linux-kernel - Re: [PATCH v2 2/4] mm/vmscan: remove redundant current_may

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Message-ID: <20180406161019.GC20806@cmpxchg.org>
Date:   Fri, 6 Apr 2018 12:10:19 -0400
From:   Johannes Weiner <hannes@...xchg.org>
To:     Andrey Ryabinin <aryabinin@...tuozzo.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Tejun Heo <tj@...nel.org>, Michal Hocko <mhocko@...nel.org>,
        Shakeel Butt <shakeelb@...gle.com>,
        Steven Rostedt <rostedt@...dmis.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, cgroups@...r.kernel.org
Subject: Re: [PATCH v2 2/4] mm/vmscan: remove redundant
 current_may_throttle() check

On Fri, Mar 23, 2018 at 06:20:27PM +0300, Andrey Ryabinin wrote:
> Only kswapd can have non-zero nr_immediate, and current_may_throttle() is
> always true for kswapd (PF_LESS_THROTTLE bit is never set) thus it's
> enough to check stat.nr_immediate only.
> 
> Signed-off-by: Andrey Ryabinin <aryabinin@...tuozzo.com>
> Acked-by: Michal Hocko <mhocko@...e.com>

Acked-by: Johannes Weiner <hannes@...xchg.org>