Re: [PATCH v2] mm: show_mem: show number of zspages in show_free_areas

[Zi Yan]

On 2 Sep 2025, at 8:49, Thadeu Lima de Souza Cascardo wrote:

> When OOM is triggered, it will show where the pages might be for each zone.
> When using zram or zswap, it might look like lots of pages are missing.
> After this patch, zspages are shown as below.
>
> [   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@xxxxxxxxxx>
> ---
> v2:
> - fix build when CONFIG_ZSMALLOC is not enabled
> ---
>  mm/show_mem.c | 6 ++++++
>  1 file changed, 6 insertions(+)
>

Acked-by: Zi Yan <ziy@xxxxxxxxxx>

Best Regards,
Yan, Zi