Messages in this thread Patch in this message | | | Date | Wed, 8 Sep 2010 02:00:01 +0200 | From | Christoph Hellwig <> | Subject | Re: [PATCH 42/41] dm: convey that all flushes are processed as empty |
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On Tue, Sep 07, 2010 at 07:49:18PM -0400, Mike Snitzer wrote: > if (!(bio->bi_rw & REQ_FLUSH) || !bio->bi_size) { > + /* done with normal IO or empty flush */ > trace_block_bio_complete(md->queue, bio); > bio_endio(bio, io_error); > } else {
To clarify this further I'd reorder the checks:
if ((bio->bi_rw & REQ_FLUSH) && bio->bi_size) { /* * Preflush done, ... */ } else { }
> @@ -1302,20 +1302,17 @@ static void __split_and_process_bio(struct mapped_device *md, struct bio *bio) > ci.sector = bio->bi_sector; > ci.idx = bio->bi_idx; > > + start_io_acct(ci.io); > if (!is_flush) {
no need for the is_flush anymore now that it's only used once. Again, I think avoiding negatives without a reason in if statement usually makes the code a bit more clear.
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