---------- Forwarded message ----------
From: Amos Kong <kongjianjun@xxxxxxxxx>
Date: Tue, Sep 7, 2010 at 7:49 AM
Subject: Guest hangs when I do general operation.
To: 王箫 <sirouni@xxxxxxxxx>
kvm upstream: 43e413f7db1a4a90671dda0b1d6c1f8cb30673ed KVM: Whitespace
changes to remove differences wrt kvm-updates/2.6.37
qemu upstream: cb93bbdd7db92e50ff5e60a346b23df68acae46b Fix OpenBSD
linker warning
# ./x86_64-softmmu/qemu-system-x86_64 ~/win7-32.qcow2 -m 1024 -vnc :0
-usbdevice tablet -cpu qemu64 -snapshot -enable-kvm -bios pc-bios/bios.bin
Guest hangs when I do general operation.
It's fine when using upstream qemu-kvm. this problem only occurred
one time when I debug by gdb, after execute 'continue', guest runs
normally.
debug msg of (qemu + kvm)
(gdb) c
Continuing.
Program received signal SIGUSR2, User defined signal 2.
0x00007fc7d4d7bfb3 in select () at ../sysdeps/unix/syscall-template.S:82
82 ../sysdeps/unix/syscall-template.S: No such file or directory.
in ../sysdeps/unix/syscall-template.S
(gdb) bt
#0 0x00007fc7d4d7bfb3 in select () at ../sysdeps/unix/syscall-template.S:82
#1 0x00000000004270ea in qemu_aio_wait () at aio.c:193
#2 0x0000000000426475 in bdrv_read_em (bs=0x186a340,
sector_num=6343320, buf=0x7fc7c5a9b010 "RCRD(", nb_sectors=104) at
block.c:2432
#3 0x000000000043c437 in qcow_read (bs=0x1838680, start_sect=<value
optimized out>, cluster_offset=<value optimized out>, n_start=<value
optimized out>,
n_end=<value optimized out>) at block/qcow2-cluster.c:368
#4 copy_sectors (bs=0x1838680, start_sect=<value optimized out>,
cluster_offset=<value optimized out>, n_start=<value optimized out>,
n_end=<value optimized out>) at block/qcow2-cluster.c:406
#5 0x000000000043c69b in qcow2_alloc_cluster_link_l2 (bs=0x1838680,
m=0x1d5d798) at block/qcow2-cluster.c:689
#6 0x00000000004378d5 in qcow_aio_write_cb (opaque=0x1d5d700, ret=0)
at block/qcow2.c:566
#7 0x0000000000429c5d in posix_aio_process_queue (opaque=<value
optimized out>) at posix-aio-compat.c:459
#8 0x0000000000429d0c in posix_aio_read (opaque=0x183a250) at
posix-aio-compat.c:489
#9 0x000000000051fec6 in main_loop_wait (nonblocking=<value optimized
out>) at /home/devel/qemu/vl.c:1281
#10 0x00000000005209bd in main_loop (argc=0, argv=<value optimized
out>, envp=<value optimized out>) at /home/devel/qemu/vl.c:1332
#11 main (argc=0, argv=<value optimized out>, envp=<value optimized
out>) at /home/devel/qemu/vl.c:2995
---
kvm statistics
efer_reload 0 0
exits 8714404 0
fpu_reload 115538 0
halt_exits 66926 0
halt_wakeup 0 0
host_state_reload 2366344 0
hypercalls 0 0
insn_emulation 1848818 0
insn_emulation_fail 0 0
invlpg 662261 0
io_exits 1293800 0
irq_exits 531478 0
irq_injections 109588 0
irq_window 114236 0
largepages 0 0
mmio_exits 705388 0
mmu_cache_miss 355201 0
mmu_flooded 298554 0
mmu_pde_zapped 25705 0
mmu_pte_updated 241815 0
mmu_pte_write 15701676 0
mmu_recycled 546 0
mmu_shadow_zapped 527220 0
mmu_unsync 4203 0
nmi_injections 0 0
nmi_window 0 0
pf_fixed 3107522 0
pf_guest 631148 0
remote_tlb_flush 31032 0
request_irq 0 0
signal_exits 310597 0
tlb_flush 2164428 0
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