linux-kernel - Re: [PATCH 00/13] convert block layer to bioset_init()/mempool

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Date:   Mon, 21 May 2018 08:19:58 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Mike Snitzer <snitzer@...hat.com>,
        Kent Overstreet <kent.overstreet@...il.com>
Cc:     linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
        hch@...radead.org, colyli@...e.de, darrick.wong@...cle.com,
        clm@...com, bacik@...com, linux-xfs@...r.kernel.org,
        drbd-dev@...ts.linbit.com, linux-btrfs@...r.kernel.org,
        linux-raid@...r.kernel.org, neilb@...e.com
Subject: Re: [PATCH 00/13] convert block layer to bioset_init()/mempool_init()

On 5/21/18 8:03 AM, Mike Snitzer wrote:
> On Sun, May 20 2018 at  6:25pm -0400,
> Kent Overstreet <kent.overstreet@...il.com> wrote:
> 
>> Jens - this series does the rest of the conversions that Christoph wanted, and
>> drops bioset_create().
>>
>> Only lightly tested, but the changes are pretty mechanical. Based on your
>> for-next tree.
> 
> By switching 'mempool_t *' to 'mempool_t' and 'bio_set *' to 'bio_set'
> you've altered the alignment of members in data structures.  So I'll
> need to audit all the data structures you've modified in DM.
> 
> Could we get the backstory on _why_ you're making this change?
> Would go a long way to helping me appreciate why this is a good use of
> anyone's time.

Yeah, it's in the first series, it gets rid of a pointer indirection.

-- 
Jens Axboe