From: Andrew Morton <akpm@digeo.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Ingo Molnar <mingo@elte.hu>, Chris Wedgwood <cw@f00f.org>,
Linus Torvalds <torvalds@transmeta.com>,
Rusty Russell <rusty@rustcorp.com.au>,
linux-kernel@vger.kernel.org
Subject: Re: [patch] 'virtual => physical page mapping cache',vcache-2.5.38-B8
Date: Fri, 27 Sep 2002 11:35:05 -0700 [thread overview]
Message-ID: <3D94A4D9.D458D453@digeo.com> (raw)
In-Reply-To: 1033149675.16758.8.camel@irongate.swansea.linux.org.uk
Alan Cox wrote:
>
> On Fri, 2002-09-27 at 18:53, Ingo Molnar wrote:
> >
> > On Fri, 27 Sep 2002, Chris Wedgwood wrote:
> >
> > > O_DIRECT is allow to break if someone does something silly :) [...]
> >
> > to DMA into a page that does not belong to the process anymore? I doubt
> > that.
>
> Try doing a truncate on a file as an O_DIRECT write is occuring.
> Scribbling into pages you dont own is the least of your problems.
O_DIRECT writes operate under i_sem, which provides exclusion
from trucate. Do you know something which I don't??
next prev parent reply other threads:[~2002-09-27 18:29 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-27 16:24 [patch] 'virtual => physical page mapping cache', vcache-2.5.38-B8 Ingo Molnar
2002-09-27 16:26 ` Linus Torvalds
2002-09-27 16:42 ` Ingo Molnar
2002-09-27 16:47 ` Linus Torvalds
2002-09-27 17:01 ` Ingo Molnar
2002-09-27 17:05 ` Linus Torvalds
2002-09-27 17:33 ` Ingo Molnar
2002-09-27 17:32 ` Linus Torvalds
2002-09-27 17:42 ` Ingo Molnar
2002-09-27 17:48 ` Linus Torvalds
2002-09-27 18:54 ` [patch] 'virtual => physical page mapping cache' take #2, vcache-2.5.38-C4 Ingo Molnar
2002-09-27 19:12 ` Ingo Molnar
2002-10-15 5:15 ` Rusty Russell
2002-09-27 17:44 ` [patch] 'virtual => physical page mapping cache', vcache-2.5.38-B8 Ingo Molnar
2002-09-27 17:42 ` Chris Wedgwood
2002-09-27 17:53 ` Ingo Molnar
2002-09-27 17:59 ` Chris Wedgwood
2002-09-27 18:01 ` Alan Cox
2002-09-27 18:35 ` Andrew Morton [this message]
2002-09-27 19:16 ` [patch] 'virtual => physical page mapping cache',vcache-2.5.38-B8 Alan Cox
2002-09-27 19:25 ` [patch] 'virtual => physical page mappingcache',vcache-2.5.38-B8 Andrew Morton
2002-09-27 20:02 ` Alan Cox
2002-09-28 10:22 ` [patch] 'virtual => physical page mapping cache', vcache-2.5.38-B8 Arjan van de Ven
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