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

[Alex Shi]

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.