Re: [PATCH] likely cleanup: revert unlikely in ll_back_merge_fn

[Jens Axboe <axboe@suse.de>]

On Wed, Apr 26 2006, James Bottomley wrote:
> On Wed, 2006-04-26 at 07:20 +0200, Jens Axboe wrote:
> > But blk_recount_segments() sets the BIO_SEG_VALID flag. Ugh ok
> > __bio_add_page() basically kills the flag. James, I think you are the
> > author of that addition, does it really need to be so restrictive?
> > 
> >         /* If we may be able to merge these biovecs, force a recount */
> >         if (bio->bi_vcnt && (BIOVEC_PHYS_MERGEABLE(bvec-1, bvec) ||
> >             BIOVEC_VIRT_MERGEABLE(bvec-1, bvec)))
> >                 bio->bi_flags &= ~(1 << BIO_SEG_VALID);
> 
> Help me out here ... I can't find this chunk of code in the current
> tree.  Where is it?

Sorry, should have mentioned that. Current git tree (or 2.6.16 should be
the same), fs/bio.c:__bio_add_page():401.

-- 
Jens Axboe

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