From: "H. Peter Anvin" <hpa@zytor.com>
To: Toshi Kani <toshi.kani@hp.com>
Cc: Andy Lutomirski <luto@amacapital.net>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Arnd Bergmann <arnd@arndb.de>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Juergen Gross <jgross@suse.com>,
Stefan Bader <stefan.bader@canonical.com>,
Henrique de Moraes Holschuh <hmh@hmh.eng.br>,
Yigal Korman <yigal@plexistor.com>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Subject: Re: [PATCH v2 2/6] x86, mm, pat: Change reserve_memtype() to handle WT
Date: Wed, 10 Sep 2014 15:00:17 -0700 [thread overview]
Message-ID: <5410C9F1.7030603@zytor.com> (raw)
In-Reply-To: <1410385673.28990.313.camel@misato.fc.hp.com>
On 09/10/2014 02:47 PM, Toshi Kani wrote:
>>
>> Yes. Don't think of it as PAT vs non-PAT. Think of it as a specific
>> set of cache types available on different processors. The fact that you
>> may have to frob an MSR to initialize it is almost trivial in comparison.
>
> Right.
>
In that sense the Xen "fixed PAT" fits right in.
-hpa
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WARNING: multiple messages have this Message-ID (diff)
From: "H. Peter Anvin" <hpa@zytor.com>
To: Toshi Kani <toshi.kani@hp.com>
Cc: Andy Lutomirski <luto@amacapital.net>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Arnd Bergmann <arnd@arndb.de>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Juergen Gross <jgross@suse.com>,
Stefan Bader <stefan.bader@canonical.com>,
Henrique de Moraes Holschuh <hmh@hmh.eng.br>,
Yigal Korman <yigal@plexistor.com>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Subject: Re: [PATCH v2 2/6] x86, mm, pat: Change reserve_memtype() to handle WT
Date: Wed, 10 Sep 2014 15:00:17 -0700 [thread overview]
Message-ID: <5410C9F1.7030603@zytor.com> (raw)
In-Reply-To: <1410385673.28990.313.camel@misato.fc.hp.com>
On 09/10/2014 02:47 PM, Toshi Kani wrote:
>>
>> Yes. Don't think of it as PAT vs non-PAT. Think of it as a specific
>> set of cache types available on different processors. The fact that you
>> may have to frob an MSR to initialize it is almost trivial in comparison.
>
> Right.
>
In that sense the Xen "fixed PAT" fits right in.
-hpa
next prev parent reply other threads:[~2014-09-10 22:00 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-10 16:51 [PATCH v2 0/6] Support Write-Through mapping on x86 Toshi Kani
2014-09-10 16:51 ` Toshi Kani
2014-09-10 16:51 ` [PATCH v2 1/6] x86, mm, pat: Set WT to PA4 slot of PAT MSR Toshi Kani
2014-09-10 16:51 ` Toshi Kani
2014-09-12 19:33 ` Konrad Rzeszutek Wilk
2014-09-12 19:33 ` Konrad Rzeszutek Wilk
2014-09-12 20:45 ` Toshi Kani
2014-09-12 20:45 ` Toshi Kani
2014-09-10 16:51 ` [PATCH v2 2/6] x86, mm, pat: Change reserve_memtype() to handle WT Toshi Kani
2014-09-10 16:51 ` Toshi Kani
2014-09-10 18:26 ` Andy Lutomirski
2014-09-10 18:26 ` Andy Lutomirski
2014-09-10 19:14 ` H. Peter Anvin
2014-09-10 19:14 ` H. Peter Anvin
2014-09-10 19:30 ` Toshi Kani
2014-09-10 19:30 ` Toshi Kani
2014-09-10 20:14 ` H. Peter Anvin
2014-09-10 20:14 ` H. Peter Anvin
2014-09-10 20:30 ` Toshi Kani
2014-09-10 20:30 ` Toshi Kani
2014-09-10 21:06 ` Andy Lutomirski
2014-09-10 21:06 ` Andy Lutomirski
2014-09-10 21:11 ` Toshi Kani
2014-09-10 21:11 ` Toshi Kani
2014-09-10 21:27 ` Andy Lutomirski
2014-09-10 21:27 ` Andy Lutomirski
2014-09-10 21:25 ` Toshi Kani
2014-09-10 21:25 ` Toshi Kani
2014-09-10 21:39 ` H. Peter Anvin
2014-09-10 21:39 ` H. Peter Anvin
2014-09-10 21:47 ` Toshi Kani
2014-09-10 21:47 ` Toshi Kani
2014-09-10 22:00 ` H. Peter Anvin [this message]
2014-09-10 22:00 ` H. Peter Anvin
2014-09-10 23:24 ` Toshi Kani
2014-09-10 23:24 ` Toshi Kani
2014-09-10 21:39 ` H. Peter Anvin
2014-09-10 21:39 ` H. Peter Anvin
2014-09-10 20:31 ` Andy Lutomirski
2014-09-10 20:31 ` Andy Lutomirski
2014-09-12 19:41 ` Konrad Rzeszutek Wilk
2014-09-12 19:41 ` Konrad Rzeszutek Wilk
2014-09-10 16:51 ` [PATCH v2 3/6] x86, mm, asm-gen: Add ioremap_wt() for WT Toshi Kani
2014-09-10 16:51 ` Toshi Kani
2014-09-10 18:29 ` Andy Lutomirski
2014-09-10 18:29 ` Andy Lutomirski
2014-09-10 19:40 ` Toshi Kani
2014-09-10 19:40 ` Toshi Kani
2014-09-10 20:08 ` Andy Lutomirski
2014-09-10 20:08 ` Andy Lutomirski
2014-09-12 19:42 ` Konrad Rzeszutek Wilk
2014-09-12 19:42 ` Konrad Rzeszutek Wilk
2014-09-10 16:51 ` [PATCH v2 4/6] x86, mm: Add set_memory_wt() " Toshi Kani
2014-09-10 16:51 ` Toshi Kani
2014-09-12 19:47 ` Konrad Rzeszutek Wilk
2014-09-12 19:47 ` Konrad Rzeszutek Wilk
2014-09-10 16:51 ` [PATCH v2 5/6] x86, mm, pat: Add pgprot_writethrough() " Toshi Kani
2014-09-10 16:51 ` Toshi Kani
2014-09-12 19:47 ` Konrad Rzeszutek Wilk
2014-09-12 19:47 ` Konrad Rzeszutek Wilk
2014-09-10 16:51 ` [PATCH v2 6/6] x86, pat: Update documentation for WT changes Toshi Kani
2014-09-10 16:51 ` Toshi Kani
2014-09-10 18:30 ` Andy Lutomirski
2014-09-10 18:30 ` Andy Lutomirski
2014-09-10 20:12 ` Toshi Kani
2014-09-10 20:12 ` Toshi Kani
2014-09-10 20:29 ` Andy Lutomirski
2014-09-10 20:29 ` Andy Lutomirski
2014-09-10 21:34 ` Toshi Kani
2014-09-10 21:34 ` Toshi Kani
2014-09-15 21:19 ` Toshi Kani
2014-09-15 21:19 ` Toshi Kani
2014-09-16 1:22 ` Andy Lutomirski
2014-09-16 1:22 ` Andy Lutomirski
2014-09-16 16:52 ` Toshi Kani
2014-09-16 16:52 ` Toshi Kani
2014-09-16 21:45 ` Yigal Korman
2014-09-16 21:45 ` Yigal Korman
2014-09-16 22:13 ` Toshi Kani
2014-09-16 22:13 ` Toshi Kani
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