From: David Mosberger <davidm@napali.hpl.hp.com>
To: linux-ia64@vger.kernel.org
Subject: Re: [Linux-ia64] [PATCH] Performance Patch for TLB misses
Date: Mon, 11 Nov 2002 18:48:27 +0000 [thread overview]
Message-ID: <marc-linux-ia64-105590709805384@msgid-missing> (raw)
In-Reply-To: <marc-linux-ia64-105590709805350@msgid-missing>
>>>>> On Mon, 11 Nov 2002 09:49:49 +0100, Christian Hildner <christian.hildner@hob.de> said:
Christian> Yes, but for the kernel it is allowed also without the
Christian> patch and the the user could insert a duplicate mapping
Christian> for the same physical page but this useless for him
Christian> because of the access rights and also the kernel would
Christian> not use these pages (because the kernel has no knowledge
Christian> of this pages).
Useless to the user, but dangerous to the health of the machine!
Please note that attribute aliasing can lead to a machine-check and
therefore is an absolute no-no (the machine check could be triggered
either by a hardware-prefetch or due to speculative memory accesses
inside the kernel).
--david
next prev parent reply other threads:[~2002-11-11 18:48 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-07 14:00 [Linux-ia64] [PATCH] Performance Patch for TLB misses Christian Hildner
2002-11-07 16:38 ` David Mosberger
2002-11-07 17:14 ` Mario Smarduch
2002-11-11 8:38 ` Christian Hildner
2002-11-11 8:49 ` Christian Hildner
2002-11-11 12:07 ` John Marvin
2002-11-11 18:48 ` David Mosberger [this message]
2002-11-12 8:43 ` Christian Hildner
2002-11-12 17:00 ` David Mosberger
2002-11-12 18:03 ` David Mosberger
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