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block: explicitly acquire aiocontext in bottom halves that need it

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Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 20170213135235.12274-15-pbonzini@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Paolo Bonzini 2017-02-13 14:52:31 +01:00 • committed by Stefan Hajnoczi
parent 9d45665448
commit 1919631e6b
17 changed files with 71 additions and 28 deletions
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6
block/io.c
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@ -189,7 +189,7 @@ static void bdrv_co_drain_bh_cb(void *opaque)
bdrv_dec_in_flight(bs);
bdrv_drained_begin(bs);
data->done = true;
qemu_coroutine_enter(co);
aio_co_wake(co);
}
static void coroutine_fn bdrv_co_yield_to_drain(BlockDriverState *bs)
@ -2152,9 +2152,13 @@ static void bdrv_co_complete(BlockAIOCBCoroutine *acb)
static void bdrv_co_em_bh(void *opaque)
{
BlockAIOCBCoroutine *acb = opaque;
BlockDriverState *bs = acb->common.bs;
AioContext *ctx = bdrv_get_aio_context(bs);
assert(!acb->need_bh);
aio_context_acquire(ctx);
bdrv_co_complete(acb);
aio_context_release(ctx);
}
static void bdrv_co_maybe_schedule_bh(BlockAIOCBCoroutine *acb)