Commit c43a5082 authored by Jens Axboe's avatar Jens Axboe Committed by Linus Torvalds

[PATCH] blktrace: only add a bounce trace when we really bounce

Currently we issue a bounce trace when __blk_queue_bounce() is called,
but that merely means that the device has a lower dma mask than the
higher pages in the system. The bio itself may still be lower pages. So
move the bounce trace into __blk_queue_bounce(), when we know there will
actually be page bouncing.
Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent d39c9400
......@@ -237,6 +237,8 @@ static void __blk_queue_bounce(request_queue_t *q, struct bio **bio_orig,
if (!bio)
return;
blk_add_trace_bio(q, *bio_orig, BLK_TA_BOUNCE);
/*
* at least one page was bounced, fill in possible non-highmem
* pages
......@@ -291,8 +293,6 @@ void blk_queue_bounce(request_queue_t *q, struct bio **bio_orig)
pool = isa_page_pool;
}
blk_add_trace_bio(q, *bio_orig, BLK_TA_BOUNCE);
/*
* slow path
*/
......
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