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Message-Id: <1070816051332.31325@suse.de> Date: Thu, 16 Aug 2007 15:13:32 +1000 From: NeilBrown <neilb@...e.de> To: Jens Axboe <jens.axboe@...cle.com> Cc: linux-kernel@...r.kernel.org, Tejun Heo <htejun@...il.com> Subject: [PATCH 001 of 5] Don't update bi_hw_*_size if we aren't going to merge. ll_merge_requests_fn can update bi_hw_*_size in one case where we end up not merging. This is wrong. Signed-off-by: Neil Brown <neilb@...e.de> ### Diffstat output ./block/ll_rw_blk.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff .prev/block/ll_rw_blk.c ./block/ll_rw_blk.c --- .prev/block/ll_rw_blk.c 2007-08-16 14:57:39.000000000 +1000 +++ ./block/ll_rw_blk.c 2007-08-16 15:02:29.000000000 +1000 @@ -1518,11 +1518,13 @@ static int ll_merge_requests_fn(struct r /* * propagate the combined length to the end of the requests */ + total_hw_segments--; + if (total_hw_segments > q->max_hw_segments) + return 0; if (req->nr_hw_segments == 1) req->bio->bi_hw_front_size = len; if (next->nr_hw_segments == 1) next->biotail->bi_hw_back_size = len; - total_hw_segments--; } if (total_hw_segments > q->max_hw_segments) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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