Re: block: Allow merging of tail pages into the last segment

[Jan Vesely <jvesely@redhat.com>]

On 28/03/13 10:38, Jan Vesely wrote:
> Hi
> 
> These patches modify __bio_add_page to accept pages that extent the last bio
> segment. some drivers craft their buffers and rely on this behavior (see
> message in patch 2 for details)

any comments on this version would be appreciated

thanks

> 
> jan
> 
> v3: Use code from __blk_recalc_rq_segments to decide whether the page is
>     mergeable, 
> 
> v2: modify a comment
> 
> Jan Vesely (2):
>       block: factor out vector mergeable decision to a helper function
>       block: modify __bio_add_page check to accept pages that don't start a new
> 
>  block/blk-merge.c   | 52 +++++++++++++++++++++++++++++++---------------------
>  fs/bio.c            | 29 ++++++++++++++++++-----------
>  include/linux/bio.h |  3 +++
>  3 files changed, 52 insertions(+), 32 deletions(-)
> 
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-- 
Jan Vesely <jvesely@redhat.com>