kernel oops when trying to compile kernel on btrfs part

kernel oops when trying to compile kernel on btrfs part

[pragnesh radadia]

I got following kernel oops when trying to compile kernel on btrfs
partation on my laptop.

-pragnesh

Nov 19 00:38:53 linux-xfxc kernel: [22504.896045] ------------[ cut
here ]------------
Nov 19 00:38:53 linux-xfxc kernel: [22504.896052] kernel BUG at
/usr/src/packages/BUILD/kernel-desktop-2.6.31.5/linux-2.6.31/fs/btrfs/inode.c:735!
Nov 19 00:38:53 linux-xfxc kernel: [22504.896065] invalid opcode: 0000
[#1] PREEMPT SMP
Nov 19 00:38:53 linux-xfxc kernel: [22504.896074] last sysfs file:
/sys/devices/LNXSYSTM:00/device:00/PNP0C0A:00/power_supply/BAT0/charge_full
Nov 19 00:38:53 linux-xfxc kernel: [22504.896085] Modules linked in:
nls_utf8 michael_mic arc4 ecb lib80211_crypt_tkip af_packet
snd_pcm_oss snd_mixer_oss snd_seq snd_seq_device ed
d i915 drm i2c_algo_bit cpufreq_conservative cpufreq_userspace
cpufreq_powersave acpi_cpufreq speedstep_lib fuse btrfs zlib_deflate
cryptomgr aead pcompress crypto_blkcipher crc32c
 libcrc32c crypto_hash crypto_algapi loop dm_mod b44 snd_intel8x0m ssb
dell_laptop snd_intel8x0 snd_ac97_codec ac97_bus ohci1394 sdhci_pci
sdhci pcmcia yenta_socket ipw2200 rfkill
snd_pcm sr_mod snd_timer iTCO_wdt dcdbas joydev mmc_core
rsrc_nonstatic pcmcia_core ieee1394 libipw pcspkr iTCO_vendor_support
cdrom sg snd snd_page_alloc video ac battery button i
ntel_agp fan processor ide_pci_generic ide_core ata_generic thermal
thermal_sys [last unloaded: preloadtrace]
Nov 19 00:38:53 linux-xfxc kernel: [22504.896212]
Nov 19 00:38:53 linux-xfxc kernel: [22504.896219] Pid: 23, comm:
pdflush Not tainted (2.6.31.5-0.1-desktop #1) Inspiron 6000
Nov 19 00:38:53 linux-xfxc kernel: [22504.896231] EIP:
0060:[<f826e6dd>] EFLAGS: 00010286 CPU: 0
Nov 19 00:38:53 linux-xfxc kernel: [22504.896263] EIP is at
cow_file_range+0x54d/0x570 [btrfs]
Nov 19 00:38:53 linux-xfxc kernel: [22504.896270] EAX: ffffffe4 EBX:
00001000 ECX: c094c6e8 EDX: 00000000
Nov 19 00:38:53 linux-xfxc kernel: [22504.896277] ESI: 00000000 EDI:
ffffffff EBP: f63a5c70 ESP: f63a5bd4
Nov 19 00:38:53 linux-xfxc kernel: [22504.896285]  DS: 007b ES: 007b
FS: 00d8 GS: 00e0 SS: 0068
Nov 19 00:38:53 linux-xfxc kernel: [22504.896293] Process pdflush
(pid: 23, ti=f63a4000 task=f63a2f80 task.ti=f63a4000)
Nov 19 00:38:53 linux-xfxc kernel: [22504.896302] Stack:
Nov 19 00:38:53 linux-xfxc kernel: [22504.896306]  00037000 00000000
00001000 00000000 00000000 00000000 d2bc6000 00000000
Nov 19 00:38:53 linux-xfxc kernel: [22504.896320] <0> ffffffff
ffffffff f63a5c4f 00000001 00000000 cf5c3318 00000001 f6d48ca0
Nov 19 00:38:53 linux-xfxc kernel: [22504.896335] <0> cf5c3314
f3967364 00001000 00000000 f4858000 00037000 00000000 cf5c3310
Nov 19 00:38:53 linux-xfxc kernel: [22504.896351] Call Trace:
Nov 19 00:38:53 linux-xfxc kernel: [22504.896417]  [<f8272c75>]
run_delalloc_range+0xd5/0x120 [btrfs]
Nov 19 00:38:53 linux-xfxc kernel: [22504.896472]  [<f828be27>]
__extent_writepage+0x417/0xad0 [btrfs]
Nov 19 00:38:53 linux-xfxc kernel: [22504.896548]  [<f828c843>]
T.1032+0x163/0x2e0 [btrfs]
Nov 19 00:38:53 linux-xfxc kernel: [22504.896622]  [<f828caf1>]
extent_writepages+0x51/0x80 [btrfs]
Nov 19 00:38:53 linux-xfxc kernel: [22504.896697]  [<f826c48c>]
btrfs_writepages+0x2c/0x50 [btrfs]
Nov 19 00:38:53 linux-xfxc kernel: [22504.896735]  [<c02dc8ae>]
do_writepages+0x2e/0x60
Nov 19 00:38:53 linux-xfxc kernel: [22504.896750]  [<c0337041>]
writeback_single_inode+0x171/0x400
Nov 19 00:38:53 linux-xfxc kernel: [22504.896762]  [<c0337685>]
generic_sync_sb_inodes+0x155/0x4a0
Nov 19 00:38:53 linux-xfxc kernel: [22504.896772]  [<c0337a15>]
sync_sb_inodes+0x45/0x60
Nov 19 00:38:53 linux-xfxc kernel: [22504.896781]  [<c0337b24>]
writeback_inodes+0x54/0xf0
Nov 19 00:38:53 linux-xfxc kernel: [22504.896791]  [<c02dbf22>]
background_writeout+0xa2/0xe0
Nov 19 00:38:53 linux-xfxc kernel: [22504.896801]  [<c02dd719>]
__pdflush+0xf9/0x200
Nov 19 00:38:53 linux-xfxc kernel: [22504.896810]  [<c02dd863>]
pdflush+0x43/0x60
Nov 19 00:38:53 linux-xfxc kernel: [22504.896821]  [<c026e5c4>]
kthread+0x84/0x90
Nov 19 00:38:53 linux-xfxc kernel: [22504.896833]  [<c0204d8b>]
kernel_thread_helper+0x7/0x1c
Nov 19 00:38:53 linux-xfxc kernel: [22504.896842] Code: 00 e8 68 98 01
00 8b 45 d4 8b 55 d8 8b 5d b8 05 00 10 00 00 83 d2 00 0f ac d0 0c 01
03 8b 45 ac c7 00 01 00 00 00 e9 1f fe ff ff <0f> 0b eb fe 0f 0b eb fe
0f 0b eb fe e8 12 2f fe c7 f3 90 8b 4d
Nov 19 00:38:53 linux-xfxc kernel: [22504.896906] EIP: [<f826e6dd>]
cow_file_range+0x54d/0x570 [btrfs] SS:ESP 0068:f63a5bd4
Nov 19 00:38:53 linux-xfxc kernel: [22504.897267] ---[ end trace
79e484a9da539415 ]---

Re: kernel oops when trying to compile kernel on btrfs part

[Chris Mason]

On Thu, Nov 19, 2009 at 06:46:58PM +0530, pragnesh radadia wrote:
> I got following kernel oops when trying to compile kernel on btrfs
> partation on my laptop.

This is probably running out of space.  Could you please send along the
lines around line number 735 in fs/btrfs/inode.c?

-chris

Re: kernel oops when trying to compile kernel on btrfs part

[pragnesh radadia]

On Tue, Nov 24, 2009 at 6:53 AM, Chris Mason <chris.mason@oracle.com> w=
rote:
> On Thu, Nov 19, 2009 at 06:46:58PM +0530, pragnesh radadia wrote:
>> I got following kernel oops when trying to compile kernel on btrfs
>> partation on my laptop.
>
> This is probably running out of space. =A0Could you please send along=
 the
> lines around line number 735 in fs/btrfs/inode.c?
>
> -chris
>
code,
 712                 if (ret =3D=3D 0) {
 713                         extent_clear_unlock_delalloc(inode,
 714
&BTRFS_I(inode)->io_tree,
 715                                                      start, end,
NULL, 1, 1,
 716                                                      1, 1, 1, 1);
 717                         *nr_written =3D *nr_written +
 718                              (end - start + PAGE_CACHE_SIZE) /
PAGE_CACHE_SIZE;
 719                         *page_started =3D 1;
 720                         ret =3D 0;
 721                         goto out;
 722                 }
 723         }
 724
 725         BUG_ON(disk_num_bytes >
 726                btrfs_super_total_bytes(&root->fs_info->super_copy)=
);
 727
 728         btrfs_drop_extent_cache(inode, start, start + num_bytes - =
1, 0);
 729
 730         while (disk_num_bytes > 0) {
 731                 cur_alloc_size =3D min(disk_num_bytes,
root->fs_info->max_extent);
 732                 ret =3D btrfs_reserve_extent(trans, root, cur_allo=
c_size,
 733                                            root->sectorsize, 0, al=
loc_hint,
 734                                            (u64)-1, &ins, 1);
 735                 BUG_ON(ret);
 736
 737                 em =3D alloc_extent_map(GFP_NOFS);
 738                 em->start =3D start;
 739                 em->orig_start =3D em->start;
 740
 741                 ram_size =3D ins.offset;
-pragnesh
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