From: Pavel Machek <pavel@ucw.cz>
To: Minchan Kim <minchan@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Michael Kerrisk <mtk.manpages@gmail.com>,
linux-api@vger.kernel.org, Hugh Dickins <hughd@google.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Rik van Riel <riel@redhat.com>, Mel Gorman <mgorman@suse.de>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Jason Evans <je@fb.com>, Daniel Micay <danielmicay@gmail.com>,
"Kirill A. Shutemov" <kirill@shutemov.name>,
Shaohua Li <shli@kernel.org>, Michal Hocko <mhocko@suse.cz>,
yalin.wang2010@gmail.com
Subject: Re: [PATCH v2 00/13] MADV_FREE support
Date: Sat, 5 Dec 2015 12:10:42 +0100 [thread overview]
Message-ID: <20151205111042.GA11598@amd> (raw)
In-Reply-To: <1446600367-7976-1-git-send-email-minchan@kernel.org>
On Wed 2015-11-04 10:25:54, Minchan Kim wrote:
> MADV_FREE is on linux-next so long time. The reason was two, I think.
>
> 1. MADV_FREE code on reclaim path was really mess.
Could you explain what MADV_FREE does?
Comment in code says 'free the page only when there's memory
pressure'. So I mark my caches MADV_FREE, no memory pressure, I can
keep using it? And if there's memory pressure, what happens? I get
zeros? SIGSEGV?
Thanks,
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
WARNING: multiple messages have this Message-ID (diff)
From: Pavel Machek <pavel@ucw.cz>
To: Minchan Kim <minchan@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Michael Kerrisk <mtk.manpages@gmail.com>,
linux-api@vger.kernel.org, Hugh Dickins <hughd@google.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Rik van Riel <riel@redhat.com>, Mel Gorman <mgorman@suse.de>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Jason Evans <je@fb.com>, Daniel Micay <danielmicay@gmail.com>,
"Kirill A. Shutemov" <kirill@shutemov.name>,
Shaohua Li <shli@kernel.org>, Michal Hocko <mhocko@suse.cz>,
yalin.wang2010@gmail.com
Subject: Re: [PATCH v2 00/13] MADV_FREE support
Date: Sat, 5 Dec 2015 12:10:42 +0100 [thread overview]
Message-ID: <20151205111042.GA11598@amd> (raw)
In-Reply-To: <1446600367-7976-1-git-send-email-minchan@kernel.org>
On Wed 2015-11-04 10:25:54, Minchan Kim wrote:
> MADV_FREE is on linux-next so long time. The reason was two, I think.
>
> 1. MADV_FREE code on reclaim path was really mess.
Could you explain what MADV_FREE does?
Comment in code says 'free the page only when there's memory
pressure'. So I mark my caches MADV_FREE, no memory pressure, I can
keep using it? And if there's memory pressure, what happens? I get
zeros? SIGSEGV?
Thanks,
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
--
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next prev parent reply other threads:[~2015-12-05 11:10 UTC|newest]
Thread overview: 96+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-04 1:25 [PATCH v2 00/13] MADV_FREE support Minchan Kim
2015-11-04 1:25 ` Minchan Kim
2015-11-04 1:25 ` [PATCH v2 01/13] mm: support madvise(MADV_FREE) Minchan Kim
2015-11-04 1:25 ` Minchan Kim
2015-11-04 2:16 ` Sergey Senozhatsky
2015-11-04 2:16 ` Sergey Senozhatsky
2015-11-04 2:16 ` Sergey Senozhatsky
2015-11-04 23:39 ` Minchan Kim
2015-11-04 23:39 ` Minchan Kim
2015-11-04 23:39 ` Minchan Kim
2015-11-05 3:41 ` Sergey Senozhatsky
2015-11-05 3:41 ` Sergey Senozhatsky
2015-11-05 3:41 ` Sergey Senozhatsky
2015-11-04 2:29 ` Sergey Senozhatsky
2015-11-04 2:29 ` Sergey Senozhatsky
2015-11-04 23:40 ` Minchan Kim
2015-11-04 23:40 ` Minchan Kim
2015-11-04 23:40 ` Minchan Kim
2015-11-04 3:41 ` Andy Lutomirski
2015-11-04 3:41 ` Andy Lutomirski
2015-11-04 3:41 ` Andy Lutomirski
2015-11-04 5:50 ` Daniel Micay
2015-11-04 5:53 ` Daniel Micay
2015-11-04 5:53 ` Daniel Micay
2015-11-04 6:04 ` Daniel Micay
2015-11-04 18:23 ` Andy Lutomirski
2015-11-04 18:23 ` Andy Lutomirski
2015-11-04 22:05 ` Daniel Micay
2015-11-05 18:17 ` Shaohua Li
2015-11-05 18:17 ` Shaohua Li
2015-11-05 18:17 ` Shaohua Li
2015-11-05 20:13 ` Daniel Micay
2015-11-05 20:14 ` Daniel Micay
2015-11-05 20:14 ` Daniel Micay
2015-11-05 0:13 ` Minchan Kim
2015-11-05 0:13 ` Minchan Kim
2015-11-05 0:13 ` Minchan Kim
2015-11-05 0:42 ` Andy Lutomirski
2015-11-05 0:42 ` Andy Lutomirski
2015-11-05 0:56 ` Minchan Kim
2015-11-05 0:56 ` Minchan Kim
2015-11-05 1:29 ` Andy Lutomirski
2015-11-05 1:29 ` Andy Lutomirski
2015-11-05 1:48 ` Minchan Kim
2015-11-05 1:48 ` Minchan Kim
2015-11-05 1:48 ` Minchan Kim
2015-11-04 20:00 ` Shaohua Li
2015-11-04 20:00 ` Shaohua Li
2015-11-04 20:00 ` Shaohua Li
2015-11-04 21:16 ` Daniel Micay
2015-11-04 21:16 ` Daniel Micay
2015-11-04 21:29 ` Daniel Micay
2015-11-04 21:29 ` Daniel Micay
2015-11-04 21:43 ` Andy Lutomirski
2015-11-04 21:43 ` Andy Lutomirski
2015-11-05 1:33 ` Minchan Kim
2015-11-05 1:33 ` Minchan Kim
2015-11-05 1:33 ` Minchan Kim
2015-11-05 1:37 ` Minchan Kim
2015-11-05 1:37 ` Minchan Kim
2015-11-05 1:37 ` Minchan Kim
2015-12-01 22:30 ` John Stultz
2015-12-01 22:30 ` John Stultz
2015-11-04 1:25 ` [PATCH v2 02/13] mm: define MADV_FREE for some arches Minchan Kim
2015-11-04 1:25 ` Minchan Kim
2015-11-04 1:25 ` [PATCH v2 03/13] arch: uapi: asm: mman.h: Let MADV_FREE have same value for all architectures Minchan Kim
2015-11-04 1:25 ` Minchan Kim
2015-11-04 1:25 ` Minchan Kim
2015-11-04 1:25 ` Minchan Kim
2015-11-04 1:25 ` [PATCH v2 04/13] mm: free swp_entry in madvise_free Minchan Kim
2015-11-04 1:25 ` Minchan Kim
2015-11-04 1:25 ` Minchan Kim
2015-11-04 1:25 ` [PATCH v2 05/13] mm: move lazily freed pages to inactive list Minchan Kim
2015-11-04 1:25 ` Minchan Kim
2015-11-04 1:26 ` [PATCH v2 06/13] mm: clear PG_dirty to mark page freeable Minchan Kim
2015-11-04 1:26 ` Minchan Kim
2015-11-04 1:26 ` [PATCH v2 07/13] mm: mark stable page dirty in KSM Minchan Kim
2015-11-04 1:26 ` Minchan Kim
2015-11-04 1:26 ` [PATCH v2 08/13] x86: add pmd_[dirty|mkclean] for THP Minchan Kim
2015-11-04 1:26 ` Minchan Kim
2015-11-04 1:26 ` Minchan Kim
2015-11-04 1:26 ` [PATCH v2 09/13] sparc: " Minchan Kim
2015-11-04 1:26 ` Minchan Kim
2015-11-04 1:26 ` [PATCH v2 10/13] powerpc: " Minchan Kim
2015-11-04 1:26 ` Minchan Kim
2015-11-04 1:26 ` Minchan Kim
2015-11-04 1:26 ` [PATCH v2 11/13] arm: add pmd_mkclean " Minchan Kim
2015-11-04 1:26 ` Minchan Kim
2015-11-04 1:26 ` [PATCH v2 12/13] arm64: " Minchan Kim
2015-11-04 1:26 ` Minchan Kim
2015-11-04 1:26 ` [PATCH v2 13/13] mm: don't split THP page when syscall is called Minchan Kim
2015-11-04 1:26 ` Minchan Kim
2015-12-05 11:10 ` Pavel Machek [this message]
2015-12-05 11:10 ` [PATCH v2 00/13] MADV_FREE support Pavel Machek
2015-12-05 15:51 ` Daniel Micay
2015-12-05 15:51 ` Daniel Micay
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