Re: [PATCH] memcg: remove unused mem_cgroup_from_obj()

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On Sun, May 28, 2023 at 08:36:43PM +0100, Matthew Wilcox wrote:
> On Sun, May 28, 2023 at 09:01:37PM +0800, Muchun Song wrote:
> > with *init_net*. If Vasily does not want to bring commit 1d0403d20f6c back,
> > this patch LGTM. Otherwise, let's wait for Vasily.
> 
> If we're not going to bring back 1d0403d20f6c then we should
> simply revert fc4db90fe71e instead of applying this patch.

Initially I was thinking of adding virt_addr_valid() check in the
mem_cgroup_from_obj() but it seems like that check is not cheap on
arm64. I don't have any quick solutions other than adding a check
against init_net in __register_pernet_operations(). I will wait for
couple of days for Vasily otherwise I will retry 1d0403d20f6c with the
init_net check in __register_pernet_operations().




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