Stefan Hajnoczi 2cdff7f620 linux-aio: avoid deadlock in nested aio_poll() calls ... If two Linux AIO request completions are fetched in the same io_getevents() call, QEMU will deadlock if request A's callback waits for request B to complete using an aio_poll() loop. This was reported to happen with the mirror blockjob. This patch moves completion processing into a BH and makes it resumable. Nested event loops can resume completion processing so that request B will complete and the deadlock will not occur. Cc: Kevin Wolf <kwolf@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Ming Lei <ming.lei@canonical.com> Cc: Marcin Gibuła <m.gibula@beyond.pl> Reported-by: Marcin Gibuła <m.gibula@beyond.pl> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Tested-by: Marcin Gibuła <m.gibula@beyond.pl>		2014-08-29 15:59:17 +01:00
..
archipelago.c	block: Use g_new() & friends where that makes obvious sense	2014-08-20 11:51:28 +02:00
backup.c	block/backup: Fix hang for unaligned image size	2014-07-09 15:50:11 +02:00
blkdebug.c	blkdebug: Delete BH in bdrv_aio_cancel	2014-08-22 11:07:00 +02:00
blkverify.c	blkverify: Implement bdrv_refresh_filename()	2014-08-20 14:31:56 +02:00
bochs.c	block: Use g_new() & friends to avoid multiplying sizes	2014-08-20 11:51:28 +02:00
cloop.c	cloop: Handle failure for potentially large allocations	2014-08-15 15:07:15 +02:00
commit.c	block: extend block-commit to accept a string for the backing file	2014-07-01 10:47:01 +02:00
cow.c	block/cow: Avoid use of uninitialized cow_bs in error path	2014-07-01 10:15:34 +02:00
curl.c	block.curl: adding 'timeout' option	2014-08-29 10:46:57 +01:00
dmg.c	dmg: Handle failure for potentially large allocations	2014-08-15 15:07:15 +02:00
gluster.c	block: Use g_new() & friends where that makes obvious sense	2014-08-20 11:51:28 +02:00
iscsi.c	block/iscsi: fix memory corruption on iscsi resize	2014-08-22 10:55:22 +02:00
linux-aio.c	linux-aio: avoid deadlock in nested aio_poll() calls	2014-08-29 15:59:17 +01:00
Makefile.objs	aio-win32: add support for sockets	2014-08-29 10:46:58 +01:00
mirror.c	mirror: fix uninitialized variable delay_ns warnings	2014-08-28 13:42:25 +01:00
nbd-client.c	nbd: implement .bdrv_detach/attach_aio_context()	2014-06-04 09:56:11 +02:00
nbd-client.h	nbd: implement .bdrv_detach/attach_aio_context()	2014-06-04 09:56:11 +02:00
nbd.c	nbd: Implement bdrv_refresh_filename()	2014-08-20 14:31:56 +02:00
nfs.c	block: Use g_new() & friends where that makes obvious sense	2014-08-20 11:51:28 +02:00
parallels.c	block: Use g_new() & friends to avoid multiplying sizes	2014-08-20 11:51:28 +02:00
qapi.c	qemu-img info: show nocow info	2014-08-15 15:07:14 +02:00
qcow2-cache.c	qcow2: Use g_try_new0() for cache array	2014-08-20 11:51:28 +02:00
qcow2-cluster.c	block: Use g_new() & friends where that makes obvious sense	2014-08-20 11:51:28 +02:00
qcow2-refcount.c	block: Use g_new() & friends where that makes obvious sense	2014-08-20 11:51:28 +02:00
qcow2-snapshot.c	block: Use g_new() & friends where that makes obvious sense	2014-08-20 11:51:28 +02:00
qcow2.c	qcow2: Add runtime options for cache sizes	2014-08-20 11:51:28 +02:00
qcow2.h	qcow2: Add runtime options for cache sizes	2014-08-20 11:51:28 +02:00
qcow.c	block: Use g_new() & friends where that makes obvious sense	2014-08-20 11:51:28 +02:00
qed-check.c	block: Use g_new() & friends to avoid multiplying sizes	2014-08-20 11:51:28 +02:00
qed-cluster.c	Use glib memory allocation and free functions	2011-08-20 23:01:08 -05:00
qed-gencb.c	Use glib memory allocation and free functions	2011-08-20 23:01:08 -05:00
qed-l2-cache.c	qed: do not evict in-use L2 table cache entries	2012-03-12 15:14:06 +01:00
qed-table.c	qed: use BlockDriverState's AioContext	2014-06-04 09:56:11 +02:00
qed.c	qed: Handle failure for potentially large allocations	2014-08-15 15:07:15 +02:00
qed.h	qed: Make qiov match request size until backing file EOF	2014-07-14 12:03:20 +02:00
quorum.c	block/quorum: add simple read pattern support	2014-08-29 10:46:58 +01:00
raw_bsd.c	block: Add Error argument to bdrv_refresh_limits()	2014-07-18 13:18:43 +01:00
raw-aio.h	linux-aio: implement io plug, unplug and flush io queue	2014-07-07 11:05:17 +02:00
raw-posix.c	raw-posix: fix O_DIRECT short reads	2014-08-22 11:00:56 +02:00
raw-win32.c	cleanup QEMUOptionParameter	2014-06-16 17:23:21 +08:00
rbd.c	block: Use g_new() & friends to avoid multiplying sizes	2014-08-20 11:51:28 +02:00
sheepdog.c	sheepdog: fix a core dump while do auto-reconnecting	2014-08-29 10:46:58 +01:00
snapshot.c	Use error_is_set() only when necessary	2014-02-17 11:57:23 -05:00
ssh.c	cleanup QEMUOptionParameter	2014-06-16 17:23:21 +08:00
stream.c	block: Add Error argument to bdrv_refresh_limits()	2014-07-18 13:18:43 +01:00
vdi.c	block: Use g_new() & friends where that makes obvious sense	2014-08-20 11:51:28 +02:00
vhdx-endian.c	block: VHDX endian fixes	2014-08-15 15:07:14 +02:00
vhdx-log.c	block: Drop some superfluous casts from void *	2014-08-20 11:51:28 +02:00
vhdx.c	block: Use g_new() & friends where that makes obvious sense	2014-08-20 11:51:28 +02:00
vhdx.h	block: VHDX endian fixes	2014-08-15 15:07:14 +02:00
vmdk.c	vmdk: Use bdrv_nb_sectors() where sectors, not bytes are wanted	2014-08-22 11:10:12 +02:00
vpc.c	vpc: Handle failure for potentially large allocations	2014-08-15 15:07:16 +02:00
vvfat.c	block/vvfat.c: remove debugging code to reinit stderr if NULL	2014-08-21 10:36:29 +02:00
win32-aio.c	raw-win32: Handle failure for potentially large allocations	2014-08-15 15:07:16 +02:00