kernel.git/arch/x86/include/asm/pgtable-2level.h, branch linux-4.13.y

mm, x86: add support for PUD-sized transparent hugepages

2017-02-25T01:46:54Z

The current transparent hugepage code only supports PMDs. This patch adds support for transparent use of PUDs with DAX. It does not include support for anonymous pages. x86 support code also added. Most of this patch simply parallels the work that was done for huge PMDs. The only major difference is how the new ->pud_entry method in mm_walk works. The ->pmd_entry method replaces the ->pte_entry method, whereas the ->pud_entry method works along with either ->pmd_entry or ->pte_entry. The pagewalk code takes care of locking the PUD before calling ->pud_walk, so handlers do not need to worry whether the PUD is stable. [dave.jiang@intel.com: fix SMP x86 32bit build for native_pud_clear()] Link: http://lkml.kernel.org/r/148719066814.31111.3239231168815337012.stgit@djiang5-desk3.ch.intel.com [dave.jiang@intel.com: native_pud_clear missing on i386 build] Link: http://lkml.kernel.org/r/148640375195.69754.3315433724330910314.stgit@djiang5-desk3.ch.intel.com Link: http://lkml.kernel.org/r/148545059381.17912.8602162635537598445.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Matthew Wilcox Signed-off-by: Dave Jiang Tested-by: Alexander Kapshuk Cc: Dave Hansen Cc: Vlastimil Babka Cc: Jan Kara Cc: Dan Williams Cc: Ross Zwisler Cc: Kirill A. Shutemov Cc: Nilesh Choudhury Cc: Ingo Molnar Cc: "H. Peter Anvin" Cc: Thomas Gleixner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

x86: drop _PAGE_FILE and pte_file()-related helpers

2015-02-10T22:30:33Z

We've replaced remap_file_pages(2) implementation with emulation. Nobody creates non-linear mapping anymore. Signed-off-by: Kirill A. Shutemov Cc: Thomas Gleixner Cc: Ingo Molnar Cc: "H. Peter Anvin" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm: x86 pgtable: require X86_64 for soft-dirty tracker

2014-06-04T23:54:05Z

Tracking dirty status on 2 level pages requires very ugly macros and taking into account how old the machines who can operate without PAE mode only are, lets drop soft dirty tracker from them for code simplicity (note I can't drop all the macros from 2 level pages by now since _PAGE_BIT_PROTNONE and _PAGE_BIT_FILE are still used even without tracker). Linus proposed to completely rip off softdirty support on x86-32 (even with PAE) and since for CRIU we're not planning to support native x86-32 mode, lets do that. (Softdirty tracker is relatively new feature which is mostly used by CRIU so I don't expect if such API change would cause problems for userspace). Signed-off-by: Cyrill Gorcunov Cc: Linus Torvalds Cc: Mel Gorman Cc: Peter Anvin Cc: Ingo Molnar Cc: Steven Noonan Cc: Rik van Riel Cc: David Vrabel Cc: Peter Zijlstra Cc: Pavel Emelyanov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm: x86 pgtable: drop unneeded preprocessor ifdef

2014-06-04T23:54:05Z

_PAGE_BIT_FILE (bit 6) is always less than _PAGE_BIT_PROTNONE (bit 8), so drop redundant #ifdef. Signed-off-by: Cyrill Gorcunov Cc: Linus Torvalds Cc: Mel Gorman Cc: Peter Anvin Cc: Ingo Molnar Cc: Steven Noonan Cc: Rik van Riel Cc: David Vrabel Cc: Peter Zijlstra Cc: Pavel Emelyanov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

x86/mm: Unify pte_to_pgoff() and pgoff_to_pte() helpers

2013-11-19T13:24:34Z

Use unified pte_bitop() helper to manipulate bits in pte/pgoff bitfields and convert pte_to_pgoff()/pgoff_to_pte() to inlines. Signed-off-by: Cyrill Gorcunov Signed-off-by: Andrew Morton Cc: Pavel Emelyanov Cc: Andy Lutomirski Cc: "H. Peter Anvin" Cc: Linus Torvalds Cc: Andrew Morton Cc: Peter Zijlstra Signed-off-by: Ingo Molnar

mm: save soft-dirty bits on file pages

2013-08-14T00:57:48Z

Andy reported that if file page get reclaimed we lose the soft-dirty bit if it was there, so save _PAGE_BIT_SOFT_DIRTY bit when page address get encoded into pte entry. Thus when #pf happens on such non-present pte we can restore it back. Reported-by: Andy Lutomirski Signed-off-by: Cyrill Gorcunov Acked-by: Pavel Emelyanov Cc: Matt Mackall Cc: Xiao Guangrong Cc: Marcelo Tosatti Cc: KOSAKI Motohiro Cc: Stephen Rothwell Cc: Peter Zijlstra Cc: "Aneesh Kumar K.V" Cc: Minchan Kim Cc: Wanpeng Li Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

x86/debug: Add KERN_ to bare printks, convert printks to pr_

2012-06-06T07:17:22Z

Use a more current logging style: - Bare printks should have a KERN_ for consistency's sake - Add pr_fmt where appropriate - Neaten some macro definitions - Convert some Ok output to OK - Use "%s: ", __func__ in pr_fmt for summit - Convert some printks to pr_ Message output is not identical in all cases. Signed-off-by: Joe Perches Cc: levinsasha928@gmail.com Link: http://lkml.kernel.org/r/1337655007.24226.10.camel@joe2Laptop [ merged two similar patches, tidied up the changelog ] Signed-off-by: Ingo Molnar

thp: add x86 32bit support

2011-01-14T01:32:44Z

Add support for transparent hugepages to x86 32bit. Share the same VM_ bitflag for VM_MAPPED_COPY. mm/nommu.c will never support transparent hugepages. Signed-off-by: Johannes Weiner Signed-off-by: Andrea Arcangeli Reviewed-by: Rik van Riel Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

x86: with the last user gone, remove set_pte_present

2009-03-19T13:04:19Z

Impact: cleanup set_pte_present() is no longer used, directly or indirectly, so remove it. Signed-off-by: Jeremy Fitzhardinge Cc: Xen-devel Cc: Jeremy Fitzhardinge Cc: Alok Kataria Cc: Marcelo Tosatti Cc: Avi Kivity LKML-Reference: <1237406613-2929-2-git-send-email-jeremy@goop.org> Signed-off-by: Ingo Molnar

x86: unify pte_none

2009-02-06T20:26:08Z

Impact: cleanup Unify and demacro pte_none. Signed-off-by: Jeremy Fitzhardinge