From 0a313a998adbae19c1309f80a3ad79107fff7c4e Mon Sep 17 00:00:00 2001 From: Xishi Qiu Date: Tue, 9 Sep 2014 14:50:46 -0700 Subject: mem-hotplug: let memblock skip the hotpluggable memory regions in __next_mem_range() Let memblock skip the hotpluggable memory regions in __next_mem_range(), it is used to to prevent memblock from allocating hotpluggable memory for the kernel at early time. The code is the same as __next_mem_range_rev(). Clear hotpluggable flag before releasing free pages to the buddy allocator. If we don't clear hotpluggable flag in free_low_memory_core_early(), the memory which marked hotpluggable flag will not free to buddy allocator. Because __next_mem_range() will skip them. free_low_memory_core_early for_each_free_mem_range for_each_mem_range __next_mem_range [akpm@linux-foundation.org: fix warning] Signed-off-by: Xishi Qiu Cc: Tejun Heo Cc: Tang Chen Cc: Zhang Yanfei Cc: Wen Congyang Cc: "Rafael J. Wysocki" Cc: "H. Peter Anvin" Cc: Wu Fengguang Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/nobootmem.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'mm/nobootmem.c') diff --git a/mm/nobootmem.c b/mm/nobootmem.c index 7ed58602e71b..7c7ab32ee503 100644 --- a/mm/nobootmem.c +++ b/mm/nobootmem.c @@ -119,6 +119,8 @@ static unsigned long __init free_low_memory_core_early(void) phys_addr_t start, end; u64 i; + memblock_clear_hotplug(0, -1); + for_each_free_mem_range(i, NUMA_NO_NODE, &start, &end, NULL) count += __free_memory_core(start, end); -- cgit v1.2.3-70-g09d2