On Fri, Nov 05, 2021 at 01:25:05PM -0400, Theodore Ts'o wrote: > Is this a known failure? I can reliably reproduce this soft lockup > running xfs/170 using "gce-xfstests -c xfs/v4 xfs/170" using > v5.15-rc4. The xfs/v4 test config formats the file system using -m > crc=0 with no special mount options. > > I've attached the kernel config that I used; it's the standard one > obtained via "gce-xfstests install-kconfig"[1]. Is the system totally idle, or is it still pounding the storage? The softlockup looks like we're stuck trying to lock an AGF buffer, which could just be the result of a long(ish) stall due to other threads or the log or something else. I guess "3h6m10s" implies it just died for 3+ hours. Also, uh... 5.15 didn't prove to be a stable testing base (at least not without a bunch of other patches to kvm, the memory manager, and the block layer) until 5.15-rc7. --D > > > [1] https://github.com/tytso/xfstests-bld/blob/master/kvm-xfstests/util/install-kconfig > > Thanks, > > - Ted > > commit adac31869b098d5f85d0930874dcf6a524d128d3 > Author: Theodore Ts'o <tytso@xxxxxxx> > Date: Fri Nov 5 13:10:35 2021 -0400 > > test-appliance: add xfs/170 to xfs/v4's exclude file > > The xfs/170 test is reliably causing a soft lockup when run on a file > system formatted with mkfs.xfs -m crc=0. > > CONFIG: xfs/v4 > ZONE: us-east1-b > VM STATUS: timeout on one test (xfs/170) > SINCE LAST UPDATE: 3h6m10s > TEST STATUS: hang > > run fstests xfs/170 at 2021-11-05 02:27:05 > ... > [11024.269799] XFS (dm-1): Unmounting Filesystem > [11024.695394] XFS (dm-1): Mounting V4 Filesystem > [11024.731406] XFS (dm-1): Ending clean mount > [11024.731552] xfs filesystem being mounted at /xt-vdc supports timestamps until 2038 (0x7fffffff) > watchdog: BUG: soft lockup - CPU#1 stuck for 26s! [dd:9671] > irq event stamp: 22146924 > hardirqs last enabled at (22146923): [<ffffffff903cebad>] _raw_spin_unlock_irqrestore+0x2d/0x40 > hardirqs last disabled at (22146924): [<ffffffff903bd4fb>] sysvec_apic_timer_interrupt+0xb/0x90 > softirqs last enabled at (16886422): [<ffffffff906002ce>] __do_softirq+0x2ce/0x3fd > softirqs last disabled at (16886399): [<ffffffff8f6bc1e8>] __irq_exit_rcu+0x88/0xb0 > CPU: 1 PID: 9671 Comm: dd Not tainted 5.15.0-rc4-xfstests-00018-g124e7c61deb2 #382 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 > RIP: 0010:_raw_spin_unlock_irqrestore+0x35/0x40 > Code: c7 18 53 48 89 f3 48 8b 74 24 10 e8 e5 3b 35 ff 48 89 ef e8 dd 66 35 ff 80 e7 02 74 06 e8 f3 77 3e ff fb 65 ff 0d 4b 82 c4 6f <5b> 5d c3 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 41 54 65 ff 05 32 > RSP: 0018:ffffa055c2913598 EFLAGS: 00000246 > RAX: 000000000151ef6b RBX: 0000000000000282 RCX: 0000000000000040 > RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff903cebad > RBP: ffff945d3aff4be0 R08: 0000000000000001 R09: 0000000000000001 > R10: 0000000000000000 R11: 0000000000080000 R12: 0000000000000000 > R13: ffffa055c2913640 R14: ffff945d13892a10 R15: ffff945d13892a58 > FS: 00007f62407d8580(0000) GS:ffff945dd9400000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007f6240613000 CR3: 000000014bc04004 CR4: 00000000003706e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > down_trylock+0x25/0x30 > xfs_buf_trylock+0x17/0x190 > xfs_buf_find+0x1b3/0x4a0 > xfs_buf_get_map+0x44/0x3a0 > xfs_buf_read_map+0x52/0x2e0 > ? xfs_read_agf+0xa3/0x180 > xfs_trans_read_buf_map+0x144/0x430 > ? xfs_read_agf+0xa3/0x180 > ? __lock_acquire+0x3a7/0x6c0 > xfs_read_agf+0xa3/0x180 > xfs_alloc_read_agf+0x4c/0x110 > xfs_alloc_pagf_init+0x27/0x60 > xfs_filestream_pick_ag+0x280/0x530 > xfs_filestream_new_ag+0x87/0x100 > xfs_bmap_btalloc_filestreams.constprop.0+0xe0/0x120 > xfs_bmap_btalloc+0x3e6/0x700 > xfs_bmapi_allocate+0xe4/0x310 > xfs_bmapi_write+0x42a/0x580 > xfs_iomap_write_direct+0x18d/0x210 > xfs_direct_write_iomap_begin+0x3ab/0x690 > ? lock_is_held_type+0x98/0x100 > iomap_iter+0x12b/0x240 > __iomap_dio_rw+0x1ff/0x630 > iomap_dio_rw+0xa/0x30 > xfs_file_dio_write_aligned+0xae/0x1c0 > xfs_file_write_iter+0xd8/0x130 > new_sync_write+0x122/0x1b0 > ? mod_objcg_state+0x180/0x2a0 > vfs_write+0x25d/0x370 > ksys_write+0x68/0xe0 > do_syscall_64+0x3b/0x90 > entry_SYSCALL_64_after_hwframe+0x44/0xae > RIP: 0033:0x7f6240700504 > Code: 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b3 0f 1f 80 00 00 00 00 48 8d 05 f9 61 0d 00 8b 00 85 c0 75 13 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 54 c3 0f 1f 00 41 54 49 89 d4 55 48 89 f5 53 > RSP: 002b:00007ffdac48f148 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 > RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f6240700504 > RDX: 0000000000100000 RSI: 00007f6240514000 RDI: 0000000000000001 > RBP: 0000000000100000 R08: 00000000ffffffff R09: 0000000000000000 > R10: ffffffffffffff3b R11: 0000000000000246 R12: 00007f6240514000 > R13: 0000000000000000 R14: 0000000000000000 R15: 00007f6240514000 > > Signed-off-by: Theodore Ts'o <tytso@xxxxxxx> > > diff --git a/kvm-xfstests/test-appliance/files/root/fs/xfs/cfg/v4.exclude b/kvm-xfstests/test-appliance/files/root/fs/xfs/cfg/v4.exclude > index a9acba9c..83ccfd79 100644 > --- a/kvm-xfstests/test-appliance/files/root/fs/xfs/cfg/v4.exclude > +++ b/kvm-xfstests/test-appliance/files/root/fs/xfs/cfg/v4.exclude > @@ -1,2 +1,16 @@ > # Normal configurations don't support dax > -g dax > + > +# On a 5.15-rc4 kernel, xfs/170 reliably causes a soft lockup in > +# xfs_alloc_read_agf()+0x41/0x110. Call stack: > +# > +# xfs_alloc_pagf_init+0x27/0x60 > +# xfs_filestream_pick_ag+0x280/0x530 > +# xfs_filestream_new_ag+0x87/0x100 > +# xfs_bmap_btalloc_filestreams.constprop.0+0xe0/0x120 > +# xfs_bmap_btalloc+0x3e6/0x700 > +# xfs_bmapi_allocate+0xe4/0x310 > +# xfs_bmapi_convert_delalloc+0x26c/0x480 > +# xfs_map_blocks+0x1b5/0x510 > +# ... > +xfs/170
