linux-kernel - Re: Possible bio merging breakage in mp bio rework

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Message-ID: <b9a33021-bb4f-1f11-13c9-80a5d39e2004@suse.de>
Date:   Mon, 8 Apr 2019 12:22:22 +0200
From:   Johannes Thumshirn <jthumshirn@...e.de>
To:     Ming Lei <ming.lei@...hat.com>
Cc:     Nikolay Borisov <nborisov@...e.com>, Jens Axboe <axboe@...nel.dk>,
        Omar Sandoval <osandov@...ndov.com>,
        linux-block@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
        linux-btrfs <linux-btrfs@...r.kernel.org>
Subject: Re: Possible bio merging breakage in mp bio rework

On 08/04/2019 12:19, Ming Lei wrote:
> bio_add_page() is absolutely the fast path, and it is much more efficient
> to apply the limit just once in the queue's .make_request_fn.

You're right, this makes sense.

Thanks,
	Johannes
-- 
Johannes Thumshirn                            SUSE Labs Filesystems
jthumshirn@...e.de                                +49 911 74053 689
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