[PATCH] struct request: shrink and optimize some more (e6a1c874) · Commits · 戴 / test

include/linux/blkdev.h

+13 −7

Original line number	Diff line number	Diff line
		@@ -211,6 +211,8 @@ struct request {
		struct list_head queuelist;
		struct list_head donelist;

		request_queue_t *q;

		unsigned int cmd_flags;
		enum rq_cmd_type_bits cmd_type;

		@@ -219,12 +221,12 @@ struct request {
		*/

		sector_t sector; /* next sector to submit */
		sector_t hard_sector; /* next sector to complete */
		unsigned long nr_sectors; /* no. of sectors left to submit */
		unsigned long hard_nr_sectors; /* no. of sectors left to complete */
		/* no. of sectors left to submit in the current segment */
		unsigned int current_nr_sectors;

		sector_t hard_sector; /* next sector to complete */
		unsigned long hard_nr_sectors; /* no. of sectors left to complete */
		/* no. of sectors left to complete in the current segment */
		unsigned int hard_cur_sectors;

		@@ -232,7 +234,15 @@ struct request {
		struct bio *biotail;

		struct hlist_node hash; /* merge hash */
		/*
		* The rb_node is only used inside the io scheduler, requests
		* are pruned when moved to the dispatch queue. So let the
		* completion_data share space with the rb_node.
		*/
		union {
		struct rb_node rb_node; /* sort/lookup */
		void *completion_data;
		};

		/*
		* two pointers are available for the IO schedulers, if they need
		@@ -241,8 +251,6 @@ struct request {
		void *elevator_private;
		void *elevator_private2;

		void *completion_data;

		struct gendisk *rq_disk;
		unsigned long start_time;

		@@ -260,8 +268,6 @@ struct request {

		unsigned short ioprio;

		request_queue_t *q;

		void *special;
		char *buffer;