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io context sharing: preliminary support

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

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Jens Axboe 2008-01-24 08:53:35 +01:00
parent fd0928df98
commit d38ecf935f
5 changed files with 49 additions and 23 deletions
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2
include/linux/blkdev.h
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@ -34,7 +34,7 @@ struct sg_io_hdr;
#define BLKDEV_MIN_RQ 4
#define BLKDEV_MAX_RQ 128 /* Default maximum */
void put_io_context(struct io_context *ioc);
int put_io_context(struct io_context *ioc);
void exit_io_context(void);
struct io_context *get_io_context(gfp_t gfp_flags, int node);
struct io_context *alloc_io_context(gfp_t gfp_flags, int node);