Dear all: I found there is a member of request_queue, bounce_pfn and it will be set up by calling blk_queue_bounce_limit. it seems someone will use that when calling blk_queue_bounce, but what and when it will be called? -- Appreciate your help, _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies