On Wed, Aug 8, 2018 at 4:22 PM, Jianchao Wang <jianchao.w.wang@xxxxxxxxxx> wrote: > Currently, we count the hctx as active after allocate tag > successfully. The other shared-tags users could exhaust the tags > and starve a non-active and waiting-tag hctx. Count the hctx as > active before try to allocate tag to fix this. This patch looks fine. > > Signed-off-by: Jianchao Wang <jianchao.w.wang@xxxxxxxxxx> > --- > block/blk-mq.c | 6 +++++- > 1 file changed, 5 insertions(+), 1 deletion(-) > > diff --git a/block/blk-mq.c b/block/blk-mq.c > index ae44e85..acd40eb 100644 > --- a/block/blk-mq.c > +++ b/block/blk-mq.c > @@ -369,6 +369,8 @@ static struct request *blk_mq_get_request(struct request_queue *q, > e->type->ops.mq.limit_depth(op, data); > } > > + blk_mq_tag_busy(data.hctx); > + blk_mq_tag_busy is only required for driver tag. Thanks, Ming Lei
