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H A D | trans_virtio.c | diff 31934da810365f603dec5a67e690e00cf900fc73 Thu Jul 19 02:17:00 CDT 2018 jiangyiwen <jiangyiwen@huawei.com> net/9p/virtio: Fix hard lockup in req_done
When client has multiple threads that issue io requests all the time, and the server has a very good performance, it may cause cpu is running in the irq context for a long time because it can check virtqueue has buf in the *while* loop.
So we should keep chan->lock in the whole loop.
[ Dominique: reworded subject line ] Link: http://lkml.kernel.org/r/5B503AEC.5080404@huawei.com Signed-off-by: Yiwen Jiang <jiangyiwen@huawei.com> To: Andrew Morton <akpm@linux-foundation.org> To: Eric Van Hensbergen <ericvh@gmail.com> To: Ron Minnich <rminnich@sandia.gov> To: Latchesar Ionkov <lucho@ionkov.net> Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr>
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