From: Andrew Morton <akpm@linux-foundation.org>
To: Yin Fengwei <fengwei.yin@intel.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
stable@vger.kernel.org, willy@infradead.org,
vishal.moola@gmail.com, wangkefeng.wang@huawei.com,
minchan@kernel.org, yuzhao@google.com, david@redhat.com,
ryan.roberts@arm.com, shy828301@gmail.com
Subject: Re: [PATCH 0/2] don't use mapcount() to check large folio sharing
Date: Fri, 28 Jul 2023 10:24:05 -0700 [thread overview]
Message-ID: <20230728102405.7b456eb87fb46042fbce5e4b@linux-foundation.org> (raw)
In-Reply-To: <20230728161356.1784568-1-fengwei.yin@intel.com>
On Sat, 29 Jul 2023 00:13:54 +0800 Yin Fengwei <fengwei.yin@intel.com> wrote:
> In madvise_cold_or_pageout_pte_range() and madvise_free_pte_range(),
> folio_mapcount() is used to check whether the folio is shared. But it's
> not correct as folio_mapcount() returns total mapcount of large folio.
>
> Use folio_estimated_sharers() here as the estimated number is enough.
What are the user-visible runtime effects of these changes?
(and please try to avoid using the same Subject: for different patches)
next prev parent reply other threads:[~2023-07-28 17:24 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-28 16:13 Yin Fengwei
2023-07-28 16:13 ` [PATCH 1/2] madvise: don't use mapcount() against large folio for sharing check Yin Fengwei
2023-07-28 16:13 ` [PATCH 2/2] " Yin Fengwei
2023-07-28 17:41 ` Andrew Morton
2023-07-29 13:53 ` Yin, Fengwei
2023-07-28 17:24 ` Andrew Morton [this message]
2023-08-02 12:39 ` [PATCH 0/2] don't use mapcount() to check large folio sharing Yin, Fengwei
2023-08-04 7:14 ` Yin, Fengwei
2023-08-07 16:43 ` Andrew Morton
2023-08-08 0:02 ` Yin, Fengwei
2023-08-02 10:27 ` Ryan Roberts
2023-08-02 10:48 ` David Hildenbrand
2023-08-02 11:20 ` Ryan Roberts
2023-08-02 11:36 ` David Hildenbrand
2023-08-02 11:51 ` Ryan Roberts
2023-08-02 11:52 ` David Hildenbrand
2023-08-02 12:35 ` Yin, Fengwei
2023-08-02 12:40 ` Ryan Roberts
2023-08-02 12:42 ` Yin, Fengwei
2023-08-02 12:49 ` Ryan Roberts
2023-08-02 12:55 ` Yin, Fengwei
2023-08-03 20:46 ` Yu Zhao
2023-08-03 23:27 ` Yin, Fengwei
2023-08-03 23:38 ` Yu Zhao
2023-08-04 0:17 ` Yin, Fengwei
2023-08-04 7:31 ` David Hildenbrand
2023-08-04 7:36 ` Yin, Fengwei
2023-08-04 8:11 ` Yin, Fengwei
2023-08-02 12:43 ` David Hildenbrand
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