From: "Tobin C. Harding" <tobin@kernel.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: "Tobin C. Harding" <tobin@kernel.org>,
Roman Gushchin <guro@fb.com>, Christoph Lameter <cl@linux.com>,
Pekka Enberg <penberg@kernel.org>,
David Rientjes <rientjes@google.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Matthew Wilcox <willy@infradead.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: [PATCH v5 0/7] mm: Use slab_list list_head instead of lru
Date: Wed, 3 Apr 2019 10:05:38 +1100 [thread overview]
Message-ID: <20190402230545.2929-1-tobin@kernel.org> (raw)
Hi Andrew,
Here is the updated series that caused the bug found by 0day test
robot. To ease the load on your memory, this series is aimed at
replacing the following:
Original buggy series:
mm-remove-stale-comment-from-page-struct.patch
slub-use-slab_list-instead-of-lru.patch
slab-use-slab_list-instead-of-lru.patch
slob-use-slab_list-instead-of-lru.patch
slub-add-comments-to-endif-pre-processor-macros.patch
slob-respect-list_head-abstraction-layer.patch
list-add-function-list_rotate_to_front.patch
And the bug fix patch:
slob-only-use-list-functions-when-safe-to-do-so.patch
Applies cleanly on top of Linus' tree (tag: v5.1-rc3).
This series differs from the bug fix above by adding a separate return
parameter to slob_page_alloc() instead of using a double pointer. This
is defensive in case later someone adds code that accesses sp (struct
page *), also it is easier to read/verify the code since its less 'tricky'.
Tested by building and booting a kernel using the SLOB allocator and
with CONFIG_DEBUG_LIST.
From v4 ...
Currently the slab allocators (ab)use the struct page 'lru' list_head.
We have a list head for slab allocators to use, 'slab_list'.
During v2 it was noted by Christoph that the SLOB allocator was reaching
into a list_head, this version adds 2 patches to the front of the set to
fix that.
Clean up all three allocators by using the 'slab_list' list_head instead
of overloading the 'lru' list_head.
Changes since v4:
- Add return parameter to slob_page_alloc() to indicate whether the
page is removed from the freelist during allocation.
- Only do list rotate optimisation if the page was _not_ removed from
the freelist (fix bug found by 0day test robot).
Changes since v3:
- Change all ->lru to ->slab_list in slob (thanks Roman).
Changes since v2:
- Add list_rotate_to_front().
- Fix slob to use list_head API.
- Re-order patches to put the list.h changes up front.
- Add acks from Christoph.
Changes since v1:
- Verify object files are the same before and after the patch set is
applied (suggested by Matthew).
- Add extra explanation to the commit logs explaining why these changes
are safe to make (suggested by Roman).
- Remove stale comment (thanks Willy).
thanks,
Tobin.
Tobin C. Harding (7):
list: Add function list_rotate_to_front()
slob: Respect list_head abstraction layer
slob: Use slab_list instead of lru
slub: Add comments to endif pre-processor macros
slub: Use slab_list instead of lru
slab: Use slab_list instead of lru
mm: Remove stale comment from page struct
include/linux/list.h | 18 ++++++++++++
include/linux/mm_types.h | 2 +-
mm/slab.c | 49 ++++++++++++++++----------------
mm/slob.c | 59 +++++++++++++++++++++++++++------------
mm/slub.c | 60 ++++++++++++++++++++--------------------
5 files changed, 115 insertions(+), 73 deletions(-)
--
2.21.0
next reply other threads:[~2019-04-02 23:06 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-02 23:05 Tobin C. Harding [this message]
2019-04-02 23:05 ` [PATCH v5 1/7] list: Add function list_rotate_to_front() Tobin C. Harding
2019-04-03 15:46 ` Christopher Lameter
2019-04-03 17:57 ` Roman Gushchin
2019-04-02 23:05 ` [PATCH v5 2/7] slob: Respect list_head abstraction layer Tobin C. Harding
2019-04-03 15:45 ` Christopher Lameter
2019-04-03 18:00 ` Roman Gushchin
2019-04-03 21:03 ` Tobin C. Harding
2019-04-03 21:23 ` Roman Gushchin
2019-04-03 22:14 ` Tobin C. Harding
2019-04-03 21:13 ` Tobin C. Harding
2019-04-09 12:59 ` Vlastimil Babka
2019-04-09 20:06 ` Tobin C. Harding
2019-04-09 22:25 ` Andrew Morton
2019-04-02 23:05 ` [PATCH v5 3/7] slob: Use slab_list instead of lru Tobin C. Harding
2019-04-03 15:47 ` Christopher Lameter
2019-04-02 23:05 ` [PATCH v5 4/7] slub: Add comments to endif pre-processor macros Tobin C. Harding
2019-04-03 18:42 ` Roman Gushchin
2019-04-02 23:05 ` [PATCH v5 5/7] slub: Use slab_list instead of lru Tobin C. Harding
2019-04-03 18:43 ` Roman Gushchin
2019-04-02 23:05 ` [PATCH v5 6/7] slab: " Tobin C. Harding
2019-04-03 15:48 ` Christopher Lameter
2019-04-03 18:44 ` Roman Gushchin
2019-04-02 23:05 ` [PATCH v5 7/7] mm: Remove stale comment from page struct Tobin C. Harding
2019-04-03 18:45 ` Roman Gushchin
2019-04-09 13:07 ` [PATCH v5 0/7] mm: Use slab_list list_head instead of lru Vlastimil Babka
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