lkml.org 
[lkml]   [2012]   [Nov]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v2 5/5] page_alloc: Bootmem limit with movablecore_map
On 2012-11-23 18:44, Tang Chen wrote:
> This patch make sure bootmem will not allocate memory from areas that
> may be ZONE_MOVABLE. The map info is from movablecore_map boot option.
>
> 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>
> ---
> include/linux/memblock.h | 1 +
> mm/memblock.c | 15 ++++++++++++++-
> 2 files changed, 15 insertions(+), 1 deletions(-)
>
> diff --git a/include/linux/memblock.h b/include/linux/memblock.h
> index d452ee1..6e25597 100644
> --- a/include/linux/memblock.h
> +++ b/include/linux/memblock.h
> @@ -42,6 +42,7 @@ struct memblock {
>
> extern struct memblock memblock;
> extern int memblock_debug;
> +extern struct movablecore_map movablecore_map;
>
> #define memblock_dbg(fmt, ...) \
> if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
> diff --git a/mm/memblock.c b/mm/memblock.c
> index 6259055..33b3b4d 100644
> --- a/mm/memblock.c
> +++ b/mm/memblock.c
> @@ -101,6 +101,7 @@ phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t start,
> {
> phys_addr_t this_start, this_end, cand;
> u64 i;
> + int curr = movablecore_map.nr_map - 1;
>
> /* pump up @end */
> if (end == MEMBLOCK_ALLOC_ACCESSIBLE)
> @@ -114,13 +115,25 @@ phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t start,
> this_start = clamp(this_start, start, end);
> this_end = clamp(this_end, start, end);
>
> - if (this_end < size)
> +restart:
> + if (this_end <= this_start || this_end < size)
> continue;
>
> + for (; curr >= 0; curr--) {
> + if (movablecore_map.map[curr].start < this_end)

movablecore_map[curr].start should be movablecore_map[curr].start << PAGE_SHIFT.
May be you can change movablecore_map[].start/end to movablecore_map[].start_pfn/end_pfn
to avoid confusion.

> + break;
> + }
> +
> cand = round_down(this_end - size, align);
> + if (curr >= 0 && cand < movablecore_map.map[curr].end) {
> + this_end = movablecore_map.map[curr].start;

Ditto.

> + goto restart;
> + }
> +
> if (cand >= this_start)
> return cand;
> }
> +
> return 0;
> }
>
>



\
 
 \ /
  Last update: 2012-11-26 15:01    [W:0.417 / U:0.788 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site