[Xen-bugs] [Bug 129] New: x86_64 - Kernel BUG at "fs/fs-writeback.c":363

[dbarrera@xxxxxxxxxx]

http://bugzilla.xensource.com/cgi-bin/bugzilla/show_bug.cgi?id=129

           Summary: x86_64 - Kernel BUG at "fs/fs-writeback.c":363
           Product: Xen
           Version: unstable
          Platform: x86-64
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Hypervisor
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: dbarrera@xxxxxxxxxx
                CC: hohnbaum@xxxxxxxxxx


FC4 based Dom0, x86_64. Had a DomU up but not running any workloads. File system
is ext3.

I was editing a text file, when i saw a message appear on the console:
kernel: invalid operand: 0000 [1]

dmesg on Dom0 shows this trace:

----------- [cut here ] --------- [please bite here ] ---------
Kernel BUG at "fs/fs-writeback.c":363
invalid operand: 0000 [1]
CPU 0
Modules linked in: video thermal processor fan button battery ac
Pid: 131, comm: pdflush Not tainted 2.6.12-xen0
RIP: e030:[<ffffffff8018b399>] <ffffffff8018b399>{sync_sb_inodes+489}
RSP: e02b:ffff88000f079de8  EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffff88000d2d9800 RCX: ffff88000bbba100
RDX: ffff88000b128000 RSI: ffff880008038c80 RDI: ffff88000b008ed0
RBP: ffff880008038c70 R08: 0000000000000003 R09: 0000000000000040
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88000b008ed0
R13: ffff88000f079e48 R14: ffff88000d2d98e8 R15: 000000010000083c
FS:  00002aaaaaabcf20(0000) GS:ffffffff8053b200(0000) knlGS:0000000000000000
CS:  e033 DS: 0000 ES: 0000
Process pdflush (pid: 131, threadinfo ffff88000f078000, task ffff88000f0262b0)
Stack: 0000000000000032 ffff88000d2d9800 ffff88000d2d9878 ffff88000f079e48
       ffffffff801503a0 ffffffff8013f850 ffff88000f8067d0 ffffffff8018b63f
       00000000000018b8 0000000000000000
Call Trace:<ffffffff801503a0>{pdflush+0}
<ffffffff8013f850>{keventd_create_kthread+0}
       <ffffffff8018b63f>{writeback_inodes+95} 
<ffffffff8014fa16>{wb_kupdate+150}
       <ffffffff801504cf>{pdflush+303} <ffffffff8014f980>{wb_kupdate+0}
       <ffffffff8013fa7d>{kthread+205} <ffffffff8010e59f>{child_rip+8}
       <ffffffff8013f850>{keventd_create_kthread+0} 
<ffffffff8013f9b0>{kthread+0}
       <ffffffff8010e597>{child_rip+0}

Code: 0f 0b b0 63 3e 80 ff ff ff ff 6b 01 48 89 ef e8 b3 71 ff ff
RIP <ffffffff8018b399>{sync_sb_inodes+489} RSP <ffff88000f079de8>



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