt Kernel Offset: 0x0 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffff9fffffff) ---[ end Kernel panic - not syncing: Fatal exception in interrupt _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
