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Mon, 22 Dec 2025 17:41:27 -0800 (PST) Received: from localhost ([194.190.17.114]) by smtp.gmail.com with UTF8SMTPSA id 2adb3069b0e04-59a185d5ea6sm3600776e87.5.2025.12.22.17.41.25 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 22 Dec 2025 17:41:27 -0800 (PST) From: Askar Safin To: gmazyland@gmail.com Cc: Dell.Client.Kernel@dell.com, dm-devel@lists.linux.dev, linux-block@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-crypto@vger.kernel.org, linux-lvm@lists.linux.dev, linux-mm@kvack.org, linux-pm@vger.kernel.org, linux-raid@vger.kernel.org, lvm-devel@lists.linux.dev, mpatocka@redhat.com, pavel@ucw.cz, rafael@kernel.org Subject: Re: [RFC PATCH 2/2] swsusp: make it possible to hibernate to device mapper devices Date: Tue, 23 Dec 2025 04:41:14 +0300 Message-ID: <20251223014114.2193668-1-safinaskar@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <86300955-72e4-42d5-892d-f49bdf14441e@gmail.com> References: <86300955-72e4-42d5-892d-f49bdf14441e@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: A53F6100002 X-Stat-Signature: ms4z6mfa7urzhyrc6wm6t7bqh5e9qrm1 X-HE-Tag: 1766454089-724335 X-HE-Meta: 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 +5KPKS3J 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.011560, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Milan Broz : > Anyway, my understanding is that all device-mapper targets use mempools, > which should ensure that they can process even under memory pressure. Also, I don't understand how mempools help here. As well as I understand, allocation from mempool is still real allocation if mempool's own reserve is over. -- Askar Safin