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[92.23.123.10]) by smtp.gmail.com with ESMTPSA id b68sm12740964wme.6.2019.12.27.16.25.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 27 Dec 2019 16:25:06 -0800 (PST) Date: Sat, 28 Dec 2019 00:25:03 +0000 From: Chris Down To: Luigi Semenzato Cc: linux-mm@kvack.org Subject: Re: [PATCH 1/2] Documentation: clarify limitations of hibernation Message-ID: <20191228002503.GB544630@chrisdown.name> References: <20191227213439.139123-1-semenzato@google.com> <20191227213439.139123-2-semenzato@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: <20191227213439.139123-2-semenzato@google.com> X-Bogosity: Ham, tests=bogofilter, spamicity=0.032986, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Oh, and: Luigi Semenzato writes: >+system to be present for the underlying CPU architecture. Additionally, the >+current implementation can enter the hibernation state only when memory >+pressure is low (see "Limitations" below). This doesn't seem to make much sense to me. You claim it only works when pressure is low, but then suggest people raise pressure to fix it. I suppose you mean "only when memory *usage* is low"? I mean, if memory pressure is low, then it's likely to result in these cold pages sitting around in the first place.