linux-kernel - Re: [PATCH] mm: show_mem: show number of zspages in show_free

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <ypp4byiagmgmdaaq3wskjxwxvub7pxhhqlvwsrhsyqlapqp5v2@rbfidxth3z6z>
Date: Tue, 2 Sep 2025 11:10:05 +0900
From: Sergey Senozhatsky <senozhatsky@...omium.org>
To: Vlastimil Babka <vbabka@...e.cz>, 
	Thadeu Lima de Souza Cascardo <cascardo@...lia.com>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org, 
	Andrew Morton <akpm@...ux-foundation.org>, Suren Baghdasaryan <surenb@...gle.com>, 
	Michal Hocko <mhocko@...e.com>, Brendan Jackman <jackmanb@...gle.com>, 
	Johannes Weiner <hannes@...xchg.org>, Zi Yan <ziy@...dia.com>, kernel-dev@...lia.com, 
	Minchan Kim <minchan@...nel.org>, Sergey Senozhatsky <senozhatsky@...omium.org>, 
	Yosry Ahmed <yosry.ahmed@...ux.dev>, Nhat Pham <nphamcs@...il.com>, 
	Chengming Zhou <chengming.zhou@...ux.dev>
Subject: Re: [PATCH] mm: show_mem: show number of zspages in show_free_areas

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 <cascardo@...lia.com>
> 
> Acked-by: Vlastimil Babka <vbabka@...e.cz>

Reviewed-by: Sergey Senozhatsky <senozhatsky@...omium.org>