Re: [PATCH v1] Revert "mm: kmemleak: alloc gray object for reserved region with direct map"

On Tue, Jan 24, 2023 at 03:02:54PM -0800, Isaac J. Manjarres wrote:

This reverts commit 972fa3a7c17c9d60212e32ecc0205dc585b1e769.

Kmemleak operates by periodically scanning memory regions for pointers to allocated memory blocks to determine if they are leaked or not. However, reserved memory regions can be used for DMA transactions between a device and a CPU, and thus, wouldn't contain pointers to allocated memory blocks, making them inappropriate for kmemleak to scan. Thus, revert this commit.

Cc: stable@vger.kernel.org # 5.17+ Cc: Calvin Zhang calvinzhang.cool@gmail.com Signed-off-by: Isaac J. Manjarres isaacmanjarres@google.com

Acked-by: Catalin Marinas catalin.marinas@arm.com