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[2003:cb:c701:700:2393:b0f4:ef08:bd51]) by smtp.gmail.com with ESMTPSA id o12-20020a05600c2e0c00b003945781b725sm282850wmf.37.2022.05.11.10.13.48 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 11 May 2022 10:13:49 -0700 (PDT) Message-ID: Date: Wed, 11 May 2022 19:13:47 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.8.0 Subject: Re: [PATCH v2 5/6] mm: zswap: add basic meminfo and vmstat coverage To: Johannes Weiner , Andrew Morton Cc: Michal Hocko , Roman Gushchin , Shakeel Butt , Seth Jennings , Dan Streetman , Minchan Kim , linux-mm@kvack.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-team@fb.com References: <20220510152847.230957-1-hannes@cmpxchg.org> <20220510152847.230957-6-hannes@cmpxchg.org> From: David Hildenbrand Organization: Red Hat In-Reply-To: <20220510152847.230957-6-hannes@cmpxchg.org> 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: imf10.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=V+nCXNPD; dmarc=pass (policy=none) header.from=redhat.com; spf=none (imf10.hostedemail.com: domain of david@redhat.com has no SPF policy when checking 170.10.133.124) smtp.mailfrom=david@redhat.com X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: BC151C007C X-Rspam-User: X-Stat-Signature: j45nc1icg9g1w1dbzik7dj4q1i9o3taw X-HE-Tag: 1652289209-711821 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 10.05.22 17:28, Johannes Weiner wrote: > Currently it requires poking at debugfs to figure out the size and > population of the zswap cache on a host. There are no counters for > reads and writes against the cache. As a result, it's difficult to > understand zswap behavior on production systems. > > Print zswap memory consumption and how many pages are zswapped out in > /proc/meminfo. Count zswapouts and zswapins in /proc/vmstat. > > Signed-off-by: Johannes Weiner Acked-by: David Hildenbrand -- Thanks, David / dhildenb