On Fri, Aug 17, 2012 at 03:52:47PM +0800, qiuxishi wrote: > From: Xishi Qiu <qiuxishi@xxxxxxxxxx> > > 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@xxxxxxxxxx> > --- > 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> -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>