Re: [PATCH] mm/memcg: remove useless check on page->mem_cgroup

From: Alex Shi
Date: Wed Aug 05 2020 - 15:58:40 EST




在 2020/8/5 下午8:28, Alex Shi 写道:
> The last patch has a problem on define. this version could fix it.
>
> BTW, I see some !memcg happens when MEMCG compilered but disabled by cgroup_disable
>
>
> [ 94.657666] ---[ end trace f1f34bfc3b32ed2f ]---
> [ 95.138995] anon flags: 0x5005b48008000d(locked|uptodate|dirty|swapbacked)
> [ 95.146220] raw: 005005b48008000d dead000000000100 dead000000000122 ffff8897c7c76ad1
> [ 95.154549] raw: 0000000000000022 0000000000000000 0000000200000000 0000000000000000
> [ 95.162876] page dumped because: VM_WARN_ON_ONCE_PAGE(!memcg)
>
>

The following patch may helpful.