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Date: Wed, 13 Jan 2021 10:43:02 -0800 From: Roman Gushchin <guro@...com> To: Shakeel Butt <shakeelb@...gle.com> CC: Arjun Roy <arjunroy@...gle.com>, Johannes Weiner <hannes@...xchg.org>, Michal Hocko <mhocko@...nel.org>, Eric Dumazet <edumazet@...gle.com>, Andrew Morton <akpm@...ux-foundation.org>, "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, Linux MM <linux-mm@...ck.org>, Cgroups <cgroups@...r.kernel.org>, netdev <netdev@...r.kernel.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: [PATCH] mm: net: memcg accounting for TCP rx zerocopy 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@...gle.com> wrote: > > > > On Tue, Jan 12, 2021 at 3:48 PM Roman Gushchin <guro@...com> 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?
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