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From: Shakeel Butt <shakeelb@google.com>
Date: Tue, 17 Nov 2020 12:02:01 -0800
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Subject: Re: [PATCH v9 6/9] secretmem: add memcg accounting
To: Roman Gushchin <guro@fb.com>
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CC: Mike Rapoport <rppt@kernel.org>, Andrew Morton <akpm@linux-foundation.org>, Alexander Viro <viro@zeniv.linux.org.uk>, Andy Lutomirski <luto@kernel.org>, Arnd Bergmann <arnd@arndb.de>, Borislav Petkov <bp@alien8.de>, Catalin Marinas <catalin.marinas@arm.com>, Christopher Lameter <cl@linux.com>, Dave Hansen <dave.hansen@linux.intel.com>, David Hildenbrand <david@redhat.com>, Elena Reshetova <elena.reshetova@intel.com>, "H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@redhat.com>, James Bottomley <jejb@linux.ibm.com>, "Kirill A. Shutemov" <kirill@shutemov.name>, Matthew Wilcox <willy@infradead.org>, Mark Rutland <mark.rutland@arm.com>, Mike Rapoport <rppt@linux.ibm.com>, Michael Kerrisk <mtk.manpages@gmail.com>, Palmer Dabbelt <palmer@dabbelt.com>, Paul Walmsley <paul.walmsley@sifive.com>, Peter Zijlstra <peterz@infradead.org>, Rick Edgecombe <rick.p.edgecombe@intel.com>, Shuah Khan <shuah@kernel.org>, Thomas Gleixner <tglx@linutronix.de>, Tycho Andersen <tycho@tycho.ws>, Will D
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On Tue, Nov 17, 2020 at 11:49 AM Roman Gushchin <guro@fb.com> wrote:
>
> On Tue, Nov 17, 2020 at 06:29:29PM +0200, Mike Rapoport wrote:
> > From: Mike Rapoport <rppt@linux.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@linux.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.
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