From: "H. Peter Anvin" <hpa@kernel.org>
To: "Zheng, Shaohui" <shaohui.zheng@intel.com>
Cc: "linux-mm@kvack.org" <linux-mm@kvack.org>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"ak@linux.intel.com" <ak@linux.intel.com>,
"y-goto@jp.fujitsu.com" <y-goto@jp.fujitsu.com>,
Dave Hansen <haveblue@us.ibm.com>,
"Wu, Fengguang" <fengguang.wu@intel.com>,
"x86@kernel.org" <x86@kernel.org>
Subject: Re: [PATCH - resend] Memory-Hotplug: Fix the bug on interface /dev/mem for 64-bit kernel(v1)
Date: Thu, 07 Jan 2010 21:02:39 -0800 [thread overview]
Message-ID: <4B46BC6F.5060607@kernel.org> (raw)
In-Reply-To: <DA586906BA1FFC4384FCFD6429ECE86031560BAC@shzsmsx502.ccr.corp.intel.com>
On 01/07/2010 07:32 PM, Zheng, Shaohui wrote:
> Resend the patch to the mailing-list, the original patch URL is
> http://patchwork.kernel.org/patch/69075/, it is not accepted without comments,
> sent it again to review.
>
> Memory-Hotplug: Fix the bug on interface /dev/mem for 64-bit kernel
>
> The new added memory can not be access by interface /dev/mem, because we do not
> update the variable high_memory. This patch add a new e820 entry in e820 table,
> and update max_pfn, max_low_pfn and high_memory.
>
> We add a function update_pfn in file arch/x86/mm/init.c to udpate these
> varibles. Memory hotplug does not make sense on 32-bit kernel, so we did not
> concern it in this function.
>
Memory hotplug makes sense on 32-bit kernels, at least in virtual
environments.
-hpa
WARNING: multiple messages have this Message-ID (diff)
From: "H. Peter Anvin" <hpa@kernel.org>
To: "Zheng, Shaohui" <shaohui.zheng@intel.com>
Cc: "linux-mm@kvack.org" <linux-mm@kvack.org>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"ak@linux.intel.com" <ak@linux.intel.com>,
"y-goto@jp.fujitsu.com" <y-goto@jp.fujitsu.com>,
Dave Hansen <haveblue@us.ibm.com>,
"Wu, Fengguang" <fengguang.wu@intel.com>,
"x86@kernel.org" <x86@kernel.org>
Subject: Re: [PATCH - resend] Memory-Hotplug: Fix the bug on interface /dev/mem for 64-bit kernel(v1)
Date: Thu, 07 Jan 2010 21:02:39 -0800 [thread overview]
Message-ID: <4B46BC6F.5060607@kernel.org> (raw)
In-Reply-To: <DA586906BA1FFC4384FCFD6429ECE86031560BAC@shzsmsx502.ccr.corp.intel.com>
On 01/07/2010 07:32 PM, Zheng, Shaohui wrote:
> Resend the patch to the mailing-list, the original patch URL is
> http://patchwork.kernel.org/patch/69075/, it is not accepted without comments,
> sent it again to review.
>
> Memory-Hotplug: Fix the bug on interface /dev/mem for 64-bit kernel
>
> The new added memory can not be access by interface /dev/mem, because we do not
> update the variable high_memory. This patch add a new e820 entry in e820 table,
> and update max_pfn, max_low_pfn and high_memory.
>
> We add a function update_pfn in file arch/x86/mm/init.c to udpate these
> varibles. Memory hotplug does not make sense on 32-bit kernel, so we did not
> concern it in this function.
>
Memory hotplug makes sense on 32-bit kernels, at least in virtual
environments.
-hpa
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next prev parent reply other threads:[~2010-01-08 5:10 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-08 3:32 [PATCH - resend] Memory-Hotplug: Fix the bug on interface /dev/mem for 64-bit kernel(v1) Zheng, Shaohui
2010-01-08 5:02 ` H. Peter Anvin [this message]
2010-01-08 5:02 ` H. Peter Anvin
2010-01-08 5:18 ` Zheng, Shaohui
2010-01-08 5:18 ` Zheng, Shaohui
2010-01-08 19:47 ` Andi Kleen
2010-01-08 19:47 ` Andi Kleen
2010-01-12 0:58 ` KAMEZAWA Hiroyuki
2010-01-12 0:58 ` KAMEZAWA Hiroyuki
2010-01-08 12:48 ` Wu Fengguang
2010-01-08 12:48 ` Wu Fengguang
2010-01-11 2:20 ` Zheng, Shaohui
2010-01-11 2:20 ` Zheng, Shaohui
2010-01-11 12:43 ` Wu Fengguang
2010-01-11 12:43 ` Wu Fengguang
2010-01-12 0:30 ` KAMEZAWA Hiroyuki
2010-01-12 0:30 ` KAMEZAWA Hiroyuki
2010-01-12 1:38 ` Andi Kleen
2010-01-12 1:38 ` Andi Kleen
2010-01-12 1:39 ` KAMEZAWA Hiroyuki
2010-01-12 1:39 ` KAMEZAWA Hiroyuki
2010-01-12 1:50 ` KAMEZAWA Hiroyuki
2010-01-12 1:50 ` KAMEZAWA Hiroyuki
2010-01-12 2:45 ` Wu Fengguang
2010-01-12 2:45 ` Wu Fengguang
2010-01-12 2:33 ` Wu Fengguang
2010-01-12 2:33 ` Wu Fengguang
2010-01-12 2:39 ` KAMEZAWA Hiroyuki
2010-01-12 2:39 ` KAMEZAWA Hiroyuki
2010-01-12 13:35 ` Wu Fengguang
2010-01-12 13:35 ` Wu Fengguang
2010-01-12 23:01 ` Yinghai Lu
2010-01-12 23:01 ` Yinghai Lu
2010-01-13 2:29 ` Wu Fengguang
2010-01-13 2:29 ` Wu Fengguang
2010-01-12 5:45 ` Zheng, Shaohui
2010-01-12 5:45 ` Zheng, Shaohui
2010-01-12 5:51 ` Zheng, Shaohui
2010-01-12 5:51 ` Zheng, Shaohui
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