From: "H. Peter Anvin" <hpa@zytor.com>
To: Tejun Heo <tj@kernel.org>
Cc: Toshi Kani <toshi.kani@hp.com>,
Zhang Yanfei <zhangyanfei.yes@gmail.com>,
Tang Chen <tangchen@cn.fujitsu.com>,
konrad.wilk@oracle.com, robert.moore@intel.com,
lv.zheng@intel.com, rjw@sisk.pl, lenb@kernel.org,
tglx@linutronix.de, mingo@elte.hu, akpm@linux-foundation.org,
trenn@suse.de, yinghai@kernel.org, jiang.liu@huawei.com,
wency@cn.fujitsu.com, laijs@cn.fujitsu.com,
isimatu.yasuaki@jp.fujitsu.com, izumi.taku@jp.fujitsu.com,
mgorman@suse.de, minchan@kernel.org, mina86@mina86.com,
gong.chen@linux.intel.com, vasilis.liaskovitis@profitbricks.com,
lwoodman@redhat.com, riel@redhat.com, jweiner@redhat.com,
prarit@redhat.com, zhangyanfei@cn.fujitsu.com,
yanghy@cn.fujitsu.com, x86@kernel.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-acpi@vger.ker
Subject: Re: [PATCH 0/8] x86, acpi: Move acpi_initrd_override() earlier.
Date: Fri, 23 Aug 2013 16:24:06 +0200 [thread overview]
Message-ID: <bf688aac-4080-4ac6-83cd-fd66cef6ce1a@email.android.com> (raw)
In-Reply-To: <20130823141924.GA3277@htj.dyndns.org>
Well... relying on MTRRs is a big cost in complexity and failure modes.
Tejun Heo <tj@kernel.org> wrote:
>Hello,
>
>On Fri, Aug 23, 2013 at 03:08:55PM +0200, H. Peter Anvin wrote:
>> What is the point of 1G+MTRR? If there are caching differences the
>> TLB will fracture the pages anyway.
>
>Ah, right. Consuming less memory / cachelines would still be a small
>advantage tho unless creating split TLB from larger mapping is
>noticeably less efficient. If the extra logic to do that is small,
>which I think it'd be, it'd be a gain at almost no cost.
>
>Thanks.
--
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WARNING: multiple messages have this Message-ID (diff)
From: "H. Peter Anvin" <hpa@zytor.com>
To: Tejun Heo <tj@kernel.org>
Cc: Toshi Kani <toshi.kani@hp.com>,
Zhang Yanfei <zhangyanfei.yes@gmail.com>,
Tang Chen <tangchen@cn.fujitsu.com>,
konrad.wilk@oracle.com, robert.moore@intel.com,
lv.zheng@intel.com, rjw@sisk.pl, lenb@kernel.org,
tglx@linutronix.de, mingo@elte.hu, akpm@linux-foundation.org,
trenn@suse.de, yinghai@kernel.org, jiang.liu@huawei.com,
wency@cn.fujitsu.com, laijs@cn.fujitsu.com,
isimatu.yasuaki@jp.fujitsu.com, izumi.taku@jp.fujitsu.com,
mgorman@suse.de, minchan@kernel.org, mina86@mina86.com,
gong.chen@linux.intel.com, vasilis.liaskovitis@profitbricks.com,
lwoodman@redhat.com, riel@redhat.com, jweiner@redhat.com,
prarit@redhat.com, zhangyanfei@cn.fujitsu.com,
yanghy@cn.fujitsu.com, x86@kernel.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-acpi@vger.kernel.org
Subject: Re: [PATCH 0/8] x86, acpi: Move acpi_initrd_override() earlier.
Date: Fri, 23 Aug 2013 16:24:06 +0200 [thread overview]
Message-ID: <bf688aac-4080-4ac6-83cd-fd66cef6ce1a@email.android.com> (raw)
In-Reply-To: <20130823141924.GA3277@htj.dyndns.org>
Well... relying on MTRRs is a big cost in complexity and failure modes.
Tejun Heo <tj@kernel.org> wrote:
>Hello,
>
>On Fri, Aug 23, 2013 at 03:08:55PM +0200, H. Peter Anvin wrote:
>> What is the point of 1G+MTRR? If there are caching differences the
>> TLB will fracture the pages anyway.
>
>Ah, right. Consuming less memory / cachelines would still be a small
>advantage tho unless creating split TLB from larger mapping is
>noticeably less efficient. If the extra logic to do that is small,
>which I think it'd be, it'd be a gain at almost no cost.
>
>Thanks.
--
Sent from my mobile phone. Please excuse brevity and lack of formatting.
WARNING: multiple messages have this Message-ID (diff)
From: "H. Peter Anvin" <hpa@zytor.com>
To: Tejun Heo <tj@kernel.org>
Cc: Toshi Kani <toshi.kani@hp.com>,
Zhang Yanfei <zhangyanfei.yes@gmail.com>,
Tang Chen <tangchen@cn.fujitsu.com>,
konrad.wilk@oracle.com, robert.moore@intel.com,
lv.zheng@intel.com, rjw@sisk.pl, lenb@kernel.org,
tglx@linutronix.de, mingo@elte.hu, akpm@linux-foundation.org,
trenn@suse.de, yinghai@kernel.org, jiang.liu@huawei.com,
wency@cn.fujitsu.com, laijs@cn.fujitsu.com,
isimatu.yasuaki@jp.fujitsu.com, izumi.taku@jp.fujitsu.com,
mgorman@suse.de, minchan@kernel.org, mina86@mina86.com,
gong.chen@linux.intel.com, vasilis.liaskovitis@profitbricks.com,
lwoodman@redhat.com, riel@redhat.com, jweiner@redhat.com,
prarit@redhat.com, zhangyanfei@cn.fujitsu.com,
yanghy@cn.fujitsu.com, x86@kernel.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-acpi@vger.kernel.org
Subject: Re: [PATCH 0/8] x86, acpi: Move acpi_initrd_override() earlier.
Date: Fri, 23 Aug 2013 16:24:06 +0200 [thread overview]
Message-ID: <bf688aac-4080-4ac6-83cd-fd66cef6ce1a@email.android.com> (raw)
In-Reply-To: <20130823141924.GA3277@htj.dyndns.org>
Well... relying on MTRRs is a big cost in complexity and failure modes.
Tejun Heo <tj@kernel.org> wrote:
>Hello,
>
>On Fri, Aug 23, 2013 at 03:08:55PM +0200, H. Peter Anvin wrote:
>> What is the point of 1G+MTRR? If there are caching differences the
>> TLB will fracture the pages anyway.
>
>Ah, right. Consuming less memory / cachelines would still be a small
>advantage tho unless creating split TLB from larger mapping is
>noticeably less efficient. If the extra logic to do that is small,
>which I think it'd be, it'd be a gain at almost no cost.
>
>Thanks.
--
Sent from my mobile phone. Please excuse brevity and lack of formatting.
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2013-08-23 14:24 UTC|newest]
Thread overview: 116+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-21 10:15 [PATCH 0/8] x86, acpi: Move acpi_initrd_override() earlier Tang Chen
2013-08-21 10:15 ` Tang Chen
2013-08-21 10:15 ` [PATCH 1/8] x86: Make get_ramdisk_{image|size}() global Tang Chen
2013-08-21 10:15 ` Tang Chen
2013-08-21 10:15 ` [PATCH 2/8] x86, microcode: Use get_ramdisk_{image|size}() in microcode handling Tang Chen
2013-08-21 10:15 ` Tang Chen
2013-08-21 10:15 ` [PATCH 3/8] x86, acpi: Move table_sigs[] to stack Tang Chen
2013-08-21 10:15 ` Tang Chen
2013-08-21 10:15 ` [PATCH 4/8] x86, acpi, brk: Extend BRK 256KB to store acpi override tables Tang Chen
2013-08-21 10:15 ` Tang Chen
2013-08-21 10:15 ` [PATCH 5/8] x86, brk: Make extend_brk() available with va/pa Tang Chen
2013-08-21 10:15 ` Tang Chen
2013-08-21 12:26 ` Konrad Rzeszutek Wilk
2013-08-21 12:26 ` Konrad Rzeszutek Wilk
2013-08-21 12:35 ` H. Peter Anvin
2013-08-21 12:35 ` H. Peter Anvin
2013-08-21 14:42 ` Konrad Rzeszutek Wilk
2013-08-21 14:42 ` Konrad Rzeszutek Wilk
2013-08-21 15:04 ` H. Peter Anvin
2013-08-21 15:04 ` H. Peter Anvin
2013-08-21 10:15 ` [PATCH 6/8] x86, acpi: Make acpi_initrd_override() available with va or pa Tang Chen
2013-08-21 10:15 ` Tang Chen
2013-08-21 10:15 ` [PATCH 7/8] x86, acpi, brk: Make early_alloc_acpi_override_tables_buf() available with va/pa Tang Chen
2013-08-21 10:15 ` Tang Chen
2013-08-21 10:15 ` [PATCH 8/8] x86, acpi: Do acpi_initrd_override() earlier in head_32.S/head64.c Tang Chen
2013-08-21 10:15 ` Tang Chen
2013-08-21 10:42 ` [PATCH 0/8] x86, acpi: Move acpi_initrd_override() earlier Tang Chen
2013-08-21 10:42 ` Tang Chen
2013-08-21 13:06 ` Tejun Heo
2013-08-21 13:06 ` Tejun Heo
2013-08-21 15:00 ` Zhang Yanfei
2013-08-21 15:00 ` Zhang Yanfei
2013-08-21 15:36 ` Tejun Heo
2013-08-21 15:36 ` Tejun Heo
2013-08-21 19:31 ` Toshi Kani
2013-08-21 19:31 ` Toshi Kani
2013-08-21 19:54 ` Tejun Heo
2013-08-21 19:54 ` Tejun Heo
2013-08-21 20:29 ` Toshi Kani
2013-08-21 20:29 ` Toshi Kani
2013-08-21 20:40 ` Tejun Heo
2013-08-21 20:40 ` Tejun Heo
2013-08-21 22:36 ` Toshi Kani
2013-08-21 22:36 ` Toshi Kani
2013-08-22 3:32 ` Tejun Heo
2013-08-22 3:32 ` Tejun Heo
2013-08-22 15:52 ` Toshi Kani
2013-08-22 15:52 ` Toshi Kani
2013-08-22 18:31 ` Tejun Heo
2013-08-22 18:31 ` Tejun Heo
2013-08-22 19:39 ` Zhang Yanfei
2013-08-22 19:39 ` Zhang Yanfei
2013-08-22 19:45 ` Tejun Heo
2013-08-22 19:45 ` Tejun Heo
2013-08-22 20:11 ` Toshi Kani
2013-08-22 20:11 ` Toshi Kani
2013-08-22 20:21 ` Tejun Heo
2013-08-22 20:21 ` Tejun Heo
2013-08-22 20:35 ` Tejun Heo
2013-08-22 20:35 ` Tejun Heo
2013-08-22 21:06 ` Toshi Kani
2013-08-22 21:06 ` Toshi Kani
2013-08-22 21:21 ` Tejun Heo
2013-08-22 21:21 ` Tejun Heo
2013-08-22 22:17 ` Toshi Kani
2013-08-22 22:17 ` Toshi Kani
2013-08-23 13:04 ` Tejun Heo
2013-08-23 13:04 ` Tejun Heo
2013-08-23 13:08 ` H. Peter Anvin
2013-08-23 13:08 ` H. Peter Anvin
2013-08-23 14:19 ` Tejun Heo
2013-08-23 14:19 ` Tejun Heo
2013-08-23 14:24 ` H. Peter Anvin [this message]
2013-08-23 14:24 ` H. Peter Anvin
2013-08-23 14:24 ` H. Peter Anvin
2013-08-23 14:35 ` Tejun Heo
2013-08-23 14:35 ` Tejun Heo
2013-08-23 14:57 ` Tejun Heo
2013-08-23 14:57 ` Tejun Heo
2013-08-23 16:14 ` Toshi Kani
2013-08-23 16:14 ` Toshi Kani
2013-08-23 16:24 ` Tejun Heo
2013-08-23 16:24 ` Tejun Heo
2013-08-23 17:13 ` Toshi Kani
2013-08-23 17:13 ` Toshi Kani
2013-08-23 17:29 ` Zhang Yanfei
2013-08-23 17:29 ` Zhang Yanfei
2013-08-23 16:54 ` Zhang Yanfei
2013-08-23 16:54 ` Zhang Yanfei
2013-08-23 18:18 ` Yinghai Lu
2013-08-23 18:18 ` Yinghai Lu
2013-08-23 18:25 ` H. Peter Anvin
2013-08-23 20:08 ` Yinghai Lu
2013-08-23 20:30 ` Russ Anderson
2013-08-23 20:48 ` Yinghai Lu
2013-08-23 21:50 ` chen tang
2013-08-23 21:52 ` Moore, Robert
2013-08-23 22:05 ` Yinghai Lu
2013-08-23 22:08 ` Yinghai Lu
2013-08-23 22:40 ` chen tang
2013-08-23 23:04 ` Yinghai Lu
2013-08-24 2:41 ` Russ Anderson
2013-08-23 20:33 ` chen tang
2013-08-23 20:33 ` chen tang
2013-08-23 21:08 ` Yinghai Lu
2013-08-23 21:08 ` Yinghai Lu
2013-08-23 22:27 ` chen tang
2013-08-23 22:27 ` chen tang
2013-08-23 18:29 ` Toshi Kani
2013-08-23 18:29 ` Toshi Kani
2013-08-23 21:37 ` chen tang
2013-08-23 21:37 ` chen tang
2013-08-23 21:52 ` Tejun Heo
2013-08-23 21:52 ` Tejun Heo
2013-08-23 23:56 ` chen tang
2013-08-23 23:56 ` chen tang
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