[Xen-devel] Re: pvops bug

[Dulloor <dulloor@xxxxxxxxx>]

This bug message precedes the "soft lockup" bug message (mentioned below) - actual problem.

[ 1247.473865] BUG: unable to handle kernel paging request at c05dbd30
[ 1247.473877] IP: [<c0106e44>] xen_set_pte+0x74/0x90
[ 1247.473889] *pdpt = 000000006db54001
[ 1247.473895] Oops: 0003 [#1] SMP
[ 1247.473902] last sysfs file: /sys/devices/pci0000:00/0000:00:1f.3/modalias
[ 1247.473908] Modules linked in: <trimmed>
[ 1247.474113]
[ 1247.474118] Pid: 232, comm: kswapd0 Not tainted (2.6.30-rc6-tip #2) Precision WorkStation 390
[ 1247.474122] EIP: 0061:[<c0106e44>] EFLAGS: 00010202 CPU: 1
[ 1247.474127] EIP is at xen_set_pte+0x74/0x90
[ 1247.474131] EAX: 08f31063 EBX: 001322f8 ECX: 00000000 EDX: 00000000
[ 1247.474135] ESI: c05dbd30 EDI: c05dbd30 EBP: e2679d04 ESP: e2679cf0
[ 1247.474139]  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0069
[ 1247.474143] Process kswapd0 (pid: 232, ti=e2678000 task=e2665940 task.ti=e2678000)
[ 1247.474147] Stack:
[ 1247.474150]  08f31063 00000000 08f31063 00000063 c05dbd30 e2679d34 c012c84a 00000000
[ 1247.474168]  00000000 08f31063 00000000 f57ff000 000000a0 00000014 00000007 404a2000
[ 1247.474188]  c8acdf20 e2679d48 c01054db 00000163 80000000 00000000 e2679dac c01c77a9
[ 1247.474210] Call Trace:
[ 1247.474214]  [<c012c84a>] ? kmap_atomic_prot+0xfa/0x130
[ 1247.474222]  [<c01054db>] ? xen_kmap_atomic_pte+0x2b/0x40
[ 1247.474229]  [<c01c77a9>] ? page_check_address+0xd9/0x1e0
[ 1247.474238]  [<c01b46b6>] ? shrink_page_list+0x466/0x640
[ 1247.474245]  [<c01d896d>] ? mem_cgroup_del_lru_list+0x4d/0x70
[ 1247.474252]  [<c01c7972>] ? page_referenced_one+0x52/0x120
[ 1247.474259]  [<c01b35e3>] ? isolate_pages_global+0x93/0x210
[ 1247.474266]  [<c01c7d41>] ? page_referenced+0xe1/0x120
[ 1247.474272]  [<c01b3ed6>] ? shrink_active_list+0xf6/0x390
[ 1247.474279]  [<c01afed5>] ? get_dirty_limits+0x15/0x2e0
[ 1247.474287]  [<c01b5254>] ? shrink_zone+0x204/0x300
[ 1247.474294]  [<c01b58aa>] ? kswapd+0x55a/0x5a0
[ 1247.474301]  [<c01b3550>] ? isolate_pages_global+0x0/0x210
[ 1247.474308]  [<c0159620>] ? autoremove_wake_function+0x0/0x40
[ 1247.474315]  [<c01b5350>] ? kswapd+0x0/0x5a0
[ 1247.474321]  [<c015926c>] ? kthread+0x4c/0x80
[ 1247.474327]  [<c0159220>] ? kthread+0x0/0x80
[ 1247.474334]  [<c010aa77>] ? kernel_thread_helper+0x7/0x10
[ 1247.474341] Code: 8b 1d 0c e3 5d c0 83 05 04 e3 5d c0 01 e8 05 e7 01 00 83 e8 01 0f 94 c0 0f b6 c0 01 d8 a3 0c e3 5d c0 8b 45 f0 89 46 04 8b 45 ec <89> 06 eb b9 bf e0 e2 5d c0 31 c0 b9 33 00 00 00 f3 ab c6 05 ac
[ 1247.474473] EIP: [<c0106e44>] xen_set_pte+0x74/0x90 SS:ESP 0069:e2679cf0
[ 1247.474482] CR2: 00000000c05dbd30
[ 1247.474488] ---[ end trace d4532c03c80c2027 ]---
[ 1247.474493] note: kswapd0[232] exited with preempt_count 1

On Mon, Jun 22, 2009 at 3:35 AM, Dulloor <dulloor@xxxxxxxxx> wrote:

I hit the following bug when compiling the source code. I am booted into pvops (xen-tip/next). If this is not a known issue, I will look more into it.

-dulloor

[ 6947.111255] Pid: 27629, comm: cc1 Tainted: G      D    (2.6.30-rc6-tip #2) Precision WorkStation 390
[ 6947.111255] EIP: 0061:[<c03e1ea5>] EFLAGS: 00000297 CPU: 1
[ 6947.111255] EIP is at _spin_lock+0x15/0x20
[ 6947.111255] EAX: e02ed980 EBX: e02ed980 ECX: e0b812c0 EDX: 0000f3f2
[ 6947.111255] ESI: e0b810b0 EDI: 40000000 EBP: d0217ec4 ESP: d0217ec4
[ 6947.111255]  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0069
[ 6947.111255] CR0: 8005003b CR2: 4002b000 CR3: 08159000 CR4: 00002660
[ 6947.111255] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
[ 6947.111255] DR6: ffff0ff0 DR7: 00000400
[ 6947.111255] Call Trace:
[ 6947.111255]  [<c01c7e9d>] anon_vma_unlink+0x1d/0x70
[ 6947.111255]  [<c01be7be>] free_pgtables+0x4e/0xb0
[ 6947.111255]  [<c01c53a8>] exit_mmap+0xc8/0x150
[ 6947.111255]  [<c0140356>] mmput+0x36/0xa0
[ 6947.111255]  [<c0145914>] exit_mm+0xd4/0xf0
[ 6947.111255]  [<c03e209b>] ? _spin_lock_irq+0xb/0x30
[ 6947.111255]  [<c0145a40>] do_exit+0x110/0x6e0
[ 6947.111255]  [<c01c5732>] ? do_munmap+0x1e2/0x270
[ 6947.111255]  [<c0146040>] do_group_exit+0x30/0x90
[ 6947.111255]  [<c01460af>] sys_exit_group+0xf/0x20
[ 6947.111255]  [<c010a089>] syscall_call+0x7/0xb
[ 7012.611255] BUG: soft lockup - CPU#1 stuck for 61s! [cc1:27629]

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