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    Subject[PATCH 11/29] lmb: Add find_memory_core_early()
    Date
    According to node range in early_node_map[] with __lmb_find_area
    to find free range.

    Will be used by lmb_find_area_node()

    lmb_find_area_node will be used to find right buffer for NODE_DATA

    Signed-off-by: Yinghai Lu <yinghai@kernel.org>
    ---
    include/linux/mm.h | 2 ++
    mm/page_alloc.c | 29 +++++++++++++++++++++++++++++
    2 files changed, 31 insertions(+), 0 deletions(-)

    diff --git a/include/linux/mm.h b/include/linux/mm.h
    index c8442b6..8070bd8 100644
    --- a/include/linux/mm.h
    +++ b/include/linux/mm.h
    @@ -1159,6 +1159,8 @@ extern void free_bootmem_with_active_regions(int nid,
    unsigned long max_low_pfn);
    int add_from_early_node_map(struct range *range, int az,
    int nr_range, int nid);
    +u64 __init find_memory_core_early(int nid, u64 size, u64 align,
    + u64 goal, u64 limit);
    void *__alloc_memory_core_early(int nodeid, u64 size, u64 align,
    u64 goal, u64 limit);
    typedef int (*work_fn_t)(unsigned long, unsigned long, void *);
    diff --git a/mm/page_alloc.c b/mm/page_alloc.c
    index d03c946..12a74ad 100644
    --- a/mm/page_alloc.c
    +++ b/mm/page_alloc.c
    @@ -21,6 +21,7 @@
    #include <linux/pagemap.h>
    #include <linux/jiffies.h>
    #include <linux/bootmem.h>
    +#include <linux/lmb.h>
    #include <linux/compiler.h>
    #include <linux/kernel.h>
    #include <linux/kmemcheck.h>
    @@ -3393,6 +3394,34 @@ void __init free_bootmem_with_active_regions(int nid,
    }
    }

    +#ifdef CONFIG_HAVE_LMB
    +u64 __init find_memory_core_early(int nid, u64 size, u64 align,
    + u64 goal, u64 limit)
    +{
    + int i;
    +
    + /* Need to go over early_node_map to find out good range for node */
    + for_each_active_range_index_in_nid(i, nid) {
    + u64 addr;
    + u64 ei_start, ei_last;
    +
    + ei_last = early_node_map[i].end_pfn;
    + ei_last <<= PAGE_SHIFT;
    + ei_start = early_node_map[i].start_pfn;
    + ei_start <<= PAGE_SHIFT;
    + addr = __lmb_find_area(ei_start, ei_last,
    + goal, limit, size, align);
    +
    + if (addr == -1ULL)
    + continue;
    +
    + return addr;
    + }
    +
    + return -1ULL;
    +}
    +#endif
    +
    int __init add_from_early_node_map(struct range *range, int az,
    int nr_range, int nid)
    {
    --
    1.6.4.2


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