linux-kernel - Re: [PATCH] flush cache fixes for ia64 [2/2] sync icache dcache

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Date:	Sat, 28 Jul 2007 00:18:19 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	Zoltan.Menyhart@...l.net, linux-kernel@...r.kernel.org,
	linux-ia64@...r.kernel.org, tony.luck@...el.com,
	nickpiggin@...oo.com.au, clameter@....com
Subject: Re: [PATCH] flush cache fixes for ia64 [2/2] sync icache dcache

On Sat, 28 Jul 2007 00:02:23 +0900
KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> wrote:

> On Fri, 27 Jul 2007 16:16:27 +0200
> Zoltan Menyhart <Zoltan.Menyhart@...l.net> wrote:
> 
> > Do you really need a "sync_icache_dcache()" in "do_wp_page()"?
> > I guess it is only needed when the EXEC bit of the PTE gets turned on.
> > 
> Ah, sorry. do_wp_page() without page copy (reuse case) doesn't need sync.
> 
> About page copy case
> There was an issue that Java receives SIGILL because lazy_mmu_prot_update()
> is called before set_pte(). Then, Only do_wp_page() calls lazy_mmu_prot_update()
            after....
Sorry..

-Kame
> before set_pte().
> 
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