From: "H. Peter Anvin" <hpa@zytor.com>
To: Andy Lutomirski <luto@amacapital.net>
Cc: "Theodore Ts'o" <tytso@mit.edu>, Borislav Petkov <bp@alien8.de>,
linux-kernel@vger.kernel.org, x86@kernel.org,
Andrew Lutomirski <luto@mit.edu>
Subject: Re: [PATCH v5] x86: Enable fast strings on Intel if BIOS hasn't already
Date: Wed, 01 May 2013 10:35:14 -0700 [thread overview]
Message-ID: <51815252.4010103@zytor.com> (raw)
In-Reply-To: <CALCETrX0WEGJ0UZz6PyQ4DrnpGg52S0cArDYLQ9Yjz3uic_N4A@mail.gmail.com>
On 05/01/2013 09:54 AM, Andy Lutomirski wrote:
>
> (Just my luck. I'm currently trying to implement WT via PAT by
> stealing a slot from either UC or UC-.)
>
NAK on that. Use a slot in the upper half, perhaps (we already
blacklist the CPUs for which the upper half aren't usable.)
What do you want WT for, anyway?
> Is there any code that memcpys across memory types and expects any
> particularly sensible behavior out of it?
Unlikely (see my post.)
-hpa
next prev parent reply other threads:[~2013-05-01 17:35 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-01 5:46 [PATCH v5] x86: Enable fast strings on Intel if BIOS hasn't already Andy Lutomirski
2013-05-01 11:15 ` Ingo Molnar
2013-05-01 11:33 ` Borislav Petkov
2013-05-01 16:34 ` Theodore Ts'o
2013-05-01 16:42 ` H. Peter Anvin
2013-05-01 16:54 ` Andy Lutomirski
2013-05-01 17:35 ` H. Peter Anvin [this message]
2013-05-01 17:50 ` Andy Lutomirski
2013-05-01 17:54 ` H. Peter Anvin
2013-05-01 18:18 ` Andy Lutomirski
2013-05-10 8:25 ` Ingo Molnar
2013-05-01 17:20 ` Theodore Ts'o
2013-05-01 17:35 ` H. Peter Anvin
2013-05-01 16:51 ` Andi Kleen
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