lkml.org 
[lkml]   [2005]   [Nov]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Nick's core remove PageReserved broke vmware...
Quoting r. Hugh Dickins <hugh@veritas.com>:
> Subject: Re: Nick's core remove PageReserved broke vmware...
>
> On Mon, 14 Nov 2005, Michael S. Tsirkin wrote:
> > Quoting Gleb Natapov <gleb@minantech.com>:
> > > On Mon, Nov 14, 2005 at 02:25:35PM +0200, Michael S. Tsirkin wrote:
> > > >
> > > > There's one thing that I have thought about: what happens
> > > > if I set DONTFORK on a page which already has COW set
> > > > (e.g. after fork)?
> > > >
> > > > It seems that the right thing would be to force a page copy -
> > > > otherwise the page can get copied on write.
>
> > Should we worry about this?
>
> About what?

For pages which hardware will only read, not write,
hardware driver does get_user_pages with write cleared.

This means that COW may remain set.

--
MST
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-11-14 15:59    [W:0.186 / U:0.116 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site