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graph-lock: remove AioContext locking

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Stop acquiring/releasing the AioContext lock in
bdrv_graph_wrlock()/bdrv_graph_unlock() since the lock no longer has any
effect.

The distinction between bdrv_graph_wrunlock() and
bdrv_graph_wrunlock_ctx() becomes meaningless and they can be collapsed
into one function.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20231205182011.1976568-6-stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2023-12-05 13:20:02 -05:00 • committed by Kevin Wolf
parent b5f4fda4fb
commit 6bc30f1949
20 changed files with 133 additions and 193 deletions
Download patch file Download diff file Expand all files Collapse all files

12
block/stream.c
View file

@ -99,9 +99,9 @@ static int stream_prepare(Job *job)
}
}
bdrv_graph_wrlock(s->target_bs);
bdrv_graph_wrlock();
bdrv_set_backing_hd_drained(unfiltered_bs, base, &local_err);
bdrv_graph_wrunlock(s->target_bs);
bdrv_graph_wrunlock();
/*
* This call will do I/O, so the graph can change again from here on.
@ -366,10 +366,10 @@ void stream_start(const char *job_id, BlockDriverState *bs,
* already have our own plans. Also don't allow resize as the image size is
* queried only at the job start and then cached.
*/
bdrv_graph_wrlock(bs);
bdrv_graph_wrlock();
if (block_job_add_bdrv(&s->common, "active node", bs, 0,
basic_flags | BLK_PERM_WRITE, errp)) {
bdrv_graph_wrunlock(bs);
bdrv_graph_wrunlock();
goto fail;
}
@ -389,11 +389,11 @@ void stream_start(const char *job_id, BlockDriverState *bs,
ret = block_job_add_bdrv(&s->common, "intermediate node", iter, 0,
basic_flags, errp);
if (ret < 0) {
bdrv_graph_wrunlock(bs);
bdrv_graph_wrunlock();
goto fail;
}
}
bdrv_graph_wrunlock(bs);
bdrv_graph_wrunlock();
s->base_overlay = base_overlay;
s->above_base = above_base;