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From: Sasha Levin <sasha.levin@oracle.com>
To: Armin Rigo <arigo@tunes.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	peterz@infradead.org, mingo@kernel.org
Subject: Re: [PATCH 2/2] mm: replace remap_file_pages() syscall with emulation
Date: Tue, 13 May 2014 08:57:41 -0400	[thread overview]
Message-ID: <537216C5.7050204@oracle.com> (raw)
In-Reply-To: <CAMSv6X0yg4haVtUifFrdkCCZjJV-TLXJ-KsiCPiBue0Y0qNTcQ@mail.gmail.com>

On 05/13/2014 03:32 AM, Armin Rigo wrote:
> Hi Sasha,
> 
> On 12 May 2014 17:11, Sasha Levin <sasha.levin@oracle.com> wrote:
>> Since we can't find any actual users,
> 
> The PyPy project doesn't count as an "actual user"?  It's not just an
> idea in the air.  It's beta code that is already released (and open
> source):
> 
> http://morepypy.blogspot.ch/2014/04/stm-results-and-second-call-for.html
> 
> The core library is available from there (see the test suite in c7/test/):
> 
> https://bitbucket.org/pypy/stmgc
> 
> I already reacted to the discussion here by making remap_file_pages()
> optional (#undef USE_REMAP_FILE_PAGES) but didn't measure the
> performance impact of this, if any (I expect it to be reasonable).
> Still, if you're looking for a real piece of code using
> remap_file_pages(), it's one.

Oh, I don't have anything against PyPy, I just wasn't aware it used
remap_file_pages() (I think I've missed the discussion in the parallel
thread).

Indeed it is a user, have you tried it with a kernel that is running
Kirill's patch set to replace remap_file_pages()?


Thanks,
Sasha


  reply	other threads:[~2014-05-13 12:58 UTC|newest]

Thread overview: 26+ 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 ` [PATCH 1/2] mm: mark remap_file_pages() syscall as deprecated Kirill A. Shutemov
2014-06-12  5:48   ` Michael Kerrisk
2014-06-12  9:40     ` Kirill A. Shutemov
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 21:57   ` Andrew Morton
2014-05-12 15:11     ` Sasha Levin
2014-05-12 17:05       ` Kirill A. Shutemov
2014-05-14 20:52         ` Sasha Levin
2014-05-14 21:17           ` Kirill A. Shutemov
2014-05-14 21:40             ` Andrew Morton
2014-05-13  7:32       ` Armin Rigo
2014-05-13 12:57         ` Sasha Levin [this message]
2014-05-08 15:35 ` [PATCHv2 0/2] remap_file_pages() decommission Linus Torvalds
2014-05-08 15:44 ` Armin Rigo
2014-05-08 16:02   ` Kirill A. Shutemov
2014-05-08 16:08     ` Linus Torvalds
2014-05-09 14:05       ` Kirill A. Shutemov
2014-05-09 15:14         ` Linus Torvalds
2014-05-09 18:19           ` Kirill A. Shutemov
2014-05-12 12:43           ` Kirill A. Shutemov
2014-05-12 14:59             ` Konstantin Khlebnikov
2014-05-12  3:36   ` Andi Kleen
2014-05-12  5:16     ` Konstantin Khlebnikov
2014-05-12  7:50     ` Armin Rigo

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