On 12/22/2023 11:17 AM, Yonghong Song wrote: > Currently, refill low/high marks are set with the assumption > of normal non-percpu memory allocation. For example, for > an allocation size 256, for non-percpu memory allocation, > low mark is 32 and high mark is 96, resulting in the > batch allocation of 48 elements and the allocated memory > will be 48 * 256 = 12KB for this particular cpu. > Assuming an 128-cpu system, the total memory consumption > across all cpus will be 12K * 128 = 1.5MB memory. > > This might be okay for non-percpu allocation, but may not be > good for percpu allocation, which will consume 1.5MB * 128 = 192MB > memory in the worst case if every cpu has a chance of memory > allocation. > > In practice, percpu allocation is very rare compared to > non-percpu allocation. So let us have smaller low/high marks > which can avoid unnecessary memory consumption. > > Signed-off-by: Yonghong Song <yonghong.song@xxxxxxxxx> Acked-by: Hou Tao <houtao1@xxxxxxxxxx>
