diff options
| author | qiuxishi <[email protected]> | 2012-09-17 14:09:24 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2012-09-17 15:00:38 -0700 |
| commit | f14851af0ebb32745c6c5a2e400aa0549f9d20df (patch) | |
| tree | 861f66b55bafe4a669d29469c24a3535ac1b8e2b /tools/perf/util/trace-event-scripting.c | |
| parent | 0ba8f2d59304dfe69b59c034de723ad80f7ab9ac (diff) | |
memory hotplug: fix section info double registration bug
There may be a bug when registering section info. For example, on my
Itanium platform, the pfn range of node0 includes the other nodes, so
other nodes' section info will be double registered, and memmap's page
count will equal to 3.
node0: start_pfn=0x100, spanned_pfn=0x20fb00, present_pfn=0x7f8a3, => 0x000100-0x20fc00
node1: start_pfn=0x80000, spanned_pfn=0x80000, present_pfn=0x80000, => 0x080000-0x100000
node2: start_pfn=0x100000, spanned_pfn=0x80000, present_pfn=0x80000, => 0x100000-0x180000
node3: start_pfn=0x180000, spanned_pfn=0x80000, present_pfn=0x80000, => 0x180000-0x200000
free_all_bootmem_node()
register_page_bootmem_info_node()
register_page_bootmem_info_section()
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()
[[email protected]: add code comment]
Signed-off-by: Xishi Qiu <[email protected]>
Signed-off-by: Jiang Liu <[email protected]>
Acked-by: Mel Gorman <[email protected]>
Cc: "Luck, Tony" <[email protected]>
Cc: Yasuaki Ishimatsu <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'tools/perf/util/trace-event-scripting.c')
0 files changed, 0 insertions, 0 deletions