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[213.175.37.10]) by smtp.gmail.com with ESMTPSA id j10sm44012622wrb.0.2019.05.13.05.01.18 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Mon, 13 May 2019 05:01:18 -0700 (PDT) Date: Mon, 13 May 2019 14:01:17 +0200 From: Oleksandr Natalenko To: Timofey Titovets Cc: Kirill Tkhai , Linux Kernel , Vlastimil Babka , Michal Hocko , Matthew Wilcox , Pavel Tatashin , Aaron Tomlin , linux-mm@kvack.org Subject: Re: [PATCH RFC 0/4] mm/ksm: add option to automerge VMAs Message-ID: <20190513120117.aeiij4v2ncu43yxt@butterfly.localdomain> References: <20190510072125.18059-1-oleksandr@redhat.com> <36a71f93-5a32-b154-b01d-2a420bca2679@virtuozzo.com> <20190513113314.lddxv4kv5ajjldae@butterfly.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: NeoMutt/20180716 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 Mon, May 13, 2019 at 02:48:29PM +0300, Timofey Titovets wrote: > > Also, just for the sake of another piece of stats here: > > > > $ echo "$(cat /sys/kernel/mm/ksm/pages_sharing) * 4 / 1024" | bc > > 526 > > IIRC, for calculate saving you must use (pages_shared - pages_sharing) Based on Documentation/ABI/testing/sysfs-kernel-mm-ksm: pages_shared: how many shared pages are being used. pages_sharing: how many more sites are sharing them i.e. how much saved. and unless I'm missing something, this must be already accounted: [~]$ echo "$(cat /sys/kernel/mm/ksm/pages_shared) * 4 / 1024" | bc 69 [~]$ echo "$(cat /sys/kernel/mm/ksm/pages_sharing) * 4 / 1024" | bc 563 -- Best regards, Oleksandr Natalenko (post-factum) Senior Software Maintenance Engineer