Alexander Yarygin f406c03c09 block: Let bdrv_drain_all() to call aio_poll() for each AioContext ... After the commit 9b536adc ("block: acquire AioContext in bdrv_drain_all()") the aio_poll() function got called for every BlockDriverState, in assumption that every device may have its own AioContext. If we have thousands of disks attached, there are a lot of BlockDriverStates but only a few AioContexts, leading to tons of unnecessary aio_poll() calls. This patch changes the bdrv_drain_all() function allowing it find shared AioContexts and to call aio_poll() only for unique ones. Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Cc: Kevin Wolf <kwolf@redhat.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Alexander Yarygin <yarygin@linux.vnet.ibm.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Tested-by: Christian Borntraeger <borntraeger@de.ibm.com> Message-id: 1433936297-7098-4-git-send-email-yarygin@linux.vnet.ibm.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>		2015-06-23 15:06:16 +01:00
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accounting.c
archipelago.c
backup.c
blkdebug.c
blkverify.c
block-backend.c
bochs.c
cloop.c
commit.c
curl.c
dmg.c
gluster.c
io.c	block: Let bdrv_drain_all() to call aio_poll() for each AioContext	2015-06-23 15:06:16 +01:00
iscsi.c
linux-aio.c
Makefile.objs
mirror.c
nbd-client.c
nbd-client.h
nbd.c
nfs.c
null.c
parallels.c
qapi.c
qcow2-cache.c
qcow2-cluster.c
qcow2-refcount.c
qcow2-snapshot.c
qcow2.c
qcow2.h
qcow.c
qed-check.c
qed-cluster.c
qed-gencb.c
qed-l2-cache.c
qed-table.c
qed.c
qed.h
quorum.c
raw_bsd.c
raw-aio.h
raw-posix.c
raw-win32.c
rbd.c
sheepdog.c
snapshot.c
ssh.c
stream.c
throttle-groups.c
vdi.c
vhdx-endian.c
vhdx-log.c
vhdx.c
vhdx.h
vmdk.c
vpc.c
vvfat.c
win32-aio.c
write-threshold.c