Re: [Xen-devel] Xen with dom0 pvops on ultra-recent "git tip" kernel on x86_64

[Adam Wendt <thelsdj@xxxxxxxxx>]

Here is kernel crash running pvops on x86-64 on 2.6.29-rc1:

[ 1396.821933] ------------[ cut here ]------------
[ 1396.822062] kernel BUG at arch/x86/xen/enlighten.c:659!
[ 1396.822179] invalid opcode: 0000 [#1] SMP
[ 1396.822255] last sysfs file: /sys/devices/pci0000:00/0000:00:1f.2/host1/target1:0:0/1:0:0:0/scsi_level
[ 1396.822255] CPU 1
[ 1396.822255] Modules linked in: netconsole [last unloaded: netconsole]
[ 1396.822255] Pid: 372, comm: kswapd0 Not tainted 2.6.29-rc1-tip #9
[ 1396.822255] RIP: e030:[<ffffffff8102375d>]  [<ffffffff8102375d>] xen_flush_tlb_others+0x1a/0xbb
[ 1396.822255] RSP: e02b:ffff88001f72fb50  EFLAGS: 00010202
[ 1396.822255] RAX: 0000000000000001 RBX: ffff88001e4363c0 RCX: ffffe200005fb1e0
[ 1396.822255] RDX: 00002ab00db41000 RSI: ffff88001e4363c0 RDI: ffff88001e436668
[ 1396.822255] RBP: ffff88001e436668 R08: ffffffff814b045f R09: ffff88001e436668
[ 1396.822255] R10: ffffffff8104fb85 R11: ffffffff8112280c R12: 00002ab00db41000
[ 1396.822255] R13: ffff88001e4363c0 R14: ffff88001f72fc1c R15: 0000000000000000
[ 1396.822255] FS:  00002b065606d6f0(0000) GS:ffff88001fce3580(0000) knlGS:0000000000000000
[ 1396.822255] CS:  e033 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 1396.822255] CR2: 00000000028ef000 CR3: 0000000001001000 CR4: 0000000000002660
[ 1396.822255] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1396.822255] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 1396.822255] Process kswapd0 (pid: 372, threadinfo ffff88001f72e000, task ffff88001f47c410)
[ 1396.822255] Stack:
[ 1396.822255]  0000000000000001 ffffffff811d9d4b ffffe200005fb1e0 ffffffff811d9dbc
[ 1396.822255]  ffff88001e436668 00002ab00db41000 ffff88001e4363c0 ffffffff8103aa3a
[ 1396.822255]  00000000ffffffff 00002ab00db41000 ffff88001b5f98f0 ffffffff8104aa4f
[ 1396.822255] Call Trace:
[ 1396.822255]  [<ffffffff811d9d4b>] ? cpumask_next+0x19/0x1b
[ 1396.822255]  [<ffffffff811d9dbc>] ? cpumask_any_but+0x1e/0x2b
[ 1396.822255]  [<ffffffff8103aa3a>] ? flush_tlb_page+0x6c/0x72
[ 1396.822255]  [<ffffffff8104aa4f>] ? ptep_clear_flush_young+0x20/0x27
[ 1396.822255]  [<ffffffff810b9810>] ? page_referenced_one+0x66/0xca
[ 1396.822255]  [<ffffffff810ba3e3>] ? page_referenced+0x72/0xe9
[ 1396.822255]  [<ffffffff810a90b3>] ? shrink_list+0x454/0x476
[ 1396.822255]  [<ffffffff810a84d9>] ? shrink_active_list+0x17f/0x35d
[ 1396.822255]  [<ffffffff810a6dfa>] ? __pagevec_release+0x19/0x22
[ 1396.822255]  [<ffffffff810a86a5>] ? shrink_active_list+0x34b/0x35d
[ 1396.822255]  [<ffffffff810a93cc>] ? shrink_zone+0x2f7/0x30e
[ 1396.822255]  [<ffffffff814b0563>] ? _spin_unlock_irqrestore+0x14/0x17
[ 1396.822255]  [<ffffffff810aa1ae>] ? kswapd+0x34f/0x48f
[ 1396.822255]  [<ffffffff810a7bcb>] ? isolate_pages_global+0x0/0x1a7
[ 1396.822255]  [<ffffffff8106c92f>] ? autoremove_wake_function+0x0/0x2e
[ 1396.822255]  [<ffffffff8104eab7>] ? __wake_up_common+0x3f/0x72
[ 1396.822255]  [<ffffffff810a9e5f>] ? kswapd+0x0/0x48f
[ 1396.822255]  [<ffffffff810a9e5f>] ? kswapd+0x0/0x48f
[ 1396.822255]  [<ffffffff8106c7de>] ? kthread+0x47/0x75
[ 1396.822255]  [<ffffffff8102b2ba>] ? child_rip+0xa/0x20
[ 1396.822255]  [<ffffffff8102abad>] ? retint_restore_args+0x5/0x20
[ 1396.822255]  [<ffffffff8102b2b0>] ? child_rip+0x0/0x20
[ 1396.822255] Code: 00 00 00 48 c7 40 10 00 00 00 00 48 83 c4 28 eb 99 41 54 49 89 d4 55 48 89 fd 53 48 89 f3 48 83 ec 20 e8 2f ff ff ff 84 c0 74 04 <0f> 0b eb fe 48 85 db 75 04 0f 0b eb fe bf 20 00 00 00 e8 82 fe
[ 1396.822255] RIP  [<ffffffff8102375d>] xen_flush_tlb_others+0x1a/0xbb
[ 1396.822255]  RSP <ffff88001f72fb50>
[ 1396.833108] ---[ end trace b1dc69f7f3b7ebee ]---
[ 1396.833316] kswapd0 used greatest stack depth: 4520 bytes left

Let me know if there's anything else I can do to help test this.

Adam
Adam Wendt Consulting

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