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

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Message-ID: <20180713201858.zj43xzsnxqk3ozks@ca-dmjordan1.us.oracle.com>
Date:   Fri, 13 Jul 2018 13:18:58 -0700
From:   Daniel Jordan <daniel.m.jordan@...cle.com>
To:     "Huang, Ying" <ying.huang@...el.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>,
        Daniel Jordan <daniel.m.jordan@...cle.com>,
        Dan Williams <dan.j.williams@...el.com>
Subject: Re: [PATCH 6/6] swap, put_swap_page: Share more between huge/normal
 code path

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.

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.