From: Andi Kleen <ak@muc.de>
To: "Siddha, Suresh B" <suresh.b.siddha@intel.com>
Cc: Ashok Raj <ashok.raj@intel.com>,
linux-kernel@vger.kernel.org, akpm@osdl.org, discuss@x86-64.org
Subject: Re: init and zap low address mappings on demand for cpu hotplug
Date: 26 Sep 2005 08:58:56 +0200
Date: Mon, 26 Sep 2005 08:58:56 +0200 [thread overview]
Message-ID: <20050926065856.GA99750@muc.de> (raw)
In-Reply-To: <20050923172855.D12631@unix-os.sc.intel.com>
> This patch introduces boot_level4_pgt, which will always have low identity
> addresses mapped. Druing boot, all the processors will use this as their
> level4 pgt. On BP, we will switch to init_level4_pgt as soon as we enter
> C code and zap the low mappings as soon as we are done with the usage of
> identity low mapped addresses. On AP's we will zap the low mappings as
> soon as we jump to C code.
Looks good. Thanks Suresh. The boot page tables should be marked __initdata
now, but that can be done in an follow on patch.
i386 should probably get similar treatment.
-Andi
next prev parent reply other threads:[~2005-09-26 6:59 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-21 20:57 init and zap low address mappings on demand for cpu hotplug Ashok Raj
2005-09-21 21:11 ` Andrew Morton
2005-09-21 22:39 ` Ashok Raj
2005-09-22 9:48 ` Andi Kleen
2005-09-24 0:28 ` Siddha, Suresh B
2005-09-26 6:58 ` Andi Kleen [this message]
2005-09-26 23:19 ` Siddha, Suresh B
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