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[37.188.180.223]) by smtp.gmail.com with ESMTPSA id e2sm1309730wrv.89.2020.04.14.11.35.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Apr 2020 11:35:42 -0700 (PDT) Date: Tue, 14 Apr 2020 20:35:41 +0200 From: Michal Hocko To: svc_lmoiseichuk@magicleap.com Cc: hannes@cmpxchg.org, vdavydov.dev@gmail.com, tj@kernel.org, lizefan@huawei.com, cgroups@vger.kernel.org, akpm@linux-foundation.org, rientjes@google.com, minchan@kernel.org, vinmenon@codeaurora.org, andriy.shevchenko@linux.intel.com, penberg@kernel.org, linux-mm@kvack.org, Leonid Moiseichuk Subject: Re: [PATCH v1 0/2] memcg, vmpressure: expose vmpressure controls Message-ID: <20200414183541.GS4629@dhcp22.suse.cz> References: <20200414171840.22053-1-lmoiseichuk@magicleap.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200414171840.22053-1-lmoiseichuk@magicleap.com> X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Tue 14-04-20 13:18:38, svc_lmoiseichuk@magicleap.com wrote: > From: Leonid Moiseichuk > > Small tweak to populate vmpressure parameters to userspace without > any built-in logic change. > > The vmpressure is used actively (e.g. on Android) to track mm stress. > vmpressure parameters selected empiricaly quite long time ago and not > always suitable for modern memory configurations. Modern 8 GB devices > starts triggering medium threshold when about 3 GB memory not used, > and situation with 12 and 16 GB devices even worse. I am sorry but this doesn't answer questions I've had for the previous version of the patch. Please do not post newer versions until there is a consensusn on the approach based on the review feedback. In order to not fragment the discussion, let's continue in the original email thread http://lkml.kernel.org/r/20200413215750.7239-1-lmoiseichuk@magicleap.com -- Michal Hocko SUSE Labs