From: Cyrill Gorcunov <gorcunov@gmail.com>
To: Jiri Olsa <jolsa@redhat.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>,
tglx@linutronix.de, mingo@redhat.com, x86@kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] x86_64: disable identity mappings statically
Date: Fri, 11 Feb 2011 20:35:18 +0300 [thread overview]
Message-ID: <4D557356.1050709@gmail.com> (raw)
In-Reply-To: <20110211170722.GA2010@jolsa.brq.redhat.com>
On 02/11/2011 08:07 PM, Jiri Olsa wrote:
> On Fri, Feb 11, 2011 at 08:46:41AM -0800, Eric W. Biederman wrote:
>> Jiri Olsa <jolsa@redhat.com> writes:
>>
>>> hi,
>>>
>>> while browsing the page table setup code, I noticed the x86_64 head
>>> code might not need the identity mappings at all.
>>> It seems it's ok to switch it off completely from the begining,
>>> unless I'm missing something.
>>
>> Have you tested it?
>
> yes, I booted it with no problem
>
Hi Jiri, just wonder -- hibernation still works after that?
Also Xen might/might-not need it as well, and walk_pgd_level
seems to use it as well, no?
--
Cyrill
next prev parent reply other threads:[~2011-02-11 17:35 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-11 14:00 [PATCH] x86_64: disable identity mappings statically Jiri Olsa
2011-02-11 16:46 ` Eric W. Biederman
2011-02-11 17:07 ` Jiri Olsa
2011-02-11 17:35 ` Cyrill Gorcunov [this message]
2011-02-11 17:59 ` Brian Gerst
2011-02-11 19:13 ` Jiri Olsa
2011-02-11 20:19 ` Brian Gerst
2011-02-11 20:40 ` Jiri Olsa
2011-02-11 21:59 ` Brian Gerst
2011-02-12 8:57 ` Jiri Olsa
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