From: Andrea Arcangeli <andrea@suse.de>
To: Andrew Morton <akpm@osdl.org>
Cc: pbadari@us.ibm.com, ak@suse.de, hugh@veritas.com,
jdike@addtoit.com, dvhltc@us.ibm.com, linux-mm@kvack.org
Subject: Re: [RFC] madvise(MADV_TRUNCATE)
Date: Fri, 28 Oct 2005 03:10:45 +0200 [thread overview]
Message-ID: <20051028011045.GD5091@opteron.random> (raw)
In-Reply-To: <20051027173243.41ecd335.akpm@osdl.org>
On Thu, Oct 27, 2005 at 05:32:43PM -0700, Andrew Morton wrote:
> hm, so we have a somewhat awkward interface to a very specific thing to
> benefit a closed-source app. That'll go down well ;)
I know. Many of the database features have benefited closed-source apps
first and only later they have the potential to benefit everything else
too. As far as I don't have to run the closed-source apps myself I'm ok.
Plus the fact Badari also came up with a virtual-range interface with
its first MADV_DISCARD patch makes me suspect they'll also have a
benefit for similar reasons compared to the fs interface.
> what - MADV_REMOVE?
No problem with the name change.
> I think it'll need to return -EINVAL for nonlinear vma's?
That would be fine. For tmpfs it may not be too difficult to free the
swap even when the page offsets are sparse. For real fs it would be more
tricky to support many tiny holes. But the real reason I think -EINVAL
is ok, is that I generally dislike nonlinear related complexity because
I dislike nonlinear in the first place (nonlinear avoids vma overhead at
the expense of screwing up paging scalability, it should be used only in
extreme cases were the mapping is mlocked anyway).
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next prev parent reply other threads:[~2005-10-28 1:10 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-10-26 22:49 [RFC] madvise(MADV_TRUNCATE) Badari Pulavarty
2005-10-27 8:38 ` Andi Kleen
2005-10-27 13:17 ` Andrea Arcangeli
2005-10-27 15:00 ` Badari Pulavarty
2005-10-27 15:11 ` Andrea Arcangeli
2005-10-27 18:20 ` Andrew Morton
2005-10-27 18:35 ` Badari Pulavarty
2005-10-27 18:50 ` Andrew Morton
2005-10-27 19:40 ` Gerrit Huizenga
2005-10-27 19:56 ` Andi Kleen
2005-10-27 23:21 ` Darren Hart
2005-10-27 20:05 ` Theodore Ts'o
2005-10-27 20:16 ` Andrea Arcangeli
2005-10-28 1:42 ` Badari Pulavarty
2005-10-28 16:33 ` Theodore Ts'o
2005-10-27 20:22 ` Jeff Dike
2005-10-27 20:04 ` Andrea Arcangeli
2005-10-27 20:50 ` Andrew Morton
2005-10-27 21:37 ` Andrea Arcangeli
2005-10-27 22:23 ` Andrew Morton
2005-10-27 23:05 ` Badari Pulavarty
2005-10-27 23:16 ` Andrew Morton
2005-10-27 23:33 ` Peter Chubb
2005-10-28 0:22 ` Andrea Arcangeli
2005-10-28 0:32 ` Andrew Morton
2005-10-28 1:10 ` Andrea Arcangeli [this message]
2005-10-28 1:27 ` Badari Pulavarty
2005-10-28 2:00 ` Andrew Morton
2005-10-27 22:32 ` Badari Pulavarty
2005-10-27 23:28 ` Peter Chubb
2005-10-27 23:49 ` Andrew Morton
2005-10-27 23:56 ` Nathan Scott
2005-10-28 0:15 ` Andrea Arcangeli
2005-10-27 23:59 ` Peter Chubb
2005-10-28 3:46 ` Jeff Dike
2005-10-28 11:03 ` Blaisorblade
2005-10-28 13:29 ` Andrea Arcangeli
2005-10-28 16:56 ` Blaisorblade
2005-10-28 16:16 ` Badari Pulavarty
2005-10-28 18:40 ` Blaisorblade
2005-10-28 18:56 ` Badari Pulavarty
2005-10-29 0:35 ` Badari Pulavarty
2005-10-28 16:19 ` Badari Pulavarty
2005-10-28 17:10 ` Blaisorblade
2005-10-28 18:28 ` Jeff Dike
2005-10-28 18:44 ` Blaisorblade
2005-10-28 18:42 ` Jeff Dike
2005-10-28 18:54 ` Badari Pulavarty
2005-10-29 0:03 ` Badari Pulavarty
2005-10-29 2:51 ` Jeff Dike
2005-10-31 16:34 ` Badari Pulavarty
2005-10-31 19:15 ` Badari Pulavarty
2005-10-31 19:49 ` [RFC][PATCH] madvise(MADV_TRUNCATE) Badari Pulavarty
2005-11-01 0:05 ` Jeff Dike
2005-11-02 1:15 ` [PATCH] 2.6.14 patch for supporting madvise(MADV_FREE) Badari Pulavarty
2005-11-02 1:43 ` Andrea Arcangeli
2005-11-02 15:49 ` Badari Pulavarty
2005-11-02 16:12 ` [PATCH] 2.6.14 patch for supporting madvise(MADV_REMOVE) Badari Pulavarty
2005-11-02 19:54 ` New bug in patch and existing Linux code - race with install_page() (was: Re: [PATCH] 2.6.14 patch for supporting madvise(MADV_REMOVE)) Blaisorblade
2005-11-02 20:12 ` Hugh Dickins
2005-11-02 20:45 ` Hugh Dickins
2005-11-02 21:36 ` Badari Pulavarty
2005-11-02 21:55 ` Hugh Dickins
2005-11-02 22:02 ` Badari Pulavarty
2005-11-12 0:25 ` [PATCH] 2.6.14 patch for supporting madvise(MADV_REMOVE) Andrew Morton
2005-11-12 0:34 ` Badari Pulavarty
2005-11-12 1:43 ` Andrew Morton
2005-11-12 4:41 ` Badari Pulavarty
2006-01-16 13:06 ` differences between MADV_FREE and MADV_DONTNEED Andrea Arcangeli
2006-01-16 16:02 ` Suleiman Souhlal
2006-01-16 16:28 ` Andrea Arcangeli
2006-01-16 17:03 ` Suleiman Souhlal
2006-01-16 17:24 ` Andrea Arcangeli
2006-01-16 21:43 ` Eric W. Biederman
2006-01-17 0:24 ` Suleiman Souhlal
2006-01-17 1:04 ` Nicholas Miell
2006-01-17 12:43 ` Christoph Hellwig
2006-01-17 18:23 ` Eric W. Biederman
2006-01-17 22:55 ` Nicholas Miell
2007-03-01 18:11 ` Samuel Thibault
2006-01-17 19:06 ` Badari Pulavarty
2006-01-17 1:06 ` Blaisorblade
2006-01-17 1:33 ` Andrea Arcangeli
2005-11-12 0:34 ` [PATCH] 2.6.14 patch for supporting madvise(MADV_REMOVE) Andrew Morton
2005-10-28 17:55 ` [RFC] madvise(MADV_TRUNCATE) Blaisorblade
2005-10-28 21:23 ` Theodore Ts'o
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