linux-kernel - Re: [RFC] psi: Add additional PSI counters for each type of memory pressure

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Message-ID: <YYvuRUqcxW0Vu9vp@dhcp22.suse.cz>
Date:   Wed, 10 Nov 2021 17:07:33 +0100
From:   Michal Hocko <mhocko@...e.com>
To:     Georgi Djakov <quic_c_gdjako@...cinc.com>
Cc:     hannes@...xchg.org, vincent.guittot@...aro.org,
        juri.lelli@...hat.com, peterz@...radead.org, mingo@...hat.com,
        rostedt@...dmis.org, bsegall@...gle.com, mgorman@...e.de,
        bristot@...hat.com, vdavydov.dev@...il.com, tj@...nel.org,
        axboe@...nel.dk, cgroups@...r.kernel.org,
        linux-block@...r.kernel.org, akpm@...ux-foundation.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org, djakov@...nel.org
Subject: Re: [RFC] psi: Add additional PSI counters for each type of memory
 pressure

On Wed 10-11-21 07:36:37, Georgi Djakov wrote:
> From: Carlos Ramirez <carlrami@...eaurora.org>
> 
> Calculates psi totals for memory pressure subevents:
> compaction, thrashing, direct compaction, direct reclaim, and kswapd0.
> Uses upper 16 bits of psi_flags to track memory subevents.

Could you elaborate on the definition of those events please? That
should also go to Documentation (Documentation/accounting/psi.rst)
-- 
Michal Hocko
SUSE Labs