Re: [PATCH] mm: net: memcg accounting for TCP rx zerocopy

[Roman Gushchin]

On Tue, Jan 12, 2021 at 04:18:44PM -0800, Shakeel Butt wrote:
> On Tue, Jan 12, 2021 at 4:12 PM Arjun Roy <arjunroy@xxxxxxxxxx> wrote:
> >
> > On Tue, Jan 12, 2021 at 3:48 PM Roman Gushchin <guro@xxxxxx> wrote:
> > >
> [snip]
> > > Historically we have a corresponding vmstat counter to each charged page.
> > > It helps with finding accounting/stastistics issues: we can check that
> > > memory.current ~= anon + file + sock + slab + percpu + stack.
> > > It would be nice to preserve such ability.
> > >
> >
> > Perhaps one option would be to have it count as a file page, or have a
> > new category.
> >
> 
> Oh these are actually already accounted for in NR_FILE_MAPPED.

Well, it's confusing. Can't we fix this by looking at the new page memcg flag?