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| author | Paolo Bonzini <pbonzini@redhat.com> | 2016-10-27 12:48:55 +0200 |
|---|---|---|
| committer | Fam Zheng <famz@redhat.com> | 2016-10-28 21:50:18 +0800 |
| commit | 88b062c2036cfd05b5111147736a08ba05ea05a9 (patch) | |
| tree | b7018cd61ca309939b7197f7ad3ff729f9c0769d /block/block-backend.c | |
| parent | 6653a73d12fbac8c9b5c22bb21aef22759b28c1c (diff) | |
| download | qemu-88b062c2036cfd05b5111147736a08ba05ea05a9.tar.gz | |
block: introduce BDRV_POLL_WHILE
We want the BDS event loop to run exclusively in the iothread that
owns the BDS's AioContext. This macro will provide the synchronization
between the two event loops; for now it just wraps the common idiom
of a while loop around aio_poll.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Message-Id: <1477565348-5458-8-git-send-email-pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
Diffstat (limited to 'block/block-backend.c')
| -rw-r--r-- | block/block-backend.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/block/block-backend.c b/block/block-backend.c index bd6316c32a..27a7f6f523 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -878,7 +878,6 @@ static int blk_prw(BlockBackend *blk, int64_t offset, uint8_t *buf, int64_t bytes, CoroutineEntry co_entry, BdrvRequestFlags flags) { - AioContext *aio_context; QEMUIOVector qiov; struct iovec iov; Coroutine *co; @@ -900,11 +899,7 @@ static int blk_prw(BlockBackend *blk, int64_t offset, uint8_t *buf, co = qemu_coroutine_create(co_entry, &rwco); qemu_coroutine_enter(co); - - aio_context = blk_get_aio_context(blk); - while (rwco.ret == NOT_DONE) { - aio_poll(aio_context, true); - } + BDRV_POLL_WHILE(blk_bs(blk), rwco.ret == NOT_DONE); return rwco.ret; } |