* [Qemu-devel] [PATCH] aio-posix: honor is_external in AioContext polling
@ 2017-01-24 9:53 Stefan Hajnoczi
2017-01-24 12:04 ` Fam Zheng
` (3 more replies)
0 siblings, 4 replies; 8+ messages in thread
From: Stefan Hajnoczi @ 2017-01-24 9:53 UTC (permalink / raw)
To: qemu-devel
Cc: Alberto Garcia, Paolo Bonzini, qemu-block, Fam Zheng, Stefan Hajnoczi
AioHandlers marked ->is_external must be skipped when aio_node_check()
fails. bdrv_drained_begin() needs this to prevent dataplane from
submitting new I/O requests while another thread accesses the device and
relies on it being quiesced.
This patch fixes the following segfault:
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x00005577f6127dad in bdrv_io_plug (bs=0x5577f7ae52f0) at qemu/block/io.c:2650
2650 bdrv_io_plug(child->bs);
[Current thread is 1 (Thread 0x7ff5c4bd1c80 (LWP 10917))]
(gdb) bt
#0 0x00005577f6127dad in bdrv_io_plug (bs=0x5577f7ae52f0) at qemu/block/io.c:2650
#1 0x00005577f6114363 in blk_io_plug (blk=0x5577f7b8ba20) at qemu/block/block-backend.c:1561
#2 0x00005577f5d4091d in virtio_blk_handle_vq (s=0x5577f9ada030, vq=0x5577f9b3d2a0) at qemu/hw/block/virtio-blk.c:589
#3 0x00005577f5d4240d in virtio_blk_data_plane_handle_output (vdev=0x5577f9ada030, vq=0x5577f9b3d2a0) at qemu/hw/block/dataplane/virtio-blk.c:158
#4 0x00005577f5d88acd in virtio_queue_notify_aio_vq (vq=0x5577f9b3d2a0) at qemu/hw/virtio/virtio.c:1304
#5 0x00005577f5d8aaaf in virtio_queue_host_notifier_aio_poll (opaque=0x5577f9b3d308) at qemu/hw/virtio/virtio.c:2134
#6 0x00005577f60ca077 in run_poll_handlers_once (ctx=0x5577f79ddbb0) at qemu/aio-posix.c:493
#7 0x00005577f60ca268 in try_poll_mode (ctx=0x5577f79ddbb0, blocking=true) at qemu/aio-posix.c:569
#8 0x00005577f60ca331 in aio_poll (ctx=0x5577f79ddbb0, blocking=true) at qemu/aio-posix.c:601
#9 0x00005577f612722a in bdrv_flush (bs=0x5577f7c20970) at qemu/block/io.c:2403
#10 0x00005577f60c1b2d in bdrv_close (bs=0x5577f7c20970) at qemu/block.c:2322
#11 0x00005577f60c20e7 in bdrv_delete (bs=0x5577f7c20970) at qemu/block.c:2465
#12 0x00005577f60c3ecf in bdrv_unref (bs=0x5577f7c20970) at qemu/block.c:3425
#13 0x00005577f60bf951 in bdrv_root_unref_child (child=0x5577f7a2de70) at qemu/block.c:1361
#14 0x00005577f6112162 in blk_remove_bs (blk=0x5577f7b8ba20) at qemu/block/block-backend.c:491
#15 0x00005577f6111b1b in blk_remove_all_bs () at qemu/block/block-backend.c:245
#16 0x00005577f60c1db6 in bdrv_close_all () at qemu/block.c:2382
#17 0x00005577f5e60cca in main (argc=20, argv=0x7ffea6eb8398, envp=0x7ffea6eb8440) at qemu/vl.c:4684
The key thing is that bdrv_close() uses bdrv_drained_begin() and
virtio_queue_host_notifier_aio_poll() must not be called.
Thanks to Fam Zheng <famz@redhat.com> for identifying the root cause of
this crash.
Reported-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
aio-posix.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/aio-posix.c b/aio-posix.c
index 9453d83..a8d7090 100644
--- a/aio-posix.c
+++ b/aio-posix.c
@@ -508,7 +508,8 @@ static bool run_poll_handlers_once(AioContext *ctx)
QLIST_FOREACH_RCU(node, &ctx->aio_handlers, node) {
if (!node->deleted && node->io_poll &&
- node->io_poll(node->opaque)) {
+ aio_node_check(ctx, node->is_external) &&
+ node->io_poll(node->opaque)) {
progress = true;
}
--
2.9.3
^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [Qemu-devel] [PATCH] aio-posix: honor is_external in AioContext polling
2017-01-24 9:53 [Qemu-devel] [PATCH] aio-posix: honor is_external in AioContext polling Stefan Hajnoczi
@ 2017-01-24 12:04 ` Fam Zheng
2017-01-24 12:15 ` Paolo Bonzini
2017-01-24 13:40 ` Fam Zheng
` (2 subsequent siblings)
3 siblings, 1 reply; 8+ messages in thread
From: Fam Zheng @ 2017-01-24 12:04 UTC (permalink / raw)
To: Stefan Hajnoczi; +Cc: qemu-devel, Paolo Bonzini, Alberto Garcia, qemu-block
On Tue, 01/24 09:53, Stefan Hajnoczi wrote:
> AioHandlers marked ->is_external must be skipped when aio_node_check()
> fails. bdrv_drained_begin() needs this to prevent dataplane from
> submitting new I/O requests while another thread accesses the device and
> relies on it being quiesced.
>
> This patch fixes the following segfault:
>
> Program terminated with signal SIGSEGV, Segmentation fault.
> #0 0x00005577f6127dad in bdrv_io_plug (bs=0x5577f7ae52f0) at qemu/block/io.c:2650
> 2650 bdrv_io_plug(child->bs);
> [Current thread is 1 (Thread 0x7ff5c4bd1c80 (LWP 10917))]
> (gdb) bt
> #0 0x00005577f6127dad in bdrv_io_plug (bs=0x5577f7ae52f0) at qemu/block/io.c:2650
> #1 0x00005577f6114363 in blk_io_plug (blk=0x5577f7b8ba20) at qemu/block/block-backend.c:1561
> #2 0x00005577f5d4091d in virtio_blk_handle_vq (s=0x5577f9ada030, vq=0x5577f9b3d2a0) at qemu/hw/block/virtio-blk.c:589
> #3 0x00005577f5d4240d in virtio_blk_data_plane_handle_output (vdev=0x5577f9ada030, vq=0x5577f9b3d2a0) at qemu/hw/block/dataplane/virtio-blk.c:158
> #4 0x00005577f5d88acd in virtio_queue_notify_aio_vq (vq=0x5577f9b3d2a0) at qemu/hw/virtio/virtio.c:1304
> #5 0x00005577f5d8aaaf in virtio_queue_host_notifier_aio_poll (opaque=0x5577f9b3d308) at qemu/hw/virtio/virtio.c:2134
> #6 0x00005577f60ca077 in run_poll_handlers_once (ctx=0x5577f79ddbb0) at qemu/aio-posix.c:493
> #7 0x00005577f60ca268 in try_poll_mode (ctx=0x5577f79ddbb0, blocking=true) at qemu/aio-posix.c:569
> #8 0x00005577f60ca331 in aio_poll (ctx=0x5577f79ddbb0, blocking=true) at qemu/aio-posix.c:601
> #9 0x00005577f612722a in bdrv_flush (bs=0x5577f7c20970) at qemu/block/io.c:2403
> #10 0x00005577f60c1b2d in bdrv_close (bs=0x5577f7c20970) at qemu/block.c:2322
> #11 0x00005577f60c20e7 in bdrv_delete (bs=0x5577f7c20970) at qemu/block.c:2465
> #12 0x00005577f60c3ecf in bdrv_unref (bs=0x5577f7c20970) at qemu/block.c:3425
> #13 0x00005577f60bf951 in bdrv_root_unref_child (child=0x5577f7a2de70) at qemu/block.c:1361
> #14 0x00005577f6112162 in blk_remove_bs (blk=0x5577f7b8ba20) at qemu/block/block-backend.c:491
> #15 0x00005577f6111b1b in blk_remove_all_bs () at qemu/block/block-backend.c:245
> #16 0x00005577f60c1db6 in bdrv_close_all () at qemu/block.c:2382
> #17 0x00005577f5e60cca in main (argc=20, argv=0x7ffea6eb8398, envp=0x7ffea6eb8440) at qemu/vl.c:4684
>
> The key thing is that bdrv_close() uses bdrv_drained_begin() and
> virtio_queue_host_notifier_aio_poll() must not be called.
>
> Thanks to Fam Zheng <famz@redhat.com> for identifying the root cause of
> this crash.
>
> Reported-by: Alberto Garcia <berto@igalia.com>
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> ---
> aio-posix.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/aio-posix.c b/aio-posix.c
> index 9453d83..a8d7090 100644
> --- a/aio-posix.c
> +++ b/aio-posix.c
> @@ -508,7 +508,8 @@ static bool run_poll_handlers_once(AioContext *ctx)
>
> QLIST_FOREACH_RCU(node, &ctx->aio_handlers, node) {
> if (!node->deleted && node->io_poll &&
> - node->io_poll(node->opaque)) {
> + aio_node_check(ctx, node->is_external) &&
> + node->io_poll(node->opaque)) {
> progress = true;
> }
>
> --
> 2.9.3
>
>
The patch is not wrong and I believe it is enough to fix the crash, however it's
not enough...
All in all I think we should skip external handlers regardless of
aio_disable_external(), or even skip try_poll_mode, in nested aio_poll()'s. The
reasons are 1) many nested aio_poll()'s don't have bdrv_drained_begin, so this
check is not sufficient; 2) aio_poll() on qemu_aio_context doesn't look at
ioeventfd before, but this was changed by adding try_poll_mode(), which is not
very correct.
These two factors combined together make it possible for bdrv_flush() etc to
spin longer than necessary, if not forever, when the guest keeps submitting more
requests with ioeventfd.
Fam
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Qemu-devel] [PATCH] aio-posix: honor is_external in AioContext polling
2017-01-24 12:04 ` Fam Zheng
@ 2017-01-24 12:15 ` Paolo Bonzini
2017-01-24 12:47 ` Fam Zheng
0 siblings, 1 reply; 8+ messages in thread
From: Paolo Bonzini @ 2017-01-24 12:15 UTC (permalink / raw)
To: Fam Zheng, Stefan Hajnoczi; +Cc: qemu-devel, Alberto Garcia, qemu-block
On 24/01/2017 13:04, Fam Zheng wrote:
>
> All in all I think we should skip external handlers regardless of
> aio_disable_external(), or even skip try_poll_mode, in nested aio_poll()'s. The
> reasons are 1) many nested aio_poll()'s don't have bdrv_drained_begin, so this
> check is not sufficient [...] bdrv_flush()
> spin longer than necessary, if not forever, when the guest keeps submitting more
> requests with ioeventfd.
I'm not sure I understand why this is related. aio_poll() only tries
poll mode once, so bdrv_flush would only spin until the fsync is complete.
Nested aio_polls don't have bdrv_drained_begin because draining matters
over the whole section where you need atomicity (e.g. taking a live
snapshot). It doesn't matter for single I/O operation.
Paolo
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Qemu-devel] [PATCH] aio-posix: honor is_external in AioContext polling
2017-01-24 12:15 ` Paolo Bonzini
@ 2017-01-24 12:47 ` Fam Zheng
2017-01-24 12:51 ` Paolo Bonzini
0 siblings, 1 reply; 8+ messages in thread
From: Fam Zheng @ 2017-01-24 12:47 UTC (permalink / raw)
To: Paolo Bonzini; +Cc: Stefan Hajnoczi, qemu-devel, Alberto Garcia, qemu-block
On Tue, 01/24 13:15, Paolo Bonzini wrote:
>
>
> On 24/01/2017 13:04, Fam Zheng wrote:
> >
> > All in all I think we should skip external handlers regardless of
> > aio_disable_external(), or even skip try_poll_mode, in nested aio_poll()'s. The
> > reasons are 1) many nested aio_poll()'s don't have bdrv_drained_begin, so this
> > check is not sufficient [...] bdrv_flush()
> > spin longer than necessary, if not forever, when the guest keeps submitting more
> > requests with ioeventfd.
>
>
> I'm not sure I understand why this is related. aio_poll() only tries
> poll mode once, so bdrv_flush would only spin until the fsync is complete.
Right, I was confused. The problematic ones are "drain" style ones that tracks
a inflight counter. The only suspecious one is in v9fs_reset(), otherwise we are
safe!
Fam
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Qemu-devel] [PATCH] aio-posix: honor is_external in AioContext polling
2017-01-24 12:47 ` Fam Zheng
@ 2017-01-24 12:51 ` Paolo Bonzini
0 siblings, 0 replies; 8+ messages in thread
From: Paolo Bonzini @ 2017-01-24 12:51 UTC (permalink / raw)
To: Fam Zheng; +Cc: Stefan Hajnoczi, qemu-devel, Alberto Garcia, qemu-block
On 24/01/2017 13:47, Fam Zheng wrote:
>> I'm not sure I understand why this is related. aio_poll() only tries
>> poll mode once, so bdrv_flush would only spin until the fsync is complete.
>
> Right, I was confused. The problematic ones are "drain" style ones that tracks
> a inflight counter. The only suspecious one is in v9fs_reset(), otherwise we are
> safe!
And v9fs_reset in turn is fine because it doesn't use
virtio_queue_aio_set_host_notifier_handler (so it goes to
event_notifier_set_handler and then iohandler_ctx, not
qemu_get_aio_context()).
Paolo
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Qemu-devel] [PATCH] aio-posix: honor is_external in AioContext polling
2017-01-24 9:53 [Qemu-devel] [PATCH] aio-posix: honor is_external in AioContext polling Stefan Hajnoczi
2017-01-24 12:04 ` Fam Zheng
@ 2017-01-24 13:40 ` Fam Zheng
2017-01-24 14:31 ` Alberto Garcia
2017-01-25 13:16 ` Stefan Hajnoczi
3 siblings, 0 replies; 8+ messages in thread
From: Fam Zheng @ 2017-01-24 13:40 UTC (permalink / raw)
To: Stefan Hajnoczi; +Cc: qemu-devel, Paolo Bonzini, Alberto Garcia, qemu-block
On Tue, 01/24 09:53, Stefan Hajnoczi wrote:
> AioHandlers marked ->is_external must be skipped when aio_node_check()
> fails. bdrv_drained_begin() needs this to prevent dataplane from
> submitting new I/O requests while another thread accesses the device and
> relies on it being quiesced.
>
> This patch fixes the following segfault:
>
> Program terminated with signal SIGSEGV, Segmentation fault.
> #0 0x00005577f6127dad in bdrv_io_plug (bs=0x5577f7ae52f0) at qemu/block/io.c:2650
> 2650 bdrv_io_plug(child->bs);
> [Current thread is 1 (Thread 0x7ff5c4bd1c80 (LWP 10917))]
> (gdb) bt
> #0 0x00005577f6127dad in bdrv_io_plug (bs=0x5577f7ae52f0) at qemu/block/io.c:2650
> #1 0x00005577f6114363 in blk_io_plug (blk=0x5577f7b8ba20) at qemu/block/block-backend.c:1561
> #2 0x00005577f5d4091d in virtio_blk_handle_vq (s=0x5577f9ada030, vq=0x5577f9b3d2a0) at qemu/hw/block/virtio-blk.c:589
> #3 0x00005577f5d4240d in virtio_blk_data_plane_handle_output (vdev=0x5577f9ada030, vq=0x5577f9b3d2a0) at qemu/hw/block/dataplane/virtio-blk.c:158
> #4 0x00005577f5d88acd in virtio_queue_notify_aio_vq (vq=0x5577f9b3d2a0) at qemu/hw/virtio/virtio.c:1304
> #5 0x00005577f5d8aaaf in virtio_queue_host_notifier_aio_poll (opaque=0x5577f9b3d308) at qemu/hw/virtio/virtio.c:2134
> #6 0x00005577f60ca077 in run_poll_handlers_once (ctx=0x5577f79ddbb0) at qemu/aio-posix.c:493
> #7 0x00005577f60ca268 in try_poll_mode (ctx=0x5577f79ddbb0, blocking=true) at qemu/aio-posix.c:569
> #8 0x00005577f60ca331 in aio_poll (ctx=0x5577f79ddbb0, blocking=true) at qemu/aio-posix.c:601
> #9 0x00005577f612722a in bdrv_flush (bs=0x5577f7c20970) at qemu/block/io.c:2403
> #10 0x00005577f60c1b2d in bdrv_close (bs=0x5577f7c20970) at qemu/block.c:2322
> #11 0x00005577f60c20e7 in bdrv_delete (bs=0x5577f7c20970) at qemu/block.c:2465
> #12 0x00005577f60c3ecf in bdrv_unref (bs=0x5577f7c20970) at qemu/block.c:3425
> #13 0x00005577f60bf951 in bdrv_root_unref_child (child=0x5577f7a2de70) at qemu/block.c:1361
> #14 0x00005577f6112162 in blk_remove_bs (blk=0x5577f7b8ba20) at qemu/block/block-backend.c:491
> #15 0x00005577f6111b1b in blk_remove_all_bs () at qemu/block/block-backend.c:245
> #16 0x00005577f60c1db6 in bdrv_close_all () at qemu/block.c:2382
> #17 0x00005577f5e60cca in main (argc=20, argv=0x7ffea6eb8398, envp=0x7ffea6eb8440) at qemu/vl.c:4684
>
> The key thing is that bdrv_close() uses bdrv_drained_begin() and
> virtio_queue_host_notifier_aio_poll() must not be called.
>
> Thanks to Fam Zheng <famz@redhat.com> for identifying the root cause of
> this crash.
>
> Reported-by: Alberto Garcia <berto@igalia.com>
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Paolo eliminated my concern, so this looks good to me now!
Reviewed-by: Fam Zheng <famz@redhat.com>
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Qemu-devel] [PATCH] aio-posix: honor is_external in AioContext polling
2017-01-24 9:53 [Qemu-devel] [PATCH] aio-posix: honor is_external in AioContext polling Stefan Hajnoczi
2017-01-24 12:04 ` Fam Zheng
2017-01-24 13:40 ` Fam Zheng
@ 2017-01-24 14:31 ` Alberto Garcia
2017-01-25 13:16 ` Stefan Hajnoczi
3 siblings, 0 replies; 8+ messages in thread
From: Alberto Garcia @ 2017-01-24 14:31 UTC (permalink / raw)
To: Stefan Hajnoczi, qemu-devel; +Cc: Paolo Bonzini, qemu-block, Fam Zheng
On Tue 24 Jan 2017 10:53:50 AM CET, Stefan Hajnoczi wrote:
> AioHandlers marked ->is_external must be skipped when aio_node_check()
> fails. bdrv_drained_begin() needs this to prevent dataplane from
> submitting new I/O requests while another thread accesses the device and
> relies on it being quiesced.
>
> Thanks to Fam Zheng <famz@redhat.com> for identifying the root cause of
> this crash.
>
> Reported-by: Alberto Garcia <berto@igalia.com>
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Tested-by: Alberto Garcia <berto@igalia.com>
Berto
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [Qemu-devel] [PATCH] aio-posix: honor is_external in AioContext polling
2017-01-24 9:53 [Qemu-devel] [PATCH] aio-posix: honor is_external in AioContext polling Stefan Hajnoczi
` (2 preceding siblings ...)
2017-01-24 14:31 ` Alberto Garcia
@ 2017-01-25 13:16 ` Stefan Hajnoczi
3 siblings, 0 replies; 8+ messages in thread
From: Stefan Hajnoczi @ 2017-01-25 13:16 UTC (permalink / raw)
To: qemu-devel; +Cc: Alberto Garcia, Paolo Bonzini, qemu-block, Fam Zheng
[-- Attachment #1: Type: text/plain, Size: 2954 bytes --]
On Tue, Jan 24, 2017 at 09:53:50AM +0000, Stefan Hajnoczi wrote:
> AioHandlers marked ->is_external must be skipped when aio_node_check()
> fails. bdrv_drained_begin() needs this to prevent dataplane from
> submitting new I/O requests while another thread accesses the device and
> relies on it being quiesced.
>
> This patch fixes the following segfault:
>
> Program terminated with signal SIGSEGV, Segmentation fault.
> #0 0x00005577f6127dad in bdrv_io_plug (bs=0x5577f7ae52f0) at qemu/block/io.c:2650
> 2650 bdrv_io_plug(child->bs);
> [Current thread is 1 (Thread 0x7ff5c4bd1c80 (LWP 10917))]
> (gdb) bt
> #0 0x00005577f6127dad in bdrv_io_plug (bs=0x5577f7ae52f0) at qemu/block/io.c:2650
> #1 0x00005577f6114363 in blk_io_plug (blk=0x5577f7b8ba20) at qemu/block/block-backend.c:1561
> #2 0x00005577f5d4091d in virtio_blk_handle_vq (s=0x5577f9ada030, vq=0x5577f9b3d2a0) at qemu/hw/block/virtio-blk.c:589
> #3 0x00005577f5d4240d in virtio_blk_data_plane_handle_output (vdev=0x5577f9ada030, vq=0x5577f9b3d2a0) at qemu/hw/block/dataplane/virtio-blk.c:158
> #4 0x00005577f5d88acd in virtio_queue_notify_aio_vq (vq=0x5577f9b3d2a0) at qemu/hw/virtio/virtio.c:1304
> #5 0x00005577f5d8aaaf in virtio_queue_host_notifier_aio_poll (opaque=0x5577f9b3d308) at qemu/hw/virtio/virtio.c:2134
> #6 0x00005577f60ca077 in run_poll_handlers_once (ctx=0x5577f79ddbb0) at qemu/aio-posix.c:493
> #7 0x00005577f60ca268 in try_poll_mode (ctx=0x5577f79ddbb0, blocking=true) at qemu/aio-posix.c:569
> #8 0x00005577f60ca331 in aio_poll (ctx=0x5577f79ddbb0, blocking=true) at qemu/aio-posix.c:601
> #9 0x00005577f612722a in bdrv_flush (bs=0x5577f7c20970) at qemu/block/io.c:2403
> #10 0x00005577f60c1b2d in bdrv_close (bs=0x5577f7c20970) at qemu/block.c:2322
> #11 0x00005577f60c20e7 in bdrv_delete (bs=0x5577f7c20970) at qemu/block.c:2465
> #12 0x00005577f60c3ecf in bdrv_unref (bs=0x5577f7c20970) at qemu/block.c:3425
> #13 0x00005577f60bf951 in bdrv_root_unref_child (child=0x5577f7a2de70) at qemu/block.c:1361
> #14 0x00005577f6112162 in blk_remove_bs (blk=0x5577f7b8ba20) at qemu/block/block-backend.c:491
> #15 0x00005577f6111b1b in blk_remove_all_bs () at qemu/block/block-backend.c:245
> #16 0x00005577f60c1db6 in bdrv_close_all () at qemu/block.c:2382
> #17 0x00005577f5e60cca in main (argc=20, argv=0x7ffea6eb8398, envp=0x7ffea6eb8440) at qemu/vl.c:4684
>
> The key thing is that bdrv_close() uses bdrv_drained_begin() and
> virtio_queue_host_notifier_aio_poll() must not be called.
>
> Thanks to Fam Zheng <famz@redhat.com> for identifying the root cause of
> this crash.
>
> Reported-by: Alberto Garcia <berto@igalia.com>
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> ---
> aio-posix.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
Thanks, applied to my block tree:
https://github.com/stefanha/qemu/commits/block
Stefan
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^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2017-01-25 13:16 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2017-01-24 9:53 [Qemu-devel] [PATCH] aio-posix: honor is_external in AioContext polling Stefan Hajnoczi
2017-01-24 12:04 ` Fam Zheng
2017-01-24 12:15 ` Paolo Bonzini
2017-01-24 12:47 ` Fam Zheng
2017-01-24 12:51 ` Paolo Bonzini
2017-01-24 13:40 ` Fam Zheng
2017-01-24 14:31 ` Alberto Garcia
2017-01-25 13:16 ` Stefan Hajnoczi
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