Hi,
I tried to run PREEMPT_RT patch under XEN, but running into some problem.
My kernel is 3.4.3 with -r11 patch. XEN is 4.1.2. The kernel is running
file as dom0. But as a Paravirtual (PV) domU, the system crashes normal
when there is network traffic. kernel message indicates is
kernel/rtmutex_common.h:75, which is,
BUG_ON(w->lock != lock);
Is this a known problem?
Thanks!
Dong
PS. Here is the kernel message
[ 144.871050] kernel BUG at kernel/rtmutex_common.h:75!
[ 144.871052] invalid opcode: 0000 [#1] PREEMPT SMP
[ 144.871054] CPU 0
[ 144.871054] Modules linked in: 8021q garp stp llc sunrpc binfmt_misc
uinput coretemp crc32c_intel microcode xen_netfront pcspkr x\
en_blkfront [last unloaded: scsi_wait_scan]
[ 144.871060]
[ 144.871062] Pid: 3, comm: ksoftirqd/0 Not tainted
3.4.3-1.el6.alu_preempt_rt.x86_64-rt11 #1
[ 144.871064] RIP: e030:[<ffffffff810bb538>] [<ffffffff810bb538>]
wakeup_next_waiter+0x98/0xa0
[ 144.871071] RSP: e02b:ffff88003e1f1dc0 EFLAGS: 00010096
[ 144.871072] RAX: ffff88003fc00068 RBX: ffff88003fc0c360 RCX:
0000000000000001
[ 144.871073] RDX: 0000000000003978 RSI: 0000000000000000 RDI:
ffffffff81cf5368
[ 144.871075] RBP: ffff88003e1f1df0 R08: 0000000000000001 R09:
0000000000000000
[ 144.871076] R10: 0000000000000004 R11: 0000000000000000 R12:
ffff88003e1ee788
[ 144.871077] R13: ffffffff81cf5350 R14: ffff88003e1ee0c0 R15:
ffff88003fc00068
[ 144.871081] FS: 00007fc492e307c0(0000) GS:ffff88003fc00000(0000)
knlGS:0000000000000000
[ 144.871083] CS: e033 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 144.871084] CR2: 0000003d8be2c0f0 CR3: 00000000397bf000 CR4:
0000000000002660
[ 144.871086] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 144.871088] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
0000000000000400
[ 144.871089] Process ksoftirqd/0 (pid: 3, threadinfo ffff88003e1f0000,
task ffff88003e1ee0c0)
[ 144.871090] Stack:
[ 144.871091] ffff88003e1f0000 ffff88003fc0c360 0000000000000000
000000000000c360
[ 144.871094] ffff88003e1ee0c0 ffff88003e1f0010 ffff88003e1f1e10
ffffffff81611e18
[ 144.871096] 0000000000000000 ffff88003fc0c360 ffff88003e1f1e20
ffffffff81612419
[ 144.871097] Call Trace:
[ 144.871102] [<ffffffff81611e18>] rt_spin_lock_slowunlock+0x28/0xa0
[ 144.871105] [<ffffffff81612419>] rt_spin_unlock+0x29/0x40
[ 144.871108] [<ffffffff81064515>] __thread_do_softirq+0xe5/0x150
[ 144.871110] [<ffffffff81064669>] run_ksoftirqd+0xe9/0x1e0
[ 144.871112] [<ffffffff81064580>] ? __thread_do_softirq+0x150/0x150
[ 144.871114] [<ffffffff81064580>] ? __thread_do_softirq+0x150/0x150
[ 144.871117] [<ffffffff8108092e>] kthread+0x9e/0xb0
[ 144.871119] [<ffffffff8108e4f9>] ? finish_task_switch+0x49/0xf0
[ 144.871122] [<ffffffff8161b064>] kernel_thread_helper+0x4/0x10
[ 144.871124] [<ffffffff81612b7c>] ? retint_restore_args+0x5/0x6
[ 144.871126] [<ffffffff8161b060>] ? gs_change+0x13/0x13
[ 144.871127] Code: c0 0f b6 c0 48 89 43 18 e8 a6 73 55 00 4c 89 ef e8
4e ff ff ff 48 8b 5d d8 4c 8b 65 e0 4c 8b 6d e8 4c 8b 75 f0 \
4c 8b 7d f8 c9 c3 <0f> 0b eb fe 0f 1f 40 00 55 48 89 e5 66 83 07 01 bf
01 00 00 00
[ 144.871140] RIP [<ffffffff810bb538>] wakeup_next_waiter+0x98/0xa0
[ 144.871142] RSP <ffff88003e1f1dc0>
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