From: "Jörn Engel" <joern@wohnheim.fh-wedel.de>
To: Robert Love <rml@novell.com>
Cc: Samuel Thibault <samuel.thibault@ens-lyon.org>,
Andy Isaacson <adi@hexapodia.org>,
linux-kernel@vger.kernel.org
Subject: Re: wrong madvise(MADV_DONTNEED) semantic
Date: Tue, 28 Jun 2005 22:17:04 +0200 [thread overview]
Message-ID: <20050628201704.GC4453@wohnheim.fh-wedel.de> (raw)
In-Reply-To: <1119989111.6745.21.camel@betsy>
On Tue, 28 June 2005 16:05:11 -0400, Robert Love wrote:
>
> I like the idea (I think someone suggested this early on) of renaming
> the current MADV_DONTNEED to MADV_FREE and then adding a correct
> MADV_DONTNEED.
Imo, that's still a crime against common sense. Madvice should give
the kernel some advice about which data to keep or not to keep in
memory, hence the name. It should *not* tell the kernel to corrupt
data, which currently appears to be the case.
If the application knows 100% that it is the _only_ possible user of
this data and will never again use it, dropping dirty pages might be a
sane option. Effectively that translates to anonymous memory only.
In all other cases, dirty pages should be written back.
> And, as I said, the man page needs clarification.
Definitely.
Jörn
--
Eighty percent of success is showing up.
-- Woody Allen
next prev parent reply other threads:[~2005-06-28 20:20 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-28 13:43 Samuel Thibault
2005-06-28 14:38 ` [Patch] Hotfix for " Jörn Engel
2005-06-28 18:16 ` Andy Isaacson
2005-06-28 18:28 ` Robert Love
2005-06-28 18:53 ` Andy Isaacson
2005-06-28 19:23 ` Robert Love
2005-06-28 19:41 ` Samuel Thibault
2005-06-28 20:03 ` Jörn Engel
2005-06-28 20:05 ` Robert Love
2005-06-28 20:17 ` Jörn Engel [this message]
2005-06-28 20:20 ` Samuel Thibault
2005-06-28 20:30 ` Jörn Engel
2005-06-28 20:37 ` Andy Isaacson
2005-07-05 23:39 ` Darren Hart
2005-06-29 16:53 ` wrong madvise(MADV DONTNEED) semantic Michael Kerrisk
2005-06-29 17:22 ` Jamie Lokier
2005-06-29 16:34 ` Michael Kerrisk
2005-06-28 18:54 ` wrong madvise(MADV_DONTNEED) semantic Samuel Thibault
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