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[PATCH] blktrace: readahead support

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Provide the needed kernel support for distinguishing readahead
from regular read requests when tracing block devices.

Signed-off-by: Nathan Scott <nathans@sgi.com>
Signed-off-by: Jens Axboe <axboe@suse.de>
This commit is contained in:
Nathan Scott
2006-07-06 10:03:28 +02:00
committed by Jens Axboe
parent fc0a75ce48
commit 40359ccb83
2 changed files with 5 additions and 1 deletions
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include/linux/blktrace_api.h
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@ -19,6 +19,7 @@ enum blktrace_cat {
BLK_TC_FS = 1 << 8, /* fs requests */
BLK_TC_PC = 1 << 9, /* pc requests */
BLK_TC_NOTIFY = 1 << 10, /* special message */
BLK_TC_AHEAD = 1 << 11, /* readahead */
BLK_TC_END = 1 << 15, /* only 16-bits, reminder */
};