linux-kernel - Re: [PATCH 4/6] lib/scatterlist: Unexport some trivial wrappers

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Message-ID: <1520439540.2890.19.camel@wdc.com>
Date:   Wed, 7 Mar 2018 16:19:01 +0000
From:   Bart Van Assche <Bart.VanAssche@....com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "tursulin@...ulin.net" <tursulin@...ulin.net>
CC:     "tvrtko.ursulin@...el.com" <tvrtko.ursulin@...el.com>,
        "hare@...e.com" <hare@...e.com>,
        "jthumshirn@...e.de" <jthumshirn@...e.de>,
        "axboe@...nel.dk" <axboe@...nel.dk>
Subject: Re: [PATCH 4/6] lib/scatterlist: Unexport some trivial wrappers

On Wed, 2018-03-07 at 12:47 +0000, Tvrtko Ursulin wrote:
> Save some kernel size by moving trivial wrappers to header as static
> inline instead of exporting symbols for them.

Something that you may be unaware of is that the introduction of the sgl
helper functions is only a first step. The next step will be to introduce
a caching allocator for sg-lists. So for small sg-lists inlining won't
help performance. But moving these definitions from a .c file into a .h
file will (slightly) slow down kernel compilation. So I'd prefer that you
drop this patch.

Thanks,

Bart.