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SubjectBUG in ext4 with 2.6.37-rc1
The following BUG occurred today while compiling gcc, with 2.6.37-rc1+.
More precisely, commit 7fe19da4ca38 ("preempt: fix kernel build with
!CONFIG_BKL") with http://permalink.gmane.org/gmane.linux.nfs/36521
applied on top. It basically took out the whole system.

------------[ cut here ]------------
kernel BUG at /scratch_space/linux-2.6/fs/ext4/page-io.c:146!
invalid opcode: 0000 [#1] PREEMPT SMP
last sysfs file: /sys/devices/pci0000:00/0000:00:1d.7/usb8/8-3/8-3:1.0/uevent
CPU 0
Modules linked in: nls_iso8859_1 nls_cp437 vfat fat nfs nfs_acl bridge stp llc autofs4 nfsd lockd sunrpc exportfs ipv6 iptable_filter iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 ip_tables x_tables snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer snd soundcore snd_page_alloc sg evdev usb_storage ext2 ehci_hcd sr_mod cdrom loop tun acpi_cpufreq mperf arc4 ecb crypto_blkcipher cryptomgr aead crypto_algapi rt2800pci rt2800lib crc_ccitt rt2x00pci rt2x00lib mac80211 cfg80211 eeprom_93cx6 e1000e

Pid: 30058, comm: ranlib Not tainted 2.6.37-rc1-00004-g1c7d46a #60 WG43M/Aspire X3810
RIP: 0010:[<ffffffff81107409>] [<ffffffff81107409>] ext4_init_io_end+0x3c/0x72
RSP: 0018:ffff880016a4b788 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff880062e2abe0 RCX: 0000000000000000
RDX: ffffea0002398c88 RSI: ffff8800018c3948 RDI: ffff880016a4a000
RBP: ffff880016a4b798 R08: 0000000000000023 R09: 0000000000008000
R10: ffff88013beaace0 R11: ffff88013beaace0 R12: ffff8800018c3948
R13: ffff880016a4b918 R14: ffff880100cd5f30 R15: ffffea0002398c88
FS: 00002abaac327b20(0000) GS:ffff8800b7a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f573b7a8000 CR3: 000000008d3ed000 CR4: 00000000000406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process ranlib (pid: 30058, threadinfo ffff880016a4a000, task ffff880016b59640)
Stack:
ffff8800a59999c0 ffffea0002398c88 ffff880016a4b818 ffffffff811075b1
ffff88013e028000 ffff880016a4bc68 0000100016b59640 ffffea0002398c88
ffff8800a59999c0 ffff880062e2abe0 0000100000008000 0000000000000080
Call Trace:
[<ffffffff811075b1>] ext4_bio_write_page+0x172/0x307
[<ffffffff811033a7>] mpage_da_submit_io+0x2f9/0x37b
[<ffffffff811068d7>] mpage_da_map_and_submit+0x2cc/0x2e2
[<ffffffff811069b3>] mpage_add_bh_to_extent+0xc6/0xd5
[<ffffffff81106c66>] write_cache_pages_da+0x2a4/0x3ac
[<ffffffff81107044>] ext4_da_writepages+0x2d6/0x44d
[<ffffffff81087910>] do_writepages+0x1c/0x25
[<ffffffff810810a4>] __filemap_fdatawrite_range+0x4b/0x4d
[<ffffffff810815f5>] filemap_fdatawrite_range+0xe/0x10
[<ffffffff81122a2e>] jbd2_journal_begin_ordered_truncate+0x7b/0xa2
[<ffffffff8110615d>] ext4_evict_inode+0x57/0x24c
[<ffffffff810c14a3>] evict+0x22/0x92
[<ffffffff810c1a3d>] iput+0x212/0x249
[<ffffffff810bdf16>] dentry_iput+0xa1/0xb9
[<ffffffff810bdf6b>] d_kill+0x3d/0x5d
[<ffffffff810be613>] dput+0x13a/0x147
[<ffffffff810b990d>] sys_renameat+0x1b5/0x258
[<ffffffff81145f71>] ? _atomic_dec_and_lock+0x2d/0x4c
[<ffffffff810b2950>] ? cp_new_stat+0xde/0xea
[<ffffffff810b29c1>] ? sys_newlstat+0x2d/0x38
[<ffffffff810b99c6>] sys_rename+0x16/0x18
[<ffffffff81002a2b>] system_call_fastpath+0x16/0x1b
Code: e8 97 4c fa ff 49 89 c4 48 85 c0 74 4c 31 c0 b9 1a 01 00 00 4c 89 e7 f3 ab 48 89 df e8 1f 95 fb ff 49 89 44 24 10 48 85 c0 75 04 <0f> 0b eb fe 49 8d 44 24 40 49 c7 44 24 38 00 05 00 00 49 89 44
RIP [<ffffffff81107409>] ext4_init_io_end+0x3c/0x72
RSP <ffff880016a4b788>
---[ end trace ddc79adad95a6879 ]---

--
Nick Bowler, Elliptic Technologies (http://www.elliptictech.com/)


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