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[PATCH] Allow file systems to differentiate between data and meta reads

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We can use this information for making more intelligent priority
decisions, and it will also be useful for blktrace.

Signed-off-by: Jens Axboe <axboe@suse.de>
This commit is contained in:
Jens Axboe
2006-08-10 09:01:02 +02:00
committed by Jens Axboe
parent da20a20f3b
commit 5404bc7a87
4 changed files with 8 additions and 0 deletions
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include/linux/fs.h
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@ -80,6 +80,7 @@ extern int dir_notify_enable;
#define READA 2 /* read-ahead - don't block if no resources */
#define SWRITE 3 /* for ll_rw_block() - wait for buffer lock */
#define READ_SYNC (READ | (1 << BIO_RW_SYNC))
#define READ_META (READ | (1 << BIO_RW_META))
#define WRITE_SYNC (WRITE | (1 << BIO_RW_SYNC))
#define WRITE_BARRIER ((1 << BIO_RW) | (1 << BIO_RW_BARRIER))