Commit 21ddfd38 authored Mar 28, 2014 by Jianyu Zhan Committed by Tejun Heo Mar 29, 2014

percpu: renew the max_contig if we merge the head and previous block



During pcpu_alloc_area(), we might merge the current head with the
previous block. Since we have calculated the max_contig using the
size of previous block before we skip it, and now we update the size
of previous block, so we should renew the max_contig.

Signed-off-by: Jianyu Zhan <nasa4836@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

parent 2f69fa82

mm/percpu.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -473,9 +473,11 @@ static int pcpu_alloc_area(struct pcpu_chunk *chunk, int size, int align)
		* uncommon for percpu allocations.
		*/
		if (head && (head < sizeof(int) \|\| !(p[-1] & 1))) {
		*p = off += head;
		if (p[-1] & 1)
		chunk->free_size -= head;
		*p = off += head;
		else
		max_contig = max(*p - p[-1], max_contig);
		this_size -= head;
		head = 0;
		}