From fc0a75ce4835187a3f76d6b35f0644d1b168eef5 Mon Sep 17 00:00:00 2001 From: Nathan Scott Date: Thu, 6 Jul 2006 09:56:30 +0200 Subject: [PATCH] blktrace: fix barrier vs sync typo Signed-off-by: Nathan Scott Signed-off-by: Jens Axboe --- include/linux/blktrace_api.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux/blktrace_api.h') diff --git a/include/linux/blktrace_api.h b/include/linux/blktrace_api.h index a7e8cef73d1..d95615fc6da 100644 --- a/include/linux/blktrace_api.h +++ b/include/linux/blktrace_api.h @@ -11,7 +11,7 @@ enum blktrace_cat { BLK_TC_READ = 1 << 0, /* reads */ BLK_TC_WRITE = 1 << 1, /* writes */ BLK_TC_BARRIER = 1 << 2, /* barrier */ - BLK_TC_SYNC = 1 << 3, /* barrier */ + BLK_TC_SYNC = 1 << 3, /* sync IO */ BLK_TC_QUEUE = 1 << 4, /* queueing/merging */ BLK_TC_REQUEUE = 1 << 5, /* requeueing */ BLK_TC_ISSUE = 1 << 6, /* issue */ -- cgit v1.2.3 From 40359ccb836866435b03a0cb57345002b587d875 Mon Sep 17 00:00:00 2001 From: Nathan Scott Date: Thu, 6 Jul 2006 10:03:28 +0200 Subject: [PATCH] blktrace: readahead support Provide the needed kernel support for distinguishing readahead from regular read requests when tracing block devices. Signed-off-by: Nathan Scott Signed-off-by: Jens Axboe --- include/linux/blktrace_api.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux/blktrace_api.h') diff --git a/include/linux/blktrace_api.h b/include/linux/blktrace_api.h index d95615fc6da..2346a1db856 100644 --- a/include/linux/blktrace_api.h +++ b/include/linux/blktrace_api.h @@ -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 */ }; -- cgit v1.2.3 From 1959d21232931dfa686769a21161413f10d6652f Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Thu, 6 Jul 2006 10:18:05 +0200 Subject: [PATCH] Only the first two bits in bio->bi_rw and rq->flags match Not three, as assumed. This causes the barrier bit to be needlessly set for some IO. Signed-off-by: Jens Axboe --- include/linux/blktrace_api.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux/blktrace_api.h') diff --git a/include/linux/blktrace_api.h b/include/linux/blktrace_api.h index 2346a1db856..7520cc1ff9e 100644 --- a/include/linux/blktrace_api.h +++ b/include/linux/blktrace_api.h @@ -148,7 +148,7 @@ static inline void blk_add_trace_rq(struct request_queue *q, struct request *rq, u32 what) { struct blk_trace *bt = q->blk_trace; - int rw = rq->flags & 0x07; + int rw = rq->flags & 0x03; if (likely(!bt)) return; -- cgit v1.2.3