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Mon, 01 Sep 2025 19:10:11 -0700 (PDT) Received: from google.com ([2401:fa00:8f:203:52df:d776:7862:776f]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-24b0d881afasm9754075ad.47.2025.09.01.19.10.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 01 Sep 2025 19:10:10 -0700 (PDT) Date: Tue, 2 Sep 2025 11:10:05 +0900 From: Sergey Senozhatsky To: Vlastimil Babka , Thadeu Lima de Souza Cascardo Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Andrew Morton , Suren Baghdasaryan , Michal Hocko , Brendan Jackman , Johannes Weiner , Zi Yan , kernel-dev@igalia.com, Minchan Kim , Sergey Senozhatsky , Yosry Ahmed , Nhat Pham , Chengming Zhou Subject: Re: [PATCH] mm: show_mem: show number of zspages in show_free_areas Message-ID: References: <20250901183729.3900578-1-cascardo@igalia.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Stat-Signature: mkn56m9z5ftt9yom1yipbxrz7ibs3u7q X-Rspam-User: X-Rspamd-Queue-Id: 61D99180009 X-Rspamd-Server: rspam05 X-HE-Tag: 1756779012-883100 X-HE-Meta: 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 i/LTODy4 m7qVAG3QcCsyhbUMFcU07CvcV7S0o5M02D9bfGM0QkfBr83EEveUeNDxcccCjPSq3hW+M7BPJBZ8/7CTu0vxslNebQwCU+UZt4Ydr1PQobWTavenLbKva6fVbMUTZ0cOvOdITgnlVWvcF9HRN3V+muXdKd7vzJ70tQbPBW/9uVmBfXoH1dXBZFF9ZMe99lDsaAAfTJ9a96txdPlLHvGW911SpfO1Nv6uG8Zq63d95y5Pvz0ofwnhtAVBbF/FXw/dh+aKmkgQd/x+4It+G5X7O04YnnjgsTGoDe5KFY3aCJvEoT9++SL2wbN4d6zODVLvj3xgwxCaFpaE/gZxAHgqOVLlLp9eYmRTi1Y70HzSXI4VkrpqHFTUj4lnJmzPjdGYV3Az6DK/IpWnsrepNgagtF3Jwan/+2I9LloZU0Gg7VCplUB1HQ3F6JTU92dNAFVHjpoAUmai/Mb3MgZ4= 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: List-Subscribe: List-Unsubscribe: On (25/09/01 20:54), Vlastimil Babka wrote: > On 9/1/25 20:37, Thadeu Lima de Souza Cascardo wrote: > > When OOM is triggered, it will show where the pages might be for each zone. > > When using zram, it might look like lots of pages are missing. After this > > patch, zspages are shown as below. > > AFAIK zswap can also use zsmalloc so this would be reported for zswap with > the same effect too, right? Correct. > > [ 48.792859] Node 0 DMA free:2812kB boost:0kB min:60kB low:72kB high:84kB reserved_highatomic:0KB free_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB zspages:11160kB present:15992kB managed:15360kB mlocked:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB > > [ 48.792962] lowmem_reserve[]: 0 956 956 956 956 > > [ 48.792988] Node 0 DMA32 free:3512kB boost:0kB min:3912kB low:4888kB high:5864kB reserved_highatomic:0KB free_highatomic:0KB active_anon:0kB inactive_anon:28kB active_file:8kB inactive_file:16kB unevictable:0kB writepending:0kB zspages:916780kB present:1032064kB managed:978944kB mlocked:0kB bounce:0kB free_pcp:500kB local_pcp:248kB free_cma:0kB > > [ 48.793118] lowmem_reserve[]: 0 0 0 0 0 > > > > Signed-off-by: Thadeu Lima de Souza Cascardo > > Acked-by: Vlastimil Babka Reviewed-by: Sergey Senozhatsky