All of lore.kernel.org
 help / color / mirror / Atom feed
From: steve.capper@linaro.org (Steve Capper)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC PATCH 0/6] Huge pages for short descriptors on ARM
Date: Fri, 13 Dec 2013 19:05:40 +0000	[thread overview]
Message-ID: <1386961546-10061-1-git-send-email-steve.capper@linaro.org> (raw)

Hello,
This RFC is another attempt at bringing HugeTLB pages and Transparent
Huge Pages (THP) to ARM on short descriptors.

Since my last resend in October I have rebased the code and simplified
it quite a lot. Rather than translate pte representations from software
bits to hardware bits and from hardware bits to software bits, I use
huge_pte_... analogues of the pte functions to deal with huge pages
directly.

There is one small bit of translation that takes place to populate an
appropriate pgprot_t value for the VMA containing the huge page. Once
we have that pgprot_t, we can manipulate huge ptes/pmds as normal with
the bit and modify funcs.

I have tested this series on an Arndale board running 3.13-rc3 with the
cache flushing fixes mentioned at:
http://lists.infradead.org/pipermail/linux-arm-kernel/2013-December/219081.html

The libhugetlbfs checks, LTP and some custom THP PROT_NONE tests were
used to test this series.

To go forward with this series I would really like to know if anyone is
interested in huge pages for short-descriptors on ARM, and whether or
not these patches work well for those people?

As always, I would also appreciate any comments, critique or flames :-).

Cheers,
--
Steve

Steve Capper (6):
  mm: hugetlb: Introduce huge_pte_page and huge_pte_present
  arm: mm: Adjust the parameters for __sync_icache_dcache
  arm: mm: Make mmu_gather aware of huge pages
  arm: mm: Compute pgprot values for huge page sections
  arm: mm: HugeTLB support for non-LPAE systems
  arm: mm: Add Transparent HugePage support for non-LPAE

 arch/arm/Kconfig                      |   4 +-
 arch/arm/include/asm/hugetlb-2level.h | 121 ++++++++++++++++++++++++++++++
 arch/arm/include/asm/hugetlb-3level.h |   6 ++
 arch/arm/include/asm/hugetlb.h        |  10 +--
 arch/arm/include/asm/pgtable-2level.h | 137 ++++++++++++++++++++++++++++++++--
 arch/arm/include/asm/pgtable-3level.h |   6 ++
 arch/arm/include/asm/pgtable.h        |   9 +--
 arch/arm/include/asm/tlb.h            |  10 ++-
 arch/arm/kernel/head.S                |  10 ++-
 arch/arm/mm/fault.c                   |  13 ----
 arch/arm/mm/flush.c                   |   9 +--
 arch/arm/mm/fsr-2level.c              |   4 +-
 arch/arm/mm/hugetlbpage.c             |   2 +-
 arch/arm/mm/mmu.c                     |  52 +++++++++++++
 include/linux/hugetlb.h               |   8 ++
 mm/hugetlb.c                          |  18 ++---
 16 files changed, 368 insertions(+), 51 deletions(-)
 create mode 100644 arch/arm/include/asm/hugetlb-2level.h

-- 
1.8.1.4

             reply	other threads:[~2013-12-13 19:05 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-12-13 19:05 Steve Capper [this message]
2013-12-13 19:05 ` [RFC PATCH 1/6] mm: hugetlb: Introduce huge_pte_page and huge_pte_present Steve Capper
2013-12-13 19:05 ` [RFC PATCH 2/6] arm: mm: Adjust the parameters for __sync_icache_dcache Steve Capper
2013-12-13 19:05 ` [RFC PATCH 3/6] arm: mm: Make mmu_gather aware of huge pages Steve Capper
2013-12-13 19:05 ` [RFC PATCH 4/6] arm: mm: Compute pgprot values for huge page sections Steve Capper
2013-12-13 19:05 ` [RFC PATCH 5/6] arm: mm: HugeTLB support for non-LPAE systems Steve Capper
2013-12-13 19:05 ` [RFC PATCH 6/6] arm: mm: Add Transparent HugePage support for non-LPAE Steve Capper

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1386961546-10061-1-git-send-email-steve.capper@linaro.org \
    --to=steve.capper@linaro.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.