On Mon, 2008-07-21 at 23:32 -0400, David Woodhouse wrote:
> Untested but ObviouslyCorrect™. Now that I can load the module, I hit a
> BUG() immediately -- but I don't think it's caused by this patch. qv.
Current progs-unstable and kernel-unstable. I created a 512MiB file and
ran mkfs.btrfs on it, on the current Fedora kernel:
shinybook /shiny/git/btrfs-progs-unstable $ dd if=/dev/zero of=/home/dwmw2/btrfs.test bs=$((1024*1024)) count=512
512+0 records in
512+0 records out
536870912 bytes (537 MB) copied, 37.6313 s, 14.3 MB/s
shinybook /shiny/git/btrfs-progs-unstable $ ./mkfs.btrfs /home/dwmw2/btrfs.test fs created label (null) on /home/dwmw2/btrfs.test
nodesize 4096 leafsize 4096 sectorsize 4096 size 512.00MB
shinybook /shiny/git/btrfs-progs-unstable $ sudo mount -tbtrfs -oloop /home/dwmw2/btrfs.test /mnt/spare
shinybook /shiny/git/btrfs-progs-unstable $ dmesg | tail -61
loop: module loaded
device fsid 1119bbc059164661-acafbb6be44e5929 devid 1 transid 12 /dev/loop0
------------[ cut here ]------------
kernel BUG at /shiny/git/btrfs-kernel-unstable/extent_map.c:275!
Oops: Exception in kernel mode, sig: 5 [#1]
PowerMac
Modules linked in: loop btrfs libcrc32c b43legacy mac80211 rndis_wlan rndis_host cdc_ether usbnet mii cdc_acm airport bridge bnep orinoco_cs orinoco hermes hidp udf radeon drm rfkill_input hci_usb rfcomm l2cap bluetooth autofs4 sunrpc ipv6 dm_mirror dm_mod therm_adt746x arc4 ecb crypto_blkcipher snd_aoa_i2sbus rfkill cfg80211 input_polldev snd_powermac snd_seq_dummy pmac_zilog snd_seq_oss snd_seq_midi_event snd_seq ide_cd_mod cdrom snd_seq_device sungem snd_pcm_oss snd_mixer_oss sungem_phy snd_pcm firewire_ohci firewire_core crc_itu_t snd_timer snd_page_alloc snd soundcore snd_aoa_soundbus ssb ext3 jbd mbcache uhci_hcd ohci_hcd ehci_hcd [last unloaded: b43legacy]
NIP: f29b6b2c LR: f29cc9f8 CTR: c0090778
REGS: c671dbf0 TRAP: 0700 Tainted: P (2.6.25.10-86.fc9.ppc)
MSR: 00029032 <EE,ME,IR,DR> CR: 24044448 XER: 00000000
TASK = c65736e0[25115] 'mount' THREAD: c671c000
GPR00: 00000001 c671dca0 c65736e0 e7b9e108 00400000 00000000 00000000 00000000
GPR08: 00000001 00000000 00004000 00004000 00000000 20029a70 00000000 bfcac591
GPR16: 20024880 20024870 bfcac56d e7b9e108 ec94b3c0 ec908400 e7b9f588 ed473200
GPR24: 00000000 e7b9e108 e1109ab8 00000000 00000000 00000001 00000000 00000000
NIP [f29b6b2c] lookup_extent_mapping+0x48/0x350 [btrfs]
LR [f29cc9f8] read_one_chunk+0xa0/0x2f0 [btrfs]
Call Trace:
[c671dca0] [00001000] 0x1000 (unreliable)
[c671dcd0] [f29cc9f8] read_one_chunk+0xa0/0x2f0 [btrfs]
[c671dd20] [f29cd180] btrfs_read_sys_array+0x180/0x200 [btrfs]
[c671dd70] [f29a7b40] open_ctree+0x620/0x928 [btrfs]
[c671ddb0] [f2982334] btrfs_get_sb+0x224/0x3dc [btrfs]
[c671de20] [c00b035c] vfs_kern_mount+0xa0/0x138
[c671de50] [c00b0444] do_kern_mount+0x40/0xf4
[c671de70] [c00c7f38] do_new_mount+0x6c/0xb8
[c671de90] [c00c8f1c] do_mount+0x1c8/0x1f4
[c671df10] [c00c8fd8] sys_mount+0x90/0xd8
[c671df40] [c00139dc] ret_from_syscall+0x0/0x38
--- Exception: c01 at 0x1fea3c54
LR = 0x20004fa8
Instruction dump:
7f87f114 90010034 7c791b78 7f85e040 419d0014 7f85e000 40be0014 7f86e840
409d000c 3b80ffff 3ba0ffff 38000001 <0f000000> 80790004 2f830000 419e006c
---[ end trace 83a08bddd47794a5 ]---
BUG: sleeping function called from invalid context at kernel/rwsem.c:21
in_atomic():0, irqs_disabled():1
Call Trace:
[c671da10] [c0008ddc] show_stack+0x4c/0x180 (unreliable)
[c671da60] [c00346d4] __might_sleep+0xc8/0xd8
[c671da70] [c02ecc48] down_read+0x24/0x5c
[c671da80] [c0069934] acct_collect+0x38/0x15c
[c671daa0] [c003c9a4] do_exit+0x1c4/0x5a4
[c671dad0] [c0011e88] kernel_bad_stack+0x0/0x4c
[c671daf0] [c0012040] _exception+0x58/0x154
[c671dbe0] [c001403c] ret_from_except_full+0x0/0x4c
--- Exception: 700 at lookup_extent_mapping+0x48/0x350 [btrfs]
LR = read_one_chunk+0xa0/0x2f0 [btrfs]
[c671dca0] [00001000] 0x1000 (unreliable)
[c671dcd0] [f29cc9f8] read_one_chunk+0xa0/0x2f0 [btrfs]
[c671dd20] [f29cd180] btrfs_read_sys_array+0x180/0x200 [btrfs]
[c671dd70] [f29a7b40] open_ctree+0x620/0x928 [btrfs]
[c671ddb0] [f2982334] btrfs_get_sb+0x224/0x3dc [btrfs]
[c671de20] [c00b035c] vfs_kern_mount+0xa0/0x138
[c671de50] [c00b0444] do_kern_mount+0x40/0xf4
[c671de70] [c00c7f38] do_new_mount+0x6c/0xb8
[c671de90] [c00c8f1c] do_mount+0x1c8/0x1f4
[c671df10] [c00c8fd8] sys_mount+0x90/0xd8
[c671df40] [c00139dc] ret_from_syscall+0x0/0x38
--- Exception: c01 at 0x1fea3c54
LR = 0x20004fa8
shinybook /shiny/git/btrfs-kernel-unstable #
--
David Woodhouse Open Source Technology Centre
David.Woodhouse@xxxxxxxxx Intel Corporation
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