linux-kernel - Re: [PATCH 02/11] blk: make the bioset rescue

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Message-ID: <20170424151013.GA17867@infradead.org>
Date:   Mon, 24 Apr 2017 08:10:13 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     NeilBrown <neilb@...e.com>
Cc:     Christoph Hellwig <hch@...radead.org>,
        Jens Axboe <axboe@...nel.dk>, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 02/11] blk: make the bioset rescue_workqueue optional.

On Mon, Apr 24, 2017 at 11:51:01AM +1000, NeilBrown wrote:
> 
> I was following the existing practice exemplified by
> bioset_create_nobvec().

Which is pretty ugly to start with..

> By not changing the signature of the function, I can avoid touching
> quite a few places where it is called.

There are 13 callers of bioset_create and one caller of
bioset_create_nobvec, and your series touches many of those.

So just adding a flags argument to bioset_create and passing
BIOSET_NEED_BVECS and BIOSET_NEED_RESUER flags to it doesn't seem
to much of an effort, and it's going to create a much nicer and easier
to extend interface.