cache aliasing in dup_mmap

[Russell King - ARM Linux]

On Mon, Nov 16, 2009 at 12:23:36PM -0500, Steven Walter wrote:
> On Mon, Nov 16, 2009 at 11:30 AM, Russell King - ARM Linux
> <linux at arm.linux.org.uk> wrote:
> >> I apologize for the late reply.  I have a build with your patches
> >> running in a reboot loop (the easiest way for us to reproduce the
> >> crash).  I should have a good indication of whether the patches fix
> >> the issue by Monday.
> >
> > Any results?
> 
> Yes, SIGSEGV after 88 boots, with a crash that we previously
> identified as caused by this cache corruption issue.  Attached are the
> patches I used, as manually backported to 2.6.18.5.  Stock 2.6.18.5
> would reliably crash in under 1000 reboots, whereas  with my ad-hoc
> fix (also attached) we were able to run 8000 reboots before we ended
> the test.

What is copypage-swl.S ?