io context sharing: preliminary support

Detach task state from ioc, instead keep track of how many processes are accessing the ioc.

Jens Axboe committed 18 years ago

Commit d38ecf91 parent fd0928d5 files · +49 −23Browse files

Showing the changes to include/linux/blkdev.h (1 of 5 files). Show all

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@@ -34,7 +34,7 @@ struct sg_io_hdr; · 33 unmodified lines
34	#define BLKDEV_MIN_RQ 4	34	#define BLKDEV_MIN_RQ 4
35	#define BLKDEV_MAX_RQ 128 /* Default maximum */	35	#define BLKDEV_MAX_RQ 128 /* Default maximum */
36		36
37	void put_io_context(struct io_context *ioc);	37	int put_io_context(struct io_context *ioc);
38	void exit_io_context(void);	38	void exit_io_context(void);
39	struct io_context *get_io_context(gfp_t gfp_flags, int node);	39	struct io_context *get_io_context(gfp_t gfp_flags, int node);
40	struct io_context *alloc_io_context(gfp_t gfp_flags, int node);	40	struct io_context *alloc_io_context(gfp_t gfp_flags, int node);