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
next 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
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