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qemu-e2k/block
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Josh Durgin dc7588c1eb rbd: add an asynchronous flush 
The existing bdrv_co_flush_to_disk implementation uses rbd_flush(),
which is sychronous and causes the main qemu thread to block until it
is complete. This results in unresponsiveness and extra latency for
the guest.

Fix this by using an asynchronous version of flush.  This was added to
librbd with a special #define to indicate its presence, since it will
be backported to stable versions. Thus, there is no need to check the
version of librbd.

Implement this as bdrv_aio_flush, since it matches other aio functions
in the rbd block driver, and leave out bdrv_co_flush_to_disk when the
asynchronous version is available.

Reported-by: Oliver Francke <oliver@filoo.de>
Signed-off-by: Josh Durgin <josh.durgin@inktank.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
 		2013-04-15 10:18:05 +02:00
..
Makefile.objs block: Add support for Secure Shell (ssh) block device. 2013-04-15 10:18:05 +02:00
blkdebug.c block: Add options QDict to bdrv_file_open() prototypes 2013-03-22 17:51:31 +01:00
blkverify.c block: Add options QDict to bdrv_file_open() prototypes 2013-03-22 17:51:31 +01:00
bochs.c block: Add options QDict to .bdrv_open() 2013-03-15 16:07:49 +01:00
cloop.c block: Add options QDict to .bdrv_open() 2013-03-15 16:07:49 +01:00
commit.c block: fix null-pointer bug on error case in block commit 2013-01-17 10:51:11 +01:00
cow.c block: Add options QDict to bdrv_file_open() prototypes 2013-03-22 17:51:31 +01:00
curl.c block: Add options QDict to bdrv_file_open() prototypes 2013-03-22 17:51:31 +01:00
dmg.c block: Make find_image_format safe with NULL filename 2013-03-22 17:51:32 +01:00
gluster.c block: Add options QDict to bdrv_file_open() prototypes 2013-03-22 17:51:31 +01:00
iscsi.c hw: move headers to include/ 2013-04-08 18:13:10 +02:00
linux-aio.c misc: move include files to include/qemu/ 2012-12-19 08:32:39 +01:00
mirror.c mirror: do nothing on zero-sized disk 2013-01-25 18:18:35 +01:00
nbd.c oslib-posix: rename socket_set_nonblock() to qemu_set_nonblock() 2013-04-02 11:47:37 -04:00
parallels.c block: Add options QDict to .bdrv_open() 2013-03-15 16:07:49 +01:00
qcow.c aes: move aes.h from include/block to include/qemu 2013-04-13 13:51:57 +02:00
qcow2-cache.c block: move include files to include/block/ 2012-12-19 08:31:31 +01:00
qcow2-cluster.c qcow2: Gather clusters in a looping loop 2013-03-28 11:52:44 +01:00
qcow2-refcount.c qcow2: Fix L1 write error handling in qcow2_update_snapshot_refcount 2013-04-05 18:58:05 +02:00
qcow2-snapshot.c qcow2: flush in qcow2_update_snapshot_refcount() 2013-03-15 16:07:50 +01:00
qcow2.c block: Introduce bdrv_pwritev() for qcow2_save_vmstate 2013-04-15 08:26:18 +02:00
qcow2.h aes: move aes.h from include/block to include/qemu 2013-04-13 13:51:57 +02:00
qed-check.c qed: mark image clean after repair succeeds 2012-08-10 10:25:12 +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 misc: move include files to include/qemu/ 2012-12-19 08:32:39 +01:00
qed.c block: Add options QDict to bdrv_file_open() prototypes 2013-03-22 17:51:31 +01:00
qed.h block: move include files to include/block/ 2012-12-19 08:31:31 +01:00
raw-aio.h block: make discard asynchronous 2013-01-15 10:03:47 +01:00
raw-posix.c block: Add options QDict to bdrv_file_open() prototypes 2013-03-22 17:51:31 +01:00
raw-win32.c block: Add options QDict to bdrv_file_open() prototypes (fix MinGW build) 2013-03-25 09:53:04 +01:00
raw.c block: Add options QDict to .bdrv_open() 2013-03-15 16:07:49 +01:00
rbd.c rbd: add an asynchronous flush 2013-04-15 10:18:05 +02:00
sheepdog.c block: Introduce bdrv_writev_vmstate 2013-04-15 08:26:18 +02:00
ssh.c block: ssh: Use libssh2_sftp_fsync (if supported by libssh2) to flush to disk. 2013-04-15 10:18:05 +02:00
stream.c block: move include files to include/block/ 2012-12-19 08:31:31 +01:00
vdi.c block: Add options QDict to .bdrv_open() 2013-03-15 16:07:49 +01:00
vmdk.c block: Add options QDict to bdrv_file_open() prototypes 2013-03-22 17:51:31 +01:00
vpc.c block: Add options QDict to .bdrv_open() 2013-03-15 16:07:49 +01:00
vvfat.c block: Add options QDict to bdrv_file_open() prototypes 2013-03-22 17:51:31 +01:00
win32-aio.c win32-aio: use iov utility functions instead of open-coding them 2013-01-18 09:57:51 +01:00