linux-kernel - Re: [PATCH 7/7] mm, vmscan: add mm_vmscan_inactive_list_is

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Message-ID: <06db01d261ac$44a57910$cdf06b30$@alibaba-inc.com>
Date:   Thu, 29 Dec 2016 16:19:25 +0800
From:   "Hillf Danton" <hillf.zj@...baba-inc.com>
To:     "'Michal Hocko'" <mhocko@...nel.org>, <linux-mm@...ck.org>
Cc:     "'Andrew Morton'" <akpm@...ux-foundation.org>,
        "'Mel Gorman'" <mgorman@...e.de>,
        "'Johannes Weiner'" <hannes@...xchg.org>,
        "'Vlastimil Babka'" <vbabka@...e.cz>,
        "'Rik van Riel'" <riel@...hat.com>,
        "'LKML'" <linux-kernel@...r.kernel.org>,
        "'Michal Hocko'" <mhocko@...e.com>
Subject: Re: [PATCH 7/7] mm, vmscan: add mm_vmscan_inactive_list_is_low tracepoint

On Wednesday, December 28, 2016 11:31 PM Michal Hocko wrote: 
> From: Michal Hocko <mhocko@...e.com>
> 
> Currently we have tracepoints for both active and inactive LRU lists
> reclaim but we do not have any which would tell us why we we decided to
> age the active list. Without that it is quite hard to diagnose
> active/inactive lists balancing. Add mm_vmscan_inactive_list_is_low
> tracepoint to tell us this information.
> 
> Signed-off-by: Michal Hocko <mhocko@...e.com>
> ---
Acked-by: Hillf Danton <hillf.zj@...baba-inc.com>