lkml.org 
[lkml]   [2012]   [Aug]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] memory hotplug: avoid double registration on ia64 platform
On Fri, Aug 17, 2012 at 03:52:47PM +0800, qiuxishi wrote:
> From: Xishi Qiu <qiuxishi@huawei.com>
>
> Hi all,
> There may be have a bug when register section info. For example, on
> an Itanium platform, the pfn range of node0 includes the other nodes.
> So when hot remove memory, we can't free the memmap's page because
> page_count() is 2 after put_page_bootmem().
>
> sparse_remove_one_section()->free_section_usemap()->free_map_bootmem()
> ->put_page_bootmem()
>
> pgdat0: start_pfn=0x100, spanned_pfn=0x20fb00, present_pfn=0x7f8a3, => 0x100-0x20fc00
> pgdat1: start_pfn=0x80000, spanned_pfn=0x80000, present_pfn=0x80000, => 0x80000-0x100000
> pgdat2: start_pfn=0x100000, spanned_pfn=0x80000, present_pfn=0x80000, => 0x100000-0x180000
> pgdat3: start_pfn=0x180000, spanned_pfn=0x80000, present_pfn=0x80000, => 0x180000-0x200000
>
>
> Signed-off-by: Xishi Qiu <qiuxishi@huawei.com>
> ---
> mm/memory_hotplug.c | 10 ++++------
> 1 files changed, 4 insertions(+), 6 deletions(-)

<formletter>

This is not the correct way to submit patches for inclusion in the
stable kernel tree. Please read Documentation/stable_kernel_rules.txt
for how to do this properly.

</formletter>


\
 
 \ /
  Last update: 2012-08-17 16:01    [W:0.032 / U:0.240 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site