From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Jan Engelhardt <jengelh@linux01.gwdg.de>
Cc: Arjan van de Ven <arjan@infradead.org>,
Dong Feng <middle.fengdong@gmail.com>, Andi Kleen <ak@suse.de>,
Nick Piggin <nickpiggin@yahoo.com.au>,
Paul Mackerras <paulus@samba.org>,
Christoph Lameter <clameter@sgi.com>,
David Howells <dhowells@redhat.com>,
linux-kernel@vger.kernel.org
Subject: Re: The 3G (or nG) Kernel Memory Space Offset
Date: Tue, 29 Aug 2006 09:44:41 -0700 [thread overview]
Message-ID: <44F46EF9.2090000@goop.org> (raw)
In-Reply-To: <Pine.LNX.4.61.0608291828540.8682@yvahk01.tjqt.qr>
Jan Engelhardt wrote:
> Since it's all just virtual addresses, is the TLB flush really that much
> different when kernelspace runs from (virtual) 0x00000000-0x3FFFFFFF rather
> than (virtual)0xC000000-0xFFFFFFFF?
>
If kernel and userspace are disjoint, they can be in the same address
space, so there's no need for a TLB flush at all.
J
next prev parent reply other threads:[~2006-08-29 16:44 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-29 14:15 The 3G (or nG) Kernel Memory Space Offset Dong Feng
2006-08-29 14:32 ` Andi Kleen
2006-08-29 14:36 ` Jan Engelhardt
2006-08-29 16:01 ` Dong Feng
2006-08-29 16:05 ` Arjan van de Ven
2006-08-29 16:30 ` Jan Engelhardt
2006-08-29 16:44 ` Jeremy Fitzhardinge [this message]
2006-08-29 16:12 ` Christoph Lameter
2006-08-29 16:16 ` Dong Feng
2006-08-29 16:42 ` Jeremy Fitzhardinge
2006-08-29 18:37 ` Peter Grandi
2006-08-29 21:15 ` Jeremy Fitzhardinge
2006-08-30 6:11 ` Jan Engelhardt
-- strict thread matches above, loose matches on Subject: below --
2006-08-30 4:32 linux
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