With the latest btrfs changes, I got this Oops when doing rm on a large directory: BUG: unable to handle kernel NULL pointer dereference at (null) IP: [<c101c838>] kunmap+0x46/0x46 *pdpt = 0000000034a85001 *pde = 0000000000000000 Oops: 0000 [#1] PREEMPT SMP last sysfs file: /sys/devices/virtual/vtconsole/vtcon1/uevent Modules linked in: snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss fuse dm_crypt dm_mod usbhid snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm snd_timer sr_mod cdrom sg snd fschmd e1000 uhci_hcd snd_page_alloc i2c_i801 [last unloaded: microcode] Pid: 1156, comm: btrfs-transacti Tainted: G W 2.6.39-rc1-00262- gc53813f #20 FUJITSU SIEMENS SCENIC P / SCENICO P/D1561 EIP: 0060:[<c101c838>] EFLAGS: 00010296 CPU: 1 EIP is at kmap+0x0/0x38 EAX: 00000000 EBX: 00000000 ECX: 00000000 EDX: 00000010 ESI: f5bc6400 EDI: f3c75520 EBP: f3c755f0 ESP: f58f9e10 DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 Process btrfs-transacti (pid: 1156, ti=f58f8000 task=f6516f40 task.ti=f58f8000) Stack: c1186d15 ffc22000 f58f9ec0 00000010 f3c75610 00000000 f5885780 f52339e8 00000009 f5bc6400 00010000 00000000 f6415800 f3c75638 000008bb f5bc63c0 f58857b4 f60b68a0 00000040 f52338e8 ffc22000 00000000 00000008 00000010 Call Trace: [<c1186d15>] ? btrfs_write_out_cache+0x60c/0xa3c [<c114a815>] ? btrfs_write_dirty_block_groups+0x400/0x494 [<c11566a7>] ? commit_cowonly_roots+0xa9/0x180 [<c1157799>] ? btrfs_commit_transaction+0x2ee/0x59c [<c1037c85>] ? wake_up_bit+0x16/0x16 [<c1152a83>] ? transaction_kthread+0x149/0x1d6 [<c101d1b9>] ? complete+0x28/0x36 [<c115293a>] ? btrfs_congested_fn+0x5d/0x5d [<c10379c4>] ? kthread+0x63/0x68 [<c1037961>] ? kthread_worker_fn+0xeb/0xeb [<c13cba36>] ? kernel_thread_helper+0x6/0xd Code: 8d 8a 00 e4 54 c1 2b 8a 8c e7 54 c1 81 f9 00 08 00 00 74 11 81 f9 00 0c 00 00 75 0e 83 3d 10 2f 60 c1 02 75 05 e9 5e a3 04 00 c3 <8b> 10 c1 ea 1e c1 e2 0a 8d 8a 00 e4 54 c1 2b 8a 8c e7 54 c1 81 EIP: [<c101c838>] kmap+0x0/0x38 SS:ESP 0068:f58f9e10 CR2: 0000000000000000 ---[ end trace c8511126ee91dfdf ]--- This is the second Oops. On the first one I wasn't able to catch the backtrace, but IIRC the bug happend on kmap not kunmap the first time. regards, Johannes -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
