All of lore.kernel.org
 help / color / mirror / Atom feed
From: Matthew Wilcox <willy@infradead.org>
To: linux-mm@kvack.org
Cc: "Matthew Wilcox" <mawilcox@microsoft.com>,
	"Andrew Morton" <akpm@linux-foundation.org>,
	"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
	"Christoph Lameter" <cl@linux.com>,
	"Lai Jiangshan" <jiangshanlai@gmail.com>,
	"Pekka Enberg" <penberg@kernel.org>,
	"Vlastimil Babka" <vbabka@suse.cz>,
	"Dave Hansen" <dave.hansen@linux.intel.com>,
	"Jérôme Glisse" <jglisse@redhat.com>
Subject: [PATCH v5 00/17] Rearrange struct page
Date: Fri,  4 May 2018 11:33:01 -0700	[thread overview]
Message-ID: <20180504183318.14415-1-willy@infradead.org> (raw)

From: Matthew Wilcox <mawilcox@microsoft.com>

As presented at LSFMM, this patch-set rearranges struct page to give
more contiguous usable space to users who have allocated a struct page
for their own purposes.  For a graphical view of before-and-after, see
the first two tabs of https://docs.google.com/spreadsheets/d/1tvCszs_7FXrjei9_mtFiKV6nW1FLnYyvPvW-qNZhdog/edit?usp=sharing

Highlights:
 - slub's counters no longer share space with _refcount.
 - slub's freelist+counters are now naturally dword aligned.
 - It's now more obvious what fields in struct page are used by which
   owners (some owners still take advantage of the union aliasing).
 - deferred_list now really exists in struct page instead of just a
   comment.
 - slub loses a parameter to a lot of functions.
 - Several hidden uses of struct page are now documented in code.

Changes in v5:
 - Added acks from Christoph Lameter
 - Dropped patch to make slub use page->private instead of page->counters.
 - Combined slab/slob/slub into one union in struct page.
 - Added patch to distinguish VMalloc pages.
 - Added patch to remove slub's 'reserved' file in sysfs.
 - Call the unions 'main union' and 'mapcount union' instead of 'first
   union' and 'second union'.
 - Removed a line which described which double-word slub's freelist was in.

Changes in v4:
 - Added acks/reviews from Kirill & Randy
 - Removed call to page_mapcount_reset from slub since it no longer uses
   mapcount union.
 - Add pt_mm and hmm_data to struct page

Matthew Wilcox (17):
  s390: Use _refcount for pgtables
  mm: Split page_type out from _mapcount
  mm: Mark pages in use for page tables
  mm: Switch s_mem and slab_cache in struct page
  mm: Move 'private' union within struct page
  mm: Move _refcount out of struct page union
  mm: Combine first three unions in struct page
  mm: Use page->deferred_list
  mm: Move lru union within struct page
  mm: Combine LRU and main union in struct page
  mm: Improve struct page documentation
  mm: Add pt_mm to struct page
  mm: Add hmm_data to struct page
  slab,slub: Remove rcu_head size checks
  slub: Remove kmem_cache->reserved
  slub: Remove 'reserved' file from sysfs
  mm: Distinguish VMalloc pages

 arch/s390/mm/pgalloc.c                 |  21 ++-
 arch/x86/mm/pgtable.c                  |   5 +-
 fs/proc/page.c                         |   4 +
 include/linux/hmm.h                    |   8 +-
 include/linux/mm.h                     |   2 +
 include/linux/mm_types.h               | 238 ++++++++++++-------------
 include/linux/page-flags.h             |  76 ++++++--
 include/linux/slub_def.h               |   1 -
 include/uapi/linux/kernel-page-flags.h |   3 +-
 kernel/crash_core.c                    |   1 +
 mm/huge_memory.c                       |   7 +-
 mm/page_alloc.c                        |  17 +-
 mm/slab.c                              |   2 -
 mm/slub.c                              | 102 +++--------
 mm/vmalloc.c                           |   5 +-
 scripts/tags.sh                        |   6 +-
 tools/vm/page-types.c                  |   2 +
 17 files changed, 244 insertions(+), 256 deletions(-)

-- 
2.17.0

             reply	other threads:[~2018-05-04 18:33 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-04 18:33 Matthew Wilcox [this message]
2018-05-04 18:33 ` [PATCH v5 01/17] s390: Use _refcount for pgtables Matthew Wilcox
2018-05-04 18:33 ` [PATCH v5 02/17] mm: Split page_type out from _mapcount Matthew Wilcox
2018-05-14 14:33   ` Vlastimil Babka
2018-05-04 18:33 ` [PATCH v5 03/17] mm: Mark pages in use for page tables Matthew Wilcox
2018-05-04 18:33 ` [PATCH v5 04/17] mm: Switch s_mem and slab_cache in struct page Matthew Wilcox
2018-05-07 14:58   ` Christopher Lameter
2018-05-14 14:37   ` Vlastimil Babka
2018-05-04 18:33 ` [PATCH v5 05/17] mm: Move 'private' union within " Matthew Wilcox
2018-05-04 18:33 ` [PATCH v5 06/17] mm: Move _refcount out of struct page union Matthew Wilcox
2018-05-04 18:33 ` [PATCH v5 07/17] mm: Combine first three unions in struct page Matthew Wilcox
2018-05-14 14:42   ` Vlastimil Babka
2018-05-04 18:33 ` [PATCH v5 08/17] mm: Use page->deferred_list Matthew Wilcox
2018-05-04 18:33 ` [PATCH v5 09/17] mm: Move lru union within struct page Matthew Wilcox
2018-05-04 18:33 ` [PATCH v5 10/17] mm: Combine LRU and main union in " Matthew Wilcox
2018-05-04 18:33 ` [PATCH v5 11/17] mm: Improve struct page documentation Matthew Wilcox
2018-05-15  9:22   ` Vlastimil Babka
2018-05-04 18:33 ` [PATCH v5 12/17] mm: Add pt_mm to struct page Matthew Wilcox
2018-05-15  9:27   ` Vlastimil Babka
2018-05-15 12:23     ` Matthew Wilcox
2018-05-04 18:33 ` [PATCH v5 13/17] mm: Add hmm_data " Matthew Wilcox
2018-05-15  9:32   ` Vlastimil Babka
2018-05-15 12:40     ` Vlastimil Babka
2018-05-04 18:33 ` [PATCH v5 14/17] slab,slub: Remove rcu_head size checks Matthew Wilcox
2018-05-15 11:30   ` Vlastimil Babka
2018-05-04 18:33 ` [PATCH v5 15/17] slub: Remove kmem_cache->reserved Matthew Wilcox
2018-05-04 18:33 ` [PATCH v5 16/17] slub: Remove 'reserved' file from sysfs Matthew Wilcox
2018-05-07 15:01   ` Christopher Lameter
2018-05-04 18:33 ` [PATCH v5 17/17] mm: Distinguish VMalloc pages Matthew Wilcox
2018-05-04 20:52 ` [PATCH v5 00/17] Rearrange struct page Andrew Morton
2018-05-04 21:25   ` Matthew Wilcox

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=20180504183318.14415-1-willy@infradead.org \
    --to=willy@infradead.org \
    --cc=akpm@linux-foundation.org \
    --cc=cl@linux.com \
    --cc=dave.hansen@linux.intel.com \
    --cc=jglisse@redhat.com \
    --cc=jiangshanlai@gmail.com \
    --cc=kirill.shutemov@linux.intel.com \
    --cc=linux-mm@kvack.org \
    --cc=mawilcox@microsoft.com \
    --cc=penberg@kernel.org \
    --cc=vbabka@suse.cz \
    --subject='Re: [PATCH v5 00/17] Rearrange struct page' \
    /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

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.