On Wed, Sep 17, 2014 at 10:22 PM, Jens Axboe <axboe@xxxxxxxxx> wrote: > > Another way would be to ensure that the timeout handler doesn't touch hw_ctx > or tag_sets that aren't fully initialized yet. But I think this is > safer/cleaner. That may not be easy or enough to check if hw_ctx/tag_sets are fully initialized if you mean all requests have been used one time. On Wed, Sep 17, 2014 at 10:11 PM, David Hildenbrand > I was playing with a simple patch that just sets cmd_flags and action_flags to What is action_flags? > 0. That should already be sufficient to hinder blk_mq_tag_to_rq and the calling > method to do the wrong thing. Yes, clearing rq->cmd_flags should be enough. And looks better to move rq initialization to __blk_mq_free_request() too, otherwise timeout still may see old cmd_flags and rq->q before rq's new initialization. Thanks, -- Ming Lei _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
