Re: [BUGFIX][PATCH] DO flush icache before set_pte() on ia64.

[KAMEZAWA Hiroyuki]

On Fri, 6 Jul 2007 10:32:29 -0700 (PDT)
Christoph Lameter <clameter@xxxxxxx> wrote:

> I am a bit worried about the performance impact of all this flushing? What 
> is the worst case scenario here?
> 

IMHO....
When a user set VM_EXEC to their anonymous memory intentionally and
does many page faults.

I myself don't think (file's) page cache flushing is not so heavy work because
PG_arch_1 guarantees that icache flushing occurs just once at the first 
read in the system.

Thanks,
-Kame

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