linux-kernel - [PATCH v3 0/2] secretmem: optimize page_is

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Message-Id: <20210420150049.14031-1-rppt@kernel.org>
Date:   Tue, 20 Apr 2021 18:00:47 +0300
From:   Mike Rapoport <rppt@...nel.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     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>,
        Matthew Garrett <mjg59@...f.ucam.org>,
        Mark Rutland <mark.rutland@....com>,
        Michal Hocko <mhocko@...e.com>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Mike Rapoport <rppt@...nel.org>,
        Michael Kerrisk <mtk.manpages@...il.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Peter Zijlstra <peterz@...radead.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Rick Edgecombe <rick.p.edgecombe@...el.com>,
        Roman Gushchin <guro@...com>,
        Shakeel Butt <shakeelb@...gle.com>,
        Shuah Khan <shuah@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Tycho Andersen <tycho@...ho.ws>, Will Deacon <will@...nel.org>,
        Yury Norov <yury.norov@...il.com>, linux-api@...r.kernel.org,
        linux-arch@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        linux-nvdimm@...ts.01.org, linux-riscv@...ts.infradead.org,
        x86@...nel.org
Subject: [PATCH v3 0/2]  secretmem: optimize page_is_secretmem()

From: Mike Rapoport <rppt@...ux.ibm.com>

Hi,

This is an updated version of page_is_secretmem() changes.
This is based on v5.12-rc7-mmots-2021-04-15-16-28.

@Andrew, please let me know if you'd like me to rebase it differently or
resend the entire set.

v3:
* add missing put_compound_head() if we are to return NULL from
  gup_page_range(), thanks David.
* add unlikely() to test for page_is_secretmem.

v2:
* move the check for secretmem page in gup_pte_range after we get a
  reference to the page, per Matthew.

Mike Rapoport (2):
  secretmem/gup: don't check if page is secretmem without reference
  secretmem: optimize page_is_secretmem()

 include/linux/secretmem.h | 26 +++++++++++++++++++++++++-
 mm/gup.c                  |  6 +++---
 mm/secretmem.c            | 12 +-----------
 3 files changed, 29 insertions(+), 15 deletions(-)

-- 
2.28.0


Mike Rapoport (2):
  secretmem/gup: don't check if page is secretmem without reference
  secretmem: optimize page_is_secretmem()

 include/linux/secretmem.h | 26 +++++++++++++++++++++++++-
 mm/gup.c                  |  8 +++++---
 mm/secretmem.c            | 12 +-----------
 3 files changed, 31 insertions(+), 15 deletions(-)

-- 
2.28.0