Re: [BUGFIX][PATCH] DO flush icache before set_pte() on ia64.
From: KAMEZAWA Hiroyuki
Date: Fri Jul 06 2007 - 17:57:47 EST
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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