From: Alex Shi <alex.shi@linux.alibaba.com>
To: Yu Zhao <yuzhao@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
Hugh Dickins <hughd@google.com>
Cc: Michal Hocko <mhocko@kernel.org>,
Johannes Weiner <hannes@cmpxchg.org>,
Vladimir Davydov <vdavydov.dev@gmail.com>,
Roman Gushchin <guro@fb.com>, Vlastimil Babka <vbabka@suse.cz>,
Matthew Wilcox <willy@infradead.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 00/11] mm: lru related cleanups
Date: Thu, 10 Dec 2020 17:28:08 +0800 [thread overview]
Message-ID: <54bdbe42-023a-4e32-9b94-173d0ad2dc16@linux.alibaba.com> (raw)
In-Reply-To: <20201207220949.830352-1-yuzhao@google.com>
Hi Yu,
btw, after this patchset, to do cacheline alignment on each of lru lists
are possible, so did you try that to see performance changes?
Thanks
Alex
在 2020/12/8 上午6:09, Yu Zhao 写道:
> The cleanups are intended to reduce the verbosity in lru list
> operations and make them less error-prone. A typical example
> would be how the patches change __activate_page():
>
> static void __activate_page(struct page *page, struct lruvec *lruvec)
> {
> if (!PageActive(page) && !PageUnevictable(page)) {
> - int lru = page_lru_base_type(page);
> int nr_pages = thp_nr_pages(page);
>
> - del_page_from_lru_list(page, lruvec, lru);
> + del_page_from_lru_list(page, lruvec);
> SetPageActive(page);
> - lru += LRU_ACTIVE;
> - add_page_to_lru_list(page, lruvec, lru);
> + add_page_to_lru_list(page, lruvec);
> trace_mm_lru_activate(page);
>
> There are a few more places like __activate_page() and they are
> unnecessarily repetitive in terms of figuring out which list a page
> should be added onto or deleted from. And with the duplicated code
> removed, they are easier to read, IMO.
>
> Patch 1 to 5 basically cover the above. Patch 6 and 7 make code more
> robust by improving bug reporting. Patch 8, 9 and 10 take care of
> some dangling helpers left in header files. Patch 11 isn't strictly a
> clean-up patch, but it seems still relevant to include it here.
>
> Yu Zhao (11):
> mm: use add_page_to_lru_list()
> mm: shuffle lru list addition and deletion functions
> mm: don't pass "enum lru_list" to lru list addition functions
> mm: don't pass "enum lru_list" to trace_mm_lru_insertion()
> mm: don't pass "enum lru_list" to del_page_from_lru_list()
> mm: add __clear_page_lru_flags() to replace page_off_lru()
> mm: VM_BUG_ON lru page flags
> mm: fold page_lru_base_type() into its sole caller
> mm: fold __update_lru_size() into its sole caller
> mm: make lruvec_lru_size() static
> mm: enlarge the "int nr_pages" parameter of update_lru_size()
>
> include/linux/memcontrol.h | 10 +--
> include/linux/mm_inline.h | 115 ++++++++++++++-------------------
> include/linux/mmzone.h | 2 -
> include/linux/vmstat.h | 6 +-
> include/trace/events/pagemap.h | 11 ++--
> mm/compaction.c | 2 +-
> mm/memcontrol.c | 10 +--
> mm/mlock.c | 3 +-
> mm/swap.c | 50 ++++++--------
> mm/vmscan.c | 21 ++----
> 10 files changed, 91 insertions(+), 139 deletions(-)
>
next prev parent reply other threads:[~2020-12-10 9:28 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-07 22:09 [PATCH 00/11] mm: lru related cleanups Yu Zhao
2020-12-07 22:09 ` [PATCH 01/11] mm: use add_page_to_lru_list() Yu Zhao
2020-12-08 3:41 ` Alex Shi
2020-12-07 22:09 ` [PATCH 02/11] mm: shuffle lru list addition and deletion functions Yu Zhao
2020-12-07 22:09 ` [PATCH 03/11] mm: don't pass "enum lru_list" to lru list addition functions Yu Zhao
2020-12-08 8:14 ` Alex Shi
2020-12-08 8:24 ` Alex Shi
2020-12-07 22:09 ` [PATCH 04/11] mm: don't pass "enum lru_list" to trace_mm_lru_insertion() Yu Zhao
2020-12-08 8:46 ` Alex Shi
2020-12-07 22:09 ` [PATCH 05/11] mm: don't pass "enum lru_list" to del_page_from_lru_list() Yu Zhao
2020-12-07 22:09 ` [PATCH 06/11] mm: add __clear_page_lru_flags() to replace page_off_lru() Yu Zhao
2020-12-07 22:09 ` [PATCH 07/11] mm: VM_BUG_ON lru page flags Yu Zhao
2020-12-07 22:24 ` Matthew Wilcox
2020-12-16 0:54 ` Yu Zhao
2020-12-16 0:59 ` Matthew Wilcox
2020-12-07 22:09 ` [PATCH 08/11] mm: fold page_lru_base_type() into its sole caller Yu Zhao
2020-12-08 9:02 ` Alex Shi
2020-12-07 22:09 ` [PATCH 09/11] mm: fold __update_lru_size() " Yu Zhao
2020-12-08 9:07 ` Alex Shi
2020-12-07 22:09 ` [PATCH 10/11] mm: make lruvec_lru_size() static Yu Zhao
2020-12-08 9:09 ` Alex Shi
2020-12-07 22:09 ` [PATCH 11/11] mm: enlarge the "int nr_pages" parameter of update_lru_size() Yu Zhao
2020-12-08 9:15 ` Alex Shi
2020-12-14 21:50 ` Hugh Dickins
2020-12-16 0:18 ` Yu Zhao
2020-12-10 9:28 ` Alex Shi [this message]
2020-12-16 0:48 ` [PATCH 00/11] mm: lru related cleanups Yu Zhao
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