linux-kernel - Re: [PATCH 6/6] swap, put_swap_page: Share more between huge/normal code path

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Date:   Sat, 14 Jul 2018 20:57:07 +0800
From:   "Huang\, Ying" <ying.huang@...el.com>
To:     Daniel Jordan <daniel.m.jordan@...cle.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>, <linux-mm@...ck.org>,
        <linux-kernel@...r.kernel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Michal Hocko <mhocko@...e.com>,
        Johannes Weiner <hannes@...xchg.org>,
        "Shaohua Li" <shli@...nel.org>, Hugh Dickins <hughd@...gle.com>,
        Minchan Kim <minchan@...nel.org>,
        Rik van Riel <riel@...hat.com>,
        Dan Williams <dan.j.williams@...el.com>
Subject: Re: [PATCH 6/6] swap, put_swap_page: Share more between huge/normal code path

Daniel Jordan <daniel.m.jordan@...cle.com> writes:

> On Fri, Jul 13, 2018 at 07:36:36AM +0800, Huang, Ying wrote:
>> From: Huang Ying <ying.huang@...el.com>
>> 
>> In this patch, locking related code is shared between huge/normal code
>> path in put_swap_page() to reduce code duplication.  And `free_entries
>> == 0` case is merged into more general `free_entries !=
>> SWAPFILE_CLUSTER` case, because the new locking method makes it easy.
>
> Might be a bit easier to think about the two changes if they were split up.

I just think the second change appears too trivial to be a separate patch.

> Agree with Dave's comment from patch 1, but otherwise the series looks ok to
> me.  I like the nr_swap_entries macro, that's clever.

Thanks!

Best Regards,
Huang, Ying