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[79.242.61.205]) by smtp.gmail.com with ESMTPSA id z5sm1326474wru.87.2021.12.16.03.01.51 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 16 Dec 2021 03:01:52 -0800 (PST) Message-ID: Date: Thu, 16 Dec 2021 12:01:51 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.2.0 Subject: Re: [PATCH] docs/vm: clarify overcommit amount sysctl behavior To: Matthew Wilcox , Anssi Hannula Cc: Jonathan Corbet , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org References: <20211211194159.3137362-1-anssi.hannula@iki.fi> From: David Hildenbrand Organization: Red Hat In-Reply-To: X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Authentication-Results: imf19.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=HQKbo+sE; dmarc=pass (policy=none) header.from=redhat.com; spf=none (imf19.hostedemail.com: domain of david@redhat.com has no SPF policy when checking 170.10.129.124) smtp.mailfrom=david@redhat.com X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 7E3D01A001B X-Stat-Signature: cf4ccpn6rus5aqf7hh6x6c1hhxaarucs X-HE-Tag: 1639652515-726109 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 11.12.21 23:21, Matthew Wilcox wrote: > On Sat, Dec 11, 2021 at 09:41:59PM +0200, Anssi Hannula wrote: >> Documentation/vm/overcommit-accounting.rst says that the overcommit >> amount can be set via vm.overcommit_ratio and vm.overcommit_kbytes. >> >> Add a clarification that those only take effect in overcommit handling >> mode 2 ("Don't overcommit"), i.e. they do not act as an "additional" >> limit that is always enforced. >> >> Signed-off-by: Anssi Hannula >> --- > > Simple and clear improvement, IMO. Cc'ing linux-mm to get more eyes on > it. As I had the same idea to just make this clearer in the context of advanced documentation for virtio-mem, so I approve :) Reviewed-by: David Hildenbrand -- Thanks, David / dhildenb