| |
|
 |
|
 |
|
|
|
| |
|
|
xen-devel
[Xen-devel] Linux Guest Crash on stress test of memory sharing
Hi:
Follow George's suggestion to summit the bug in this new thread.
Start 24 linux HVMS on a physical host, each of them reboot through "xm reboot" every 30minutes.
After several hours, some of the HVM will crash.
All of the crash HVM are stopped during booting.
The bug still exists even I forbid page sharing by cheating tapdisk that xc_memshr_nominate_gref()
return failure. No bug if memory sharing is disabled.
(This means only mem_sharing_nominate_page() are called, and in mem_sharing_nominate_page()
page type is set to p2m_shared, so later it needs to be unshared when someone try to use it)
I remember there is a call routine in memory sharing,
hvm_hap_nested_page_fault()->mem_sharing_unshare_page()
compare to the crash dump, it might indicates some connections.
DomU kernel is from ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/kernel-2.6.18-164.el5.src.rpm
Xen version: 4.0.0
crash dump stack :
crash> bt -l
PID: 2422 TASK: ffff810013b40860 CPU: 1 COMMAND: "setfont"
#0 [ffff810012cef900] xen_panic_event at ffffffff88001d28
#1 [ffff810012cef920] notifier_call_chain at ffffffff80066eaa
/usr/src/redhat/BUILD/kernel-2.6.18/linux-2.6.18.x86_64/kernel/sys.c: 146
#2 [ffff810012cef940] panic at ffffffff8009094a
/usr/src/redhat/BUILD/kernel-2.6.18/linux-2.6.18.x86_64/kernel/panic.c: 101
#3 [ffff810012cefa30] oops_end at ffffffff80064fca
/usr/src/redhat/BUILD/kernel-2.6.18/linux-2.6.18.x86_64/arch/x86_64/kernel/traps.c: 539
#4 [ffff810012cefa40] do_page_fault at ffffffff80066dc0
/usr/src/redhat/BUILD/kernel-2.6.18/linux-2.6.18.x86_64/arch/x86_64/mm/fault.c: 591
#5 [ffff810012cefb30] error_exit at ffffffff8005dde9
[exception RIP: vgacon_do_font_op+435]
RIP: ff
ffffff8005162d RSP: ffff810012cefbe8 RFLAGS: 00010287
RAX: ffff8100000a6000 RBX: ffffffff804b3740 RCX: ffff8100000a4ae0
RDX: ffff810012d16ae1 RSI: ffff810012d14000 RDI: ffffffff803244c4
RBP: ffff810012d14000 R8: d0d6999996000000 R9: 0000009090b0b0ff
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004
R13: 0000000000000001 R14: 0000000000000001 R15: 000000000000000e
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
#6 [ffff810012cefc20] vgacon_font_set at ffffffff8016bec5
/usr/src/redhat/BUILD/kernel-2.6.18/linux-2.6.18.x86_64/drivers/video/console/vgacon.c: 1238
#7 [ffff810012cefc60] con_font_op at ffffffff801aa86b
/usr/src/redhat/BUILD/kernel-2.6.18/linux-2.6.18.x86_64/drivers/char
/vt.c: 3645
#8 [ffff810012cefcd0] vt_ioctl at ffffffff801a5af4
/usr/src/redhat/BUILD/kernel-2.6.18/linux-2.6.18.x86_64/drivers/char/vt_ioctl.c: 965
#9 [ffff810012cefd70] tty_ioctl at ffffffff80038a2c
/usr/src/redhat/BUILD/kernel-2.6.18/linux-2.6.18.x86_64/drivers/char/tty_io.c: 3340
#10 [ffff810012cefeb0] do_ioctl at ffffffff800420d9
/usr/src/redhat/BUILD/kernel-2.6.18/linux-2.6.18.x86_64/fs/ioctl.c: 39
#11 [ffff810012cefed0] vfs_ioctl at ffffffff800302ce
/usr/src/redhat/BUILD/kernel-2.6.18/linux-2.6.18.x86_64/fs/ioctl.c: 500
#12 [ffff810012ceff40] sys_ioctl at ffffffff8004c766
/usr/src/redhat/BUILD/kernel-2.6.18/linux-2.6.18.x86_64/fs/ioctl.c: 520
#13 [ffff810012ceff80] tracesys at ffffffff8005d28d (via system_call)
RIP: 00000039294cc557 RSP: 00007fff1a57ed98 RFLAGS: 00000246
RAX: f
fffffffffffffda RBX: ffffffff8005d28d RCX: ffffffffffffffff
RDX: 00007fff1a57edb0 RSI: 0000000000004b72 RDI: 0000000000000003
RBP: 000000001e33dab0 R8: 0000000000000010 R9: 0000000000800000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000010
R13: 0000000000000200 R14: 0000000000000008 R15: 0000000000000008
ORIG_RAX: 0000000000000010 CS: 0033 SS: 002b
|
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
|
|
|
| |
|
Home