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| author | Yunfeng Ye <yeyunfeng@huawei.com> | 2019-12-01 04:56:27 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-12-01 23:59:08 +0300 |
| commit | 0ac398b171aacd0f0c132d989ec4efb5de94f34a (patch) | |
| tree | f5c500393edb2308a7cf8e5bff3b63ccb79d290b /mm/sparse.c | |
| parent | 95830666be2aef81a2963135822ab92f4902a06b (diff) | |
| download | linux-0ac398b171aacd0f0c132d989ec4efb5de94f34a.tar.xz | |
mm: support memblock alloc on the exact node for sparse_buffer_init()
sparse_buffer_init() use memblock_alloc_try_nid_raw() to allocate memory
for page management structure, if memory allocation fails from specified
node, it will fall back to allocate from other nodes.
Normally, the page management structure will not exceed 2% of the total
memory, but a large continuous block of allocation is needed. In most
cases, memory allocation from the specified node will succeed, but a
node memory become highly fragmented will fail. we expect to allocate
memory base section rather than by allocating a large block of memory
from other NUMA nodes
Add memblock_alloc_exact_nid_raw() for this situation, which allocate
boot memory block on the exact node. If a large contiguous block memory
allocate fail in sparse_buffer_init(), it will fall back to allocate
small block memory base section.
Link: http://lkml.kernel.org/r/66755ea7-ab10-8882-36fd-3e02b03775d5@huawei.com
Signed-off-by: Yunfeng Ye <yeyunfeng@huawei.com>
Reviewed-by: Mike Rapoport <rppt@linux.ibm.com>
Cc: Wei Yang <richardw.yang@linux.intel.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Qian Cai <cai@lca.pw>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/sparse.c')
| -rw-r--r-- | mm/sparse.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/sparse.c b/mm/sparse.c index 8526d3bf1e4e..b20ab7cdac86 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -486,7 +486,7 @@ static void __init sparse_buffer_init(unsigned long size, int nid) * and we want it to be properly aligned to the section size - this is * especially the case for VMEMMAP which maps memmap to PMDs */ - sparsemap_buf = memblock_alloc_try_nid_raw(size, section_map_size(), + sparsemap_buf = memblock_alloc_exact_nid_raw(size, section_map_size(), addr, MEMBLOCK_ALLOC_ACCESSIBLE, nid); sparsemap_buf_end = sparsemap_buf + size; } |