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blktrace: port to tracepoints

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This was a forward port of work done by Mathieu Desnoyers, I changed it to
encode the 'what' parameter on the tracepoint name, so that one can register
interest in specific events and not on classes of events to then check the
'what' parameter.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Arnaldo Carvalho de Melo
2008-10-30 08:34:33 +01:00
committed by Ingo Molnar
parent 509dceef64
commit 5f3ea37c77
9 changed files with 418 additions and 199 deletions
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3
mm/bounce.c
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@@ -14,6 +14,7 @@
#include <linux/hash.h>
#include <linux/highmem.h>
#include <linux/blktrace_api.h>
#include <trace/block.h>
#include <asm/tlbflush.h>
#define POOL_SIZE 64
@@ -222,7 +223,7 @@ static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig,
if (!bio)
return;
blk_add_trace_bio(q, *bio_orig, BLK_TA_BOUNCE);
trace_block_bio_bounce(q, *bio_orig);
/*
* at least one page was bounced, fill in possible non-highmem