From: Peter Lieven <pl@kamp.de>
To: Paolo Bonzini <pbonzini@redhat.com>,
Kevin Wolf <kwolf@redhat.com>,
Stefan Hajnoczi <stefanha@gmail.com>
Cc: qemu-devel <qemu-devel@nongnu.org>, qemu block <qemu-block@nongnu.org>
Subject: Re: [Qemu-devel] [Qemu-block] RFC cdrom in own thread?
Date: Thu, 18 Jun 2015 09:03:39 +0200 [thread overview]
Message-ID: <55826D4B.3000703@kamp.de> (raw)
In-Reply-To: <55826C49.2030605@redhat.com>
Am 18.06.2015 um 08:59 schrieb Paolo Bonzini:
>
> On 18/06/2015 08:39, Peter Lieven wrote:
>> It seems like the mainloop is waiting here:
>>
>> #0 0x00007ffff606c89c in __lll_lock_wait ()
>> from /lib/x86_64-linux-gnu/libpthread.so.0
>> No symbol table info available.
>> #1 0x00007ffff6068065 in _L_lock_858 ()
>> from /lib/x86_64-linux-gnu/libpthread.so.0
>> No symbol table info available.
>> #2 0x00007ffff6067eba in pthread_mutex_lock ()
>> from /lib/x86_64-linux-gnu/libpthread.so.0
>> No symbol table info available.
>> #3 0x00005555559f2557 in qemu_mutex_lock (mutex=0x555555ed6d40)
>> at util/qemu-thread-posix.c:76
>> err = 0
>> __func__ = "qemu_mutex_lock"
>> #4 0x00005555556306ef in qemu_mutex_lock_iothread ()
>> at /usr/src/qemu-2.2.0/cpus.c:1123
>> No locals.
> This means the VCPU is busy with some synchronous activity---maybe a
> bdrv_aio_cancel?
Here is what the other threads are doing (dropped VNC thread):
Thread 3 (Thread 0x7ffff4d4f700 (LWP 2637)):
#0 0x00007ffff606c89c in __lll_lock_wait ()
from /lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#1 0x00007ffff6068065 in _L_lock_858 ()
from /lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#2 0x00007ffff6067eba in pthread_mutex_lock ()
from /lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#3 0x00005555559f2557 in qemu_mutex_lock (mutex=0x555555ed6d40)
at util/qemu-thread-posix.c:76
err = 0
__func__ = "qemu_mutex_lock"
#4 0x00005555556306ef in qemu_mutex_lock_iothread ()
at /usr/src/qemu-2.2.0/cpus.c:1123
No locals.
#5 0x000055555564b9ac in kvm_cpu_exec (cpu=0x5555563cb870)
at /usr/src/qemu-2.2.0/kvm-all.c:1770
run = 0x7ffff7ee2000
ret = 65536
run_ret = -4
#6 0x00005555556301dc in qemu_kvm_cpu_thread_fn (arg=0x5555563cb870)
at /usr/src/qemu-2.2.0/cpus.c:953
cpu = 0x5555563cb870
r = 65536
#5 0x00007ffff5d9338d in clone () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#6 0x0000000000000000 in ?? ()
No symbol table info available.
Thread 3 (Thread 0x7ffff4d4f700 (LWP 2637)):
#0 0x00007ffff606c89c in __lll_lock_wait ()
from /lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#1 0x00007ffff6068065 in _L_lock_858 ()
from /lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#2 0x00007ffff6067eba in pthread_mutex_lock ()
from /lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#3 0x00005555559f2557 in qemu_mutex_lock (mutex=0x555555ed6d40)
at util/qemu-thread-posix.c:76
err = 0
__func__ = "qemu_mutex_lock"
#4 0x00005555556306ef in qemu_mutex_lock_iothread ()
at /usr/src/qemu-2.2.0/cpus.c:1123
No locals.
#5 0x000055555564b9ac in kvm_cpu_exec (cpu=0x5555563cb870)
at /usr/src/qemu-2.2.0/kvm-all.c:1770
run = 0x7ffff7ee2000
ret = 65536
run_ret = -4
#6 0x00005555556301dc in qemu_kvm_cpu_thread_fn (arg=0x5555563cb870)
at /usr/src/qemu-2.2.0/cpus.c:953
cpu = 0x5555563cb870
r = 65536
#7 0x00007ffff6065e9a in start_thread ()
from /lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#8 0x00007ffff5d9338d in clone () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#9 0x0000000000000000 in ?? ()
No symbol table info available.
Thread 2 (Thread 0x7ffff5550700 (LWP 2636)):
#0 0x00007ffff5d87aa3 in ppoll () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1 0x0000555555955d91 in qemu_poll_ns (fds=0x5555563889c0, nfds=3,
timeout=4999424576) at qemu-timer.c:326
ts = {tv_sec = 4, tv_nsec = 999424576}
tvsec = 4
#2 0x0000555555956feb in aio_poll (ctx=0x5555563528e0, blocking=true)
at aio-posix.c:231
node = 0x0
was_dispatching = false
ret = 1
progress = false
#3 0x000055555594aeed in bdrv_prwv_co (bs=0x55555637eae0, offset=4292007936,
qiov=0x7ffff554f760, is_write=false, flags=0) at block.c:2699
aio_context = 0x5555563528e0
co = 0x5555563888a0
rwco = {bs = 0x55555637eae0, offset = 4292007936,
qiov = 0x7ffff554f760, is_write = false, ret = 2147483647, flags = 0}
#4 0x000055555594afa9 in bdrv_rw_co (bs=0x55555637eae0, sector_num=8382828,
buf=0x7ffff44cc800 "(", nb_sectors=4, is_write=false, flags=0)
at block.c:2722
qiov = {iov = 0x7ffff554f780, niov = 1, nalloc = -1, size = 2048}
iov = {iov_base = 0x7ffff44cc800, iov_len = 2048}
from /lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#8 0x00007ffff5d9338d in clone () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#9 0x0000000000000000 in ?? ()
No symbol table info available.
Thread 2 (Thread 0x7ffff5550700 (LWP 2636)):
#0 0x00007ffff5d87aa3 in ppoll () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1 0x0000555555955d91 in qemu_poll_ns (fds=0x5555563889c0, nfds=3,
timeout=4999424576) at qemu-timer.c:326
ts = {tv_sec = 4, tv_nsec = 999424576}
tvsec = 4
#2 0x0000555555956feb in aio_poll (ctx=0x5555563528e0, blocking=true)
at aio-posix.c:231
node = 0x0
was_dispatching = false
ret = 1
progress = false
#3 0x000055555594aeed in bdrv_prwv_co (bs=0x55555637eae0, offset=4292007936,
qiov=0x7ffff554f760, is_write=false, flags=0) at block.c:2699
aio_context = 0x5555563528e0
co = 0x5555563888a0
rwco = {bs = 0x55555637eae0, offset = 4292007936,
qiov = 0x7ffff554f760, is_write = false, ret = 2147483647, flags = 0}
#4 0x000055555594afa9 in bdrv_rw_co (bs=0x55555637eae0, sector_num=8382828,
buf=0x7ffff44cc800 "(", nb_sectors=4, is_write=false, flags=0)
at block.c:2722
qiov = {iov = 0x7ffff554f780, niov = 1, nalloc = -1, size = 2048}
iov = {iov_base = 0x7ffff44cc800, iov_len = 2048}
#5 0x000055555594b008 in bdrv_read (bs=0x55555637eae0, sector_num=8382828,
buf=0x7ffff44cc800 "(", nb_sectors=4) at block.c:2730
No locals.
#6 0x000055555599acef in blk_read (blk=0x555556376820, sector_num=8382828,
buf=0x7ffff44cc800 "(", nb_sectors=4) at block/block-backend.c:404
No locals.
#7 0x0000555555833ed2 in cd_read_sector (s=0x555556408f88, lba=2095707,
buf=0x7ffff44cc800 "(", sector_size=2048) at hw/ide/atapi.c:116
ret = 32767
#8 0x0000555555834202 in ide_atapi_cmd_reply_end (s=0x555556408f88)
at hw/ide/atapi.c:190
byte_count_limit = 21845
size = 1801980
ret = 0
#9 0x0000555555834657 in ide_atapi_cmd_read_pio (s=0x555556408f88,
lba=2095707, nb_sectors=16, sector_size=2048) at hw/ide/atapi.c:279
No locals.
#10 0x0000555555834b25 in ide_atapi_cmd_read (s=0x555556408f88, lba=2095707,
nb_sectors=16, sector_size=2048) at hw/ide/atapi.c:393
No locals.
#11 0x00005555558358ed in cmd_read (s=0x555556408f88, buf=0x7ffff44cc800 "(")
at hw/ide/atapi.c:824
nb_sectors = 16
lba = 2095707
#12 0x0000555555836373 in ide_atapi_cmd (s=0x555556408f88)
at hw/ide/atapi.c:1152
buf = 0x7ffff44cc800 "("
#13 0x00005555558323e1 in ide_data_writew (opaque=0x555556408f08, addr=368,
val=0) at hw/ide/core.c:2020
bus = 0x555556408f08
s = 0x555556408f88
p = 0x7ffff44cc80c "IHDR"
buf=0x7ffff44cc800 "(", nb_sectors=4) at block.c:2730
No locals.
#6 0x000055555599acef in blk_read (blk=0x555556376820, sector_num=8382828,
buf=0x7ffff44cc800 "(", nb_sectors=4) at block/block-backend.c:404
No locals.
#7 0x0000555555833ed2 in cd_read_sector (s=0x555556408f88, lba=2095707,
buf=0x7ffff44cc800 "(", sector_size=2048) at hw/ide/atapi.c:116
ret = 32767
#8 0x0000555555834202 in ide_atapi_cmd_reply_end (s=0x555556408f88)
at hw/ide/atapi.c:190
byte_count_limit = 21845
size = 1801980
ret = 0
#9 0x0000555555834657 in ide_atapi_cmd_read_pio (s=0x555556408f88,
lba=2095707, nb_sectors=16, sector_size=2048) at hw/ide/atapi.c:279
No locals.
#10 0x0000555555834b25 in ide_atapi_cmd_read (s=0x555556408f88, lba=2095707,
nb_sectors=16, sector_size=2048) at hw/ide/atapi.c:393
No locals.
#11 0x00005555558358ed in cmd_read (s=0x555556408f88, buf=0x7ffff44cc800 "(")
at hw/ide/atapi.c:824
nb_sectors = 16
lba = 2095707
#12 0x0000555555836373 in ide_atapi_cmd (s=0x555556408f88)
at hw/ide/atapi.c:1152
buf = 0x7ffff44cc800 "("
#13 0x00005555558323e1 in ide_data_writew (opaque=0x555556408f08, addr=368,
val=0) at hw/ide/core.c:2020
bus = 0x555556408f08
s = 0x555556408f88
p = 0x7ffff44cc80c "IHDR"
#14 0x000055555564285f in portio_write (opaque=0x55555641d5d0, addr=0, data=0,
size=2) at /usr/src/qemu-2.2.0/ioport.c:204
mrpio = 0x55555641d5d0
mrp = 0x55555641d6f8
__PRETTY_FUNCTION__ = "portio_write"
#15 0x000055555564f07c in memory_region_write_accessor (mr=0x55555641d5d0,
addr=0, value=0x7ffff554fb28, size=2, shift=0, mask=65535)
at /usr/src/qemu-2.2.0/memory.c:443
tmp = 0
#16 0x000055555564f1c4 in access_with_adjusted_size (addr=0,
value=0x7ffff554fb28, size=2, access_size_min=1, access_size_max=4,
access=0x55555564efe0 <memory_region_write_accessor>, mr=0x55555641d5d0)
at /usr/src/qemu-2.2.0/memory.c:480
access_mask = 65535
access_size = 2
i = 0
#17 0x000055555565209f in memory_region_dispatch_write (mr=0x55555641d5d0,
addr=0, data=0, size=2) at /usr/src/qemu-2.2.0/memory.c:1117
No locals.
#18 0x00005555556559c7 in io_mem_write (mr=0x55555641d5d0, addr=0, val=0,
size=2) at /usr/src/qemu-2.2.0/memory.c:1973
No locals.
#19 0x00005555555fc4be in address_space_rw (as=0x555555e7a880, addr=368,
buf=0x7ffff7ee6000 "", len=2, is_write=true)
at /usr/src/qemu-2.2.0/exec.c:2141
l = 2
ptr = 0x55555567a7a6 "H\213E\370dH3\004%("
val = 0
addr1 = 0
mr = 0x55555641d5d0
error = false
#20 0x000055555564b454 in kvm_handle_io (port=368, data=0x7ffff7ee6000,
size=2) at /usr/src/qemu-2.2.0/ioport.c:204
mrpio = 0x55555641d5d0
mrp = 0x55555641d6f8
__PRETTY_FUNCTION__ = "portio_write"
#15 0x000055555564f07c in memory_region_write_accessor (mr=0x55555641d5d0,
addr=0, value=0x7ffff554fb28, size=2, shift=0, mask=65535)
at /usr/src/qemu-2.2.0/memory.c:443
tmp = 0
#16 0x000055555564f1c4 in access_with_adjusted_size (addr=0,
value=0x7ffff554fb28, size=2, access_size_min=1, access_size_max=4,
access=0x55555564efe0 <memory_region_write_accessor>, mr=0x55555641d5d0)
at /usr/src/qemu-2.2.0/memory.c:480
access_mask = 65535
access_size = 2
i = 0
#17 0x000055555565209f in memory_region_dispatch_write (mr=0x55555641d5d0,
addr=0, data=0, size=2) at /usr/src/qemu-2.2.0/memory.c:1117
No locals.
#18 0x00005555556559c7 in io_mem_write (mr=0x55555641d5d0, addr=0, val=0,
size=2) at /usr/src/qemu-2.2.0/memory.c:1973
No locals.
#19 0x00005555555fc4be in address_space_rw (as=0x555555e7a880, addr=368,
buf=0x7ffff7ee6000 "", len=2, is_write=true)
at /usr/src/qemu-2.2.0/exec.c:2141
l = 2
ptr = 0x55555567a7a6 "H\213E\370dH3\004%("
val = 0
addr1 = 0
mr = 0x55555641d5d0
error = false
#20 0x000055555564b454 in kvm_handle_io (port=368, data=0x7ffff7ee6000,
direction=1, size=2, count=1) at /usr/src/qemu-2.2.0/kvm-all.c:1632
i = 0
ptr = 0x7ffff7ee6000 ""
#21 0x000055555564baa4 in kvm_cpu_exec (cpu=0x55555638e7e0)
at /usr/src/qemu-2.2.0/kvm-all.c:1789
run = 0x7ffff7ee5000
ret = 0
run_ret = 0
#22 0x00005555556301dc in qemu_kvm_cpu_thread_fn (arg=0x55555638e7e0)
at /usr/src/qemu-2.2.0/cpus.c:953
cpu = 0x55555638e7e0
r = 0
#23 0x00007ffff6065e9a in start_thread ()
from /lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#24 0x00007ffff5d9338d in clone () from /lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#25 0x0000000000000000 in ?? ()
No symbol table info available.
Thank you,
Peter
next prev parent reply other threads:[~2015-06-18 7:04 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <55803637.3060607@kamp.de>
2015-06-16 15:34 ` [Qemu-devel] [Qemu-block] RFC cdrom in own thread? Stefan Hajnoczi
2015-06-17 8:35 ` Kevin Wolf
2015-06-18 6:03 ` Peter Lieven
2015-06-18 6:57 ` Markus Armbruster
2015-06-18 6:39 ` Peter Lieven
2015-06-18 6:59 ` Paolo Bonzini
2015-06-18 7:03 ` Peter Lieven [this message]
2015-06-18 7:12 ` Peter Lieven
2015-06-18 7:45 ` Kevin Wolf
2015-06-18 8:30 ` Peter Lieven
2015-06-18 8:42 ` Kevin Wolf
2015-06-18 9:29 ` Peter Lieven
2015-06-18 9:36 ` Stefan Hajnoczi
2015-06-18 9:53 ` Peter Lieven
2015-06-19 13:14 ` Peter Lieven
2015-06-22 9:25 ` Stefan Hajnoczi
2015-06-22 13:09 ` Peter Lieven
2015-06-22 21:54 ` John Snow
2015-06-23 6:36 ` Peter Lieven
2015-08-14 13:43 ` Peter Lieven
2015-08-14 14:08 ` Kevin Wolf
2015-08-14 14:21 ` Peter Lieven
2015-08-14 14:45 ` Peter Lieven
2015-08-15 19:02 ` Peter Lieven
2015-06-18 10:17 ` Peter Lieven
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