Kernel panic: unable to handle paging requests

[axellec]

This occurred suddenly on the host, after a fresh reboot.
Note there is another filed bug for unable to handle paging requests, but the reasons and call stack seem to be different, so I am filing a different bug.

I am running ZFS, with a single pool, on a fresh Xubuntu 12 install, x86 32 bits, boot options modified to vmalloc=512M.

May 25 17:11:10 gavial kernel: [ 443.152209] BUG: unable to handle kernel paging request at ff9cb000
May 25 17:11:10 gavial kernel: [ 443.152291] IP: [] memcpy+0x1d/0x40
May 25 17:11:10 gavial kernel: [ 443.152347] *pde = 1e287067 *pte = 00000000
May 25 17:11:10 gavial kernel: [ 443.152395] Oops: 0000 [#1] SMP
May 25 17:11:10 gavial kernel: [ 443.152438] Modules linked in: rfcomm parport_pc bnep ppdev nls_iso8859_1 nls_cp437 vfat fat snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm dcdbas snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device snd btusb soundcore psmouse bluetooth serio_raw snd_page_alloc shpchp mac_hid i915 drm_kms_helper drm i2c_algo_bit video lp parport zfs(P) zcommon(P) znvpair(P) zavl(P) zunicode(P) spl(O) zlib_deflate e1000 floppy
May 25 17:11:10 gavial kernel: [ 443.152954]
May 25 17:11:10 gavial kernel: [ 443.152973] Pid: 1928, comm: flush-zfs-2 Tainted: P O 3.2.0-24-generic #39-Ubuntu Dell Computer Corporation OptiPlex GX270 /0DG284
May 25 17:11:10 gavial kernel: [ 443.153102] EIP: 0060:[] EFLAGS: 00010206 CPU: 1
May 25 17:11:10 gavial kernel: [ 443.153154] EIP is at memcpy+0x1d/0x40
May 25 17:11:10 gavial kernel: [ 443.153190] EAX: ebce5000 EBX: 00020000 ECX: 00007c00 EDX: ff9ca000
May 25 17:11:10 gavial kernel: [ 443.153245] ESI: ff9cb000 EDI: ebce6000 EBP: d6073c60 ESP: d6073c54
May 25 17:11:10 gavial kernel: [ 443.153299] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
May 25 17:11:10 gavial kernel: [ 443.153348] Process flush-zfs-2 (pid: 1928, ti=d6072000 task=d5d371a0 task.ti=d6072000)
May 25 17:11:10 gavial kernel: [ 443.153419] Stack:
May 25 17:11:10 gavial kernel: [ 443.153439] d73ee7f8 00020000 00000000 d6073cb0 dfb3a7b9 00000000 00000000 00080170
May 25 17:11:10 gavial kernel: [ 443.153546] 00000000 00000000 dfbd4c76 d6073ca0 d6073c9c 00000000 00020000 00000000
May 25 17:11:10 gavial kernel: [ 443.153646] 00020000 00000000 db8d7020 00000005 d5929f40 00000000 00000000 d6073d30
May 25 17:11:10 gavial kernel: [ 443.153748] Call Trace:
May 25 17:11:10 gavial kernel: [ 443.153830] [] dmu_write+0xc9/0x1b0 [zfs]
May 25 17:11:10 gavial kernel: [ 443.153955] [] zfs_putpage+0x20f/0x310 [zfs]
May 25 17:11:10 gavial kernel: [ 443.154004] [] ? prio_tree_next+0x8b/0x160
May 25 17:11:10 gavial kernel: [ 443.154053] [] ? _raw_spin_lock+0xd/0x10
May 25 17:11:10 gavial kernel: [ 443.154140] [] zpl_putpage+0x34/0x60 [zfs]
May 25 17:11:10 gavial kernel: [ 443.154188] [] write_cache_pages+0x193/0x3f0
May 25 17:11:10 gavial kernel: [ 443.154289] [] ? zpl_readpage+0x60/0x60 [zfs]
May 25 17:11:10 gavial kernel: [ 443.154394] [] zpl_writepages+0x18/0x20 [zfs]
May 25 17:11:10 gavial kernel: [ 443.154445] [] do_writepages+0x22/0x40
May 25 17:11:10 gavial kernel: [ 443.154492] [] writeback_single_inode+0x129/0x390
May 25 17:11:10 gavial kernel: [ 443.154545] [] writeback_sb_inodes+0x159/0x1f0
May 25 17:11:10 gavial kernel: [ 443.154596] [] __writeback_inodes_wb+0x74/0xa0
May 25 17:11:10 gavial kernel: [ 443.154647] [] wb_writeback+0x22b/0x2d0
May 25 17:11:10 gavial kernel: [ 443.154693] [] wb_check_old_data_flush+0x80/0x90
May 25 17:11:10 gavial kernel: [ 443.154743] [] wb_do_writeback+0x100/0x160
May 25 17:11:10 gavial kernel: [ 443.154790] [] ? usleep_range+0x40/0x40
May 25 17:11:10 gavial kernel: [ 443.154836] [] bdi_writeback_thread+0x75/0x240
May 25 17:11:10 gavial kernel: [ 443.154884] [] ? wb_do_writeback+0x160/0x160
May 25 17:11:10 gavial kernel: [ 443.154932] [] kthread+0x6d/0x80
May 25 17:11:10 gavial kernel: [ 443.154971] [] ? flush_kthread_worker+0x80/0x80
May 25 17:11:10 gavial kernel: [ 443.155024] [] kernel_thread_helper+0x6/0x10
May 25 17:11:10 gavial kernel: [ 443.155069] Code: c3 90 8d 74 26 00 e8 43 fe ff ff eb e8 90 55 89 e5 83 ec 0c 89 5d f4 89 75 f8 89 7d fc 3e 8d 74 26 00 89 cb 89 c7 c1 e9 02 89 d6 a5 89 d9 83 e1 03 74 02 f3 a4 8b 5d f4 8b 75 f8 8b 7d fc 89
May 25 17:11:10 gavial kernel: [ 443.155677] EIP: [] memcpy+0x1d/0x40 SS:ESP 0068:d6073c54
May 25 17:11:10 gavial kernel: [ 443.155743] CR2: 00000000ff9cb000
May 25 17:11:10 gavial kernel: [ 443.182224] ---[ end trace 9f2dea0da3406569 ]---
May 25 17:12:14 gavial kernel: Kernel logging (proc) stopped.

[FransUrbo]

@axellec @behlendorf Is this still an issue? Considering this bug is two years old...

[behlendorf]

Closing. This is believed to have been addressed.