diff options
| author | Tang Chen <tangchen@cn.fujitsu.com> | 2013-02-22 16:33:37 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-23 17:50:14 -0800 |
| commit | 34b71f1e04fcba578e719e675b4882eeeb2a1f6f (patch) | |
| tree | beafbed8dce82b108e95baa2c2424ee0f3e94701 /Documentation | |
| parent | 4d59a75125d5a4717e57e9fc62c64b3d346e603e (diff) | |
page_alloc: add movable_memmap kernel parameter
Add functions to parse movablemem_map boot option. Since the option
could be specified more then once, all the maps will be stored in the
global variable movablemem_map.map array.
And also, we keep the array in monotonic increasing order by start_pfn.
And merge all overlapped ranges.
[akpm@linux-foundation.org: improve comment]
[akpm@linux-foundation.org: checkpatch fixes]
[akpm@linux-foundation.org: remove unneeded parens]
Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Reviewed-by: Wen Congyang <wency@cn.fujitsu.com>
Tested-by: Lin Feng <linfeng@cn.fujitsu.com>
Cc: Wu Jianguo <wujianguo@huawei.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/kernel-parameters.txt | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 9aa8ff3e54dc..722a74161246 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1640,6 +1640,23 @@ bytes respectively. Such letter suffixes can also be entirely omitted. that the amount of memory usable for all allocations is not too small. + movablemem_map=nn[KMG]@ss[KMG] + [KNL,X86,IA-64,PPC] This parameter is similar to + memmap except it specifies the memory map of + ZONE_MOVABLE. + If more areas are all within one node, then from + lowest ss to the end of the node will be ZONE_MOVABLE. + If an area covers two or more nodes, the area from + ss to the end of the 1st node will be ZONE_MOVABLE, + and all the rest nodes will only have ZONE_MOVABLE. + If memmap is specified at the same time, the + movablemem_map will be limited within the memmap + areas. If kernelcore or movablecore is also specified, + movablemem_map will have higher priority to be + satisfied. So the administrator should be careful that + the amount of movablemem_map areas are not too large. + Otherwise kernel won't have enough memory to start. + MTD_Partition= [MTD] Format: <name>,<region-number>,<size>,<offset> |