[Xen-devel] vmalloc_sync_all() patch problems?

["Christopher S. Aker" <caker@xxxxxxxxxxxx>]

4.1.2-rc3-pre @ 23159
3.0.4 + vmalloc_sync_all() patch

While running my Xen test suite:

BUG: unable to handle kernel paging request at bffffd68
IP: [<c102bb51>] vmalloc_sync_all+0x141/0x1e0
*pdpt = 0000000027d71027 *pde = 0000000000000000
Oops: 0000 [#1] SMP
Modules linked in: ebt_arp ip6t_rt ebt_mark ebt_limit ip6table_mangle 
xt_mark ebtable_nat ebtable_filter
Pid: 39, comm: xenwatch Not tainted 3.0.4-1 #1 Supermicro X8DTU/X8DTU
EIP: 0061:[<c102bb51>] EFLAGS: 00010283 CPU: 3
EIP is at vmalloc_sync_all+0x141/0x1e0
EAX: bffffd68 EBX: efe5a720 ECX: 00000008 EDX: 00000001
ESI: ea082a34 EDI: c1a73d68 EBP: eb1d9e80 ESP: eb1d9e4c
 DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0069
Process xenwatch (pid: 39, ti=eb1d8000 task=eb11b0c0 task.ti=eb1d8000)
Stack:
 2b048000 00000000 2b048000 00000000 fffff001 00000008 c0000d68 7bf85067
 f5a00000 00000018 ea254480 eb1d9f14 eb1d9f54 eb1d9e94 c10e5212 c10e35a0
 00000000 e7d3d600 eb1d9ee4 c1446275 eb1d9ea8 c13932c0 e7d3d600 00000011
Call Trace:
 [<c10e5212>] alloc_vm_area+0x42/0x60
 [<c10e35a0>] ? is_vmalloc_or_module_addr+0x50/0x50
 [<c1446275>] xen_blkif_map+0x35/0x1e0
 [<c13932c0>] ? xen_evtchn_do_upcall+0x20/0x30
 [<c1446a61>] frontend_changed+0x261/0x2d0
 [<c139852d>] xenbus_otherend_changed+0x7d/0x90
 [<c1398732>] frontend_changed+0x12/0x20
 [<c1396aa5>] xenwatch_thread+0x85/0x130
 [<c10625d0>] ? wake_up_bit+0x60/0x60
 [<c1396a20>] ? split+0xd0/0xd0
 [<c10621e4>] kthread+0x74/0x80
 [<c1062170>] ? kthread_worker_fn+0x160/0x160
 [<c16ca2b6>] kernel_thread_helper+0x6/0x10
Code: c1 89 c7 81 e7 00 f0 ff ff 03 7d e4 8b 17 89 55 e8 8b 4f 04 83 e2 
01 89 4d e0 0f 84 68 ff ff ff 8b 45 dc 25 00 f0 ff ff 03 45 e4 <8b> 08 
8b 50 04 f6 c1 01 89 55 dc 74 7a 8b 55 dc 89 c8 ff 15 14
EIP: [<c102bb51>] vmalloc_sync_all+0x141/0x1e0 SS:ESP 0069:eb1d9e4c
CR2: 00000000bffffd68
---[ end trace 486c192808e46938 ]---
INFO: rcu_sched_state detected stall on CPU 7 (t=60000 jiffies)
INFO: rcu_sched_state detected stall on CPU 7 (t=240030 jiffies)
... and so on

-Chris

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