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block: Pause block jobs in bdrv_drain_all
This is necessary to suppress more IO requests from being generated from block job coroutines. Signed-off-by: Fam Zheng <famz@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Message-id: 1428069921-2957-3-git-send-email-famz@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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parent
751ebd76e6
commit
69da3b0b47
20
block.c
20
block.c
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@ -2040,6 +2040,16 @@ void bdrv_drain_all(void)
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bool busy = true;
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BlockDriverState *bs;
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QTAILQ_FOREACH(bs, &bdrv_states, device_list) {
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AioContext *aio_context = bdrv_get_aio_context(bs);
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aio_context_acquire(aio_context);
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if (bs->job) {
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block_job_pause(bs->job);
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}
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aio_context_release(aio_context);
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}
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while (busy) {
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busy = false;
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@ -2051,6 +2061,16 @@ void bdrv_drain_all(void)
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aio_context_release(aio_context);
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}
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}
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QTAILQ_FOREACH(bs, &bdrv_states, device_list) {
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AioContext *aio_context = bdrv_get_aio_context(bs);
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aio_context_acquire(aio_context);
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if (bs->job) {
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block_job_resume(bs->job);
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}
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aio_context_release(aio_context);
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}
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}
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/* make a BlockDriverState anonymous by removing from bdrv_state and
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