linux-kernel - Re: [PATCH v9 6/9] secretmem: add memcg accounting

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Message-ID: <CALvZod5mJnR2DXoYTbp9RX4uR7zVyqAPfD+XKpqXKgxaNyJ1VA@mail.gmail.com>
Date:   Tue, 17 Nov 2020 12:02:01 -0800
From:   Shakeel Butt <shakeelb@...gle.com>
To:     Roman Gushchin <guro@...com>
Cc:     Mike Rapoport <rppt@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Andy Lutomirski <luto@...nel.org>,
        Arnd Bergmann <arnd@...db.de>, Borislav Petkov <bp@...en8.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Christopher Lameter <cl@...ux.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        David Hildenbrand <david@...hat.com>,
        Elena Reshetova <elena.reshetova@...el.com>,
        "H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
        James Bottomley <jejb@...ux.ibm.com>,
        "Kirill A. Shutemov" <kirill@...temov.name>,
        Matthew Wilcox <willy@...radead.org>,
        Mark Rutland <mark.rutland@....com>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Michael Kerrisk <mtk.manpages@...il.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Rick Edgecombe <rick.p.edgecombe@...el.com>,
        Shuah Khan <shuah@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Tycho Andersen <tycho@...ho.ws>, Will Deacon <will@...nel.org>,
        linux-api@...r.kernel.org, linux-arch@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        Linux MM <linux-mm@...ck.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-kselftest@...r.kernel.org, linux-nvdimm@...ts.01.org,
        linux-riscv@...ts.infradead.org, x86@...nel.org
Subject: Re: [PATCH v9 6/9] secretmem: add memcg accounting

On Tue, Nov 17, 2020 at 11:49 AM Roman Gushchin <guro@...com> wrote:
>
> On Tue, Nov 17, 2020 at 06:29:29PM +0200, Mike Rapoport wrote:
> > From: Mike Rapoport <rppt@...ux.ibm.com>
> >
> > Account memory consumed by secretmem to memcg. The accounting is updated
> > when the memory is actually allocated and freed.
> >
> > Signed-off-by: Mike Rapoport <rppt@...ux.ibm.com>
[snip]
> >
> > +static int secretmem_account_pages(struct page *page, gfp_t gfp, int order)
> > +{
> > +     int err;
> > +
> > +     err = memcg_kmem_charge_page(page, gfp, order);

I haven't looked at the whole series but it seems like these pages
will be mapped into the userspace, so this patch has dependency on
Roman's "mm: allow mapping
accounted kernel pages to userspace" patch series.