Re: + mm-mremap-prevent-racing-change-of-old-pmd-type.patch added to mm-hotfixes-unstable branch

Hi!

On Fri, Oct 4, 2024 at 6:51 PM Marek Szyprowski m.szyprowski@samsung.com wrote:

This patch landed in today's linux-next as commit 46c1b3279220 ("mm/mremap: prevent racing change of old pmd type"). In my tests I found that it introduces a lockdep warning about possible circular locking dependency on ARM64 machines. Reverting $subject together with commits a2fbe16f45a8 ("mm: mremap: move_ptes() use pte_offset_map_rw_nolock()") and 46c1b3279220 ("mm/mremap: prevent racing change of old pmd type") on top of next-20241004 fixes this problem.

Thanks for the report; that patch has now been removed, and a different approach (https://lore.kernel.org/all/20241007-move_normal_pmd-vs-collapse-fix-2-v1-1-...) will probably be used instead.