lkml.org 
[lkml]   [2018]   [Nov]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH V10 17/19] block: don't use bio->bi_vcnt to figure out segment number
On Thu, Nov 15, 2018 at 04:53:04PM +0800, Ming Lei wrote:
> It is wrong to use bio->bi_vcnt to figure out how many segments
> there are in the bio even though CLONED flag isn't set on this bio,
> because this bio may be splitted or advanced.
>
> So always use bio_segments() in blk_recount_segments(), and it shouldn't
> cause any performance loss now because the physical segment number is figured
> out in blk_queue_split() and BIO_SEG_VALID is set meantime since
> bdced438acd83ad83a6c ("block: setup bi_phys_segments after splitting").

Looks good, but shouldn't this go to the beginning of the series?

Reviewed-by: Christoph Hellwig <hch@lst.de>

\
 
 \ /
  Last update: 2018-11-16 14:56    [W:0.464 / U:2.536 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site