From: Vlastimil Babka <vbabka@suse.cz>
To: Arun KS <arunks@codeaurora.org>,
akpm@linux-foundation.org, keescook@chromium.org,
khlebnikov@yandex-team.ru, minchan@kernel.org, mhocko@kernel.org,
osalvador@suse.de, linux-kernel@vger.kernel.org,
linux-mm@kvack.org
Cc: getarunks@gmail.com
Subject: Re: [PATCH v2 2/4] mm: Convert zone->managed_pages to atomic variable
Date: Wed, 7 Nov 2018 09:57:51 +0100 [thread overview]
Message-ID: <9379a2c2-d791-2f2a-9019-2ff091dac5db@suse.cz> (raw)
In-Reply-To: <1541521310-28739-3-git-send-email-arunks@codeaurora.org>
On 11/6/18 5:21 PM, Arun KS wrote:
> totalram_pages, zone->managed_pages and totalhigh_pages updates
> are protected by managed_page_count_lock, but readers never care
> about it. Convert these variables to atomic to avoid readers
> potentially seeing a store tear.
>
> This patch converts zone->managed_pages. Subsequent patches will
> convert totalram_panges, totalhigh_pages and eventually
> managed_page_count_lock will be removed.
>
> Suggested-by: Michal Hocko <mhocko@suse.com>
> Suggested-by: Vlastimil Babka <vbabka@suse.cz>
> Signed-off-by: Arun KS <arunks@codeaurora.org>
> Reviewed-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
> Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
next prev parent reply other threads:[~2018-11-07 8:57 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-06 16:21 [PATCH v2 0/4] mm: convert totalram_pages, totalhigh_pages and managed pages to atomic Arun KS
2018-11-06 16:21 ` [PATCH v2 1/4] mm: Fix multiple evaluvations of totalram_pages and managed_pages Arun KS
2018-11-07 8:20 ` Michal Hocko
2018-11-07 8:44 ` Vlastimil Babka
2018-11-07 9:23 ` Michal Hocko
2018-11-07 19:54 ` kbuild test robot
2018-11-07 20:07 ` kbuild test robot
2018-11-06 16:21 ` [PATCH v2 2/4] mm: Convert zone->managed_pages to atomic variable Arun KS
2018-11-07 8:57 ` Vlastimil Babka [this message]
2018-11-06 16:21 ` [PATCH v2 3/4] mm: convert totalram_pages and totalhigh_pages variables to atomic Arun KS
2018-11-07 9:04 ` Vlastimil Babka
2018-11-08 7:23 ` Arun KS
2018-11-07 20:07 ` kbuild test robot
2018-11-07 20:24 ` kbuild test robot
2018-11-06 16:21 ` [PATCH v2 4/4] mm: Remove managed_page_count spinlock Arun KS
2018-11-07 21:26 ` kbuild test robot
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