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From: Michal Hocko <mhocko@kernel.org>
To: Daniel Colascione <dancol@google.com>
Cc: Minchan Kim <minchan@kernel.org>,
	linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>,
	Oleg Nesterov <oleg@redhat.com>,
	Peter Zijlstra <peterz@infradead.org>
Subject: Re: [PATCH] Synchronize task mm counters on context switch
Date: Fri, 23 Feb 2018 09:11:47 +0100	[thread overview]
Message-ID: <20180223081147.GD30773@dhcp22.suse.cz> (raw)
In-Reply-To: <CAKOZuev67HPpK5x4zS88x0C2AysvSk5wcFS0DuT3A_04p1HpSQ@mail.gmail.com>

On Wed 21-02-18 18:49:35, Daniel Colascione wrote:
[...]
> For more context: on Android, we've historically scanned each processes's
> address space using /proc/pid/smaps (and /proc/pid/smaps_rollup more
> recently) to extract memory management statistics. We're looking at
> replacing this mechanism with the new /proc/pid/status per-memory-type
> (e.g., anonymous, file-backed) counters so that we can be even more
> efficient, but we'd like the counts we collect to be accurate.

If you need the accuracy then why don't you simply make
SPLIT_RSS_COUNTING configurable and disable it in your setup?
-- 
Michal Hocko
SUSE Labs

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  reply	other threads:[~2018-02-23  8:11 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-02-05 22:03 [PATCH] Synchronize task mm counters on context switch Daniel Colascione
2018-02-21 19:05 ` Daniel Colascione
2018-02-22  0:16   ` Minchan Kim
2018-02-22  0:23     ` Daniel Colascione
2018-02-22  2:06       ` Minchan Kim
2018-02-22  2:46         ` [PATCH] Synchronize task mm counters on demand Daniel Colascione
2018-02-23  2:01           ` Minchan Kim
2018-02-23  2:09             ` Daniel Colascione
2018-02-23  2:24               ` Daniel Colascione
2018-02-23  2:28               ` Minchan Kim
2018-02-23  2:43                 ` Daniel Colascione
2018-02-23  3:12                   ` Minchan Kim
2018-02-23  9:50           ` f66871fb4c: WARNING:inconsistent_lock_state kernel test robot
2018-02-22  2:49         ` [PATCH] Synchronize task mm counters on context switch Daniel Colascione
2018-02-23  8:11           ` Michal Hocko [this message]
2018-02-23 16:34             ` Daniel Colascione
2018-02-23 17:50               ` Michal Hocko
2018-02-23 18:47                 ` Daniel Colascione
2018-02-27 10:02                   ` Michal Hocko
2018-02-22  9:40         ` Peter Zijlstra
2018-02-22 13:06           ` Minchan Kim
2018-02-22 16:23           ` Daniel Colascione

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