[RFC 11/11] ARM: avoid flushing I-cache in flush_cache_mm()

[Russell King]

On Fri, Nov 13, 2009 at 04:01:30PM +0100, Gilles Chanteperdrix wrote:
> Russell King wrote:
> > flush_cache_mm() is called in two cases:
> > 1. when a process exits, just before the page tables are torn down.
> >    We can allow the stale lines to evict themselves over time without
> >    causing any harm.
> 
> Is not there any risk to see cache lines evicted at a time when there
> are no longer any page table entries for them? This was said to be a
> problem during the early discussions on FCSE:

The discussion here is about the instruction cache - that doesn't write
back cache lines.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of: