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AioContext: acquire/release AioContext during aio_poll

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This is the first step in pushing down acquire/release, and will let
rfifolock drop the contention callback feature.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 1424449612-18215-3-git-send-email-pbonzini@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Paolo Bonzini 2015-02-20 17:26:51 +01:00 • committed by Kevin Wolf
parent e98ab09709
commit 49110174f8
3 changed files with 24 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

9
aio-posix.c
View file

@ -238,6 +238,7 @@ bool aio_poll(AioContext *ctx, bool blocking)
bool progress;
int64_t timeout;
aio_context_acquire(ctx);
was_dispatching = ctx->dispatching;
progress = false;
@ -267,7 +268,13 @@ bool aio_poll(AioContext *ctx, bool blocking)
timeout = blocking ? aio_compute_timeout(ctx) : 0;
/* wait until next event */
if (timeout) {
aio_context_release(ctx);
}
ret = qemu_poll_ns((GPollFD *)pollfds, npfd, timeout);
if (timeout) {
aio_context_acquire(ctx);
}
/* if we have any readable fds, dispatch event */
if (ret > 0) {
@ -286,5 +293,7 @@ bool aio_poll(AioContext *ctx, bool blocking)
}
aio_set_dispatching(ctx, was_dispatching);
aio_context_release(ctx);
return progress;
}