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aio: push aio_context_acquire/release down to dispatching

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The AioContext data structures are now protected by list_lock and/or
they are walked with FOREACH_RCU primitives.  There is no need anymore
to acquire the AioContext for the entire duration of aio_dispatch.
Instead, just acquire it before and after invoking the callbacks.
The next step is then to push it further down.

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: 20170213135235.12274-12-pbonzini@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Paolo Bonzini 2017-02-13 14:52:28 +01:00 • committed by Stefan Hajnoczi
parent b20123a28b
commit 0836c72f70
3 changed files with 20 additions and 22 deletions
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2
util/async.c
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@ -114,7 +114,9 @@ int aio_bh_poll(AioContext *ctx)
ret = 1;
}
bh->idle = 0;
aio_context_acquire(ctx);
aio_bh_call(bh);
aio_context_release(ctx);
}
if (bh->deleted) {
deleted = true;