Commit 5d62bacc authored by Zhen Lei's avatar Zhen Lei Committed by Joerg Roedel
Browse files

iommu/iova: Optimize iova_magazine_alloc() 



Only the member 'size' needs to be initialized to 0. Clearing the array
pfns[], which is about 1 KiB in size, not only wastes time, but also
causes cache pollution.

Acked-by: default avatarRobin Murphy <robin.murphy@arm.com>
Signed-off-by: default avatarZhen Lei <thunder.leizhen@huawei.com>
Link: https://lore.kernel.org/r/20230421072422.869-1-thunder.leizhen@huawei.com


Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 44c026a7

drivers/iommu/iova.c

+7 −1
Original line number Diff line number Diff line
@@ -647,7 +647,13 @@ struct iova_rcache { 


static struct iova_magazine *iova_magazine_alloc(gfp_t flags)

{

	return kzalloc(sizeof(struct iova_magazine), flags);

	struct iova_magazine *mag;



	mag = kmalloc(sizeof(*mag), flags);

	if (mag)

		mag->size = 0;



	return mag;

}



static void iova_magazine_free(struct iova_magazine *mag)