On Wed, Jun 15, 2016 at 01:16:42PM +0200, Kevin Wolf wrote: > linux-aio uses a BH in order to make sure that the remaining completions > are processed even in nested event loops of completion callbacks in > order to avoid deadlocks. > > There is no need, however, to have the BH overhead for the first call > into qemu_laio_completion_bh() or after all pending completions have > already been processed. Therefore, this patch calls directly into > qemu_laio_completion_bh() in qemu_laio_completion_cb() and cancels > the BH after qemu_laio_completion_bh() has processed all pending > completions. > > Signed-off-by: Kevin Wolf <kw...@redhat.com> > --- > block/linux-aio.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-)
Reviewed-by: Stefan Hajnoczi <stefa...@redhat.com>
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