From: Armin Rigo <arigo@tunes.org>
To: Andi Kleen <andi@firstfloor.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
peterz@infradead.org, mingo@kernel.org
Subject: Re: [PATCHv2 0/2] remap_file_pages() decommission
Date: Mon, 12 May 2014 09:50:20 +0200 [thread overview]
Message-ID: <CAMSv6X1_BzDE1ytPtdGQKK=OJJVpsPrwp2dgSZxA=A03n4rWJw@mail.gmail.com> (raw)
In-Reply-To: <87tx8v4qin.fsf@tassilo.jf.intel.com>
Hi Andi,
On 12 May 2014 05:36, Andi Kleen <andi@firstfloor.org> wrote:
>> Here is a note from the PyPy project (mentioned earlier in this
>> thread, and at https://lwn.net/Articles/587923/ ).
>
> Your use is completely bogus. remap_file_pages() pins everything
> and disables any swapping for the area.
? No. Trying this example: http://bpaste.net/show/fCUTnR9mDzJ2IEKrQLAR/
...really allocates 4GB of RAM, and on a 4GB machine it causes some
swapping. It seems to work fine. I'm not sure to understand you.
I'm also not sure that a property as essential as "disables swapping"
should be omitted from the man page; if so, that would be a real man
page bug.
A bientôt,
Armin.
WARNING: multiple messages have this Message-ID (diff)
From: Armin Rigo <arigo@tunes.org>
To: Andi Kleen <andi@firstfloor.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
peterz@infradead.org, mingo@kernel.org
Subject: Re: [PATCHv2 0/2] remap_file_pages() decommission
Date: Mon, 12 May 2014 09:50:20 +0200 [thread overview]
Message-ID: <CAMSv6X1_BzDE1ytPtdGQKK=OJJVpsPrwp2dgSZxA=A03n4rWJw@mail.gmail.com> (raw)
In-Reply-To: <87tx8v4qin.fsf@tassilo.jf.intel.com>
Hi Andi,
On 12 May 2014 05:36, Andi Kleen <andi@firstfloor.org> wrote:
>> Here is a note from the PyPy project (mentioned earlier in this
>> thread, and at https://lwn.net/Articles/587923/ ).
>
> Your use is completely bogus. remap_file_pages() pins everything
> and disables any swapping for the area.
? No. Trying this example: http://bpaste.net/show/fCUTnR9mDzJ2IEKrQLAR/
...really allocates 4GB of RAM, and on a 4GB machine it causes some
swapping. It seems to work fine. I'm not sure to understand you.
I'm also not sure that a property as essential as "disables swapping"
should be omitted from the man page; if so, that would be a real man
page bug.
A bientôt,
Armin.
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next prev parent reply other threads:[~2014-05-12 7:51 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-08 12:41 [PATCHv2 0/2] remap_file_pages() decommission Kirill A. Shutemov
2014-05-08 12:41 ` Kirill A. Shutemov
2014-05-08 12:41 ` [PATCH 1/2] mm: mark remap_file_pages() syscall as deprecated Kirill A. Shutemov
2014-05-08 12:41 ` Kirill A. Shutemov
2014-06-12 5:48 ` Michael Kerrisk
2014-06-12 5:48 ` Michael Kerrisk
2014-06-12 5:48 ` Michael Kerrisk
2014-06-12 9:40 ` Kirill A. Shutemov
2014-06-12 9:40 ` Kirill A. Shutemov
2014-06-12 9:40 ` Kirill A. Shutemov
2014-06-12 9:44 ` Michael Kerrisk (man-pages)
2014-06-12 9:44 ` Michael Kerrisk (man-pages)
2014-05-08 12:41 ` [PATCH 2/2] mm: replace remap_file_pages() syscall with emulation Kirill A. Shutemov
2014-05-08 12:41 ` Kirill A. Shutemov
2014-05-08 21:57 ` Andrew Morton
2014-05-08 21:57 ` Andrew Morton
2014-05-12 15:11 ` Sasha Levin
2014-05-12 15:11 ` Sasha Levin
2014-05-12 17:05 ` Kirill A. Shutemov
2014-05-12 17:05 ` Kirill A. Shutemov
2014-05-14 20:52 ` Sasha Levin
2014-05-14 20:52 ` Sasha Levin
2014-05-14 21:17 ` Kirill A. Shutemov
2014-05-14 21:17 ` Kirill A. Shutemov
2014-05-14 21:40 ` Andrew Morton
2014-05-14 21:40 ` Andrew Morton
2014-05-13 7:32 ` Armin Rigo
2014-05-13 7:32 ` Armin Rigo
2014-05-13 12:57 ` Sasha Levin
2014-05-13 12:57 ` Sasha Levin
2014-05-08 15:35 ` [PATCHv2 0/2] remap_file_pages() decommission Linus Torvalds
2014-05-08 15:35 ` Linus Torvalds
2014-05-08 15:44 ` Armin Rigo
2014-05-08 15:44 ` Armin Rigo
2014-05-08 16:02 ` Kirill A. Shutemov
2014-05-08 16:02 ` Kirill A. Shutemov
2014-05-08 16:08 ` Linus Torvalds
2014-05-08 16:08 ` Linus Torvalds
2014-05-09 14:05 ` Kirill A. Shutemov
2014-05-09 14:05 ` Kirill A. Shutemov
2014-05-09 15:14 ` Linus Torvalds
2014-05-09 15:14 ` Linus Torvalds
2014-05-09 18:19 ` Kirill A. Shutemov
2014-05-09 18:19 ` Kirill A. Shutemov
2014-05-12 12:43 ` Kirill A. Shutemov
2014-05-12 12:43 ` Kirill A. Shutemov
2014-05-12 14:59 ` Konstantin Khlebnikov
2014-05-12 14:59 ` Konstantin Khlebnikov
2014-05-12 3:36 ` Andi Kleen
2014-05-12 3:36 ` Andi Kleen
2014-05-12 5:16 ` Konstantin Khlebnikov
2014-05-12 5:16 ` Konstantin Khlebnikov
2014-05-12 7:50 ` Armin Rigo [this message]
2014-05-12 7:50 ` Armin Rigo
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