On Mon, Mar 31, 2025 at 4:26 AM Lorenzo Stoakes <lorenzo.stoakes@xxxxxxxxxx> wrote: > > On Mon, Mar 24, 2025 at 06:53:25AM +0000, Andrei Vagin wrote: > > Introduce the PAGE_IS_GUARD flag in the PAGEMAP_SCAN ioctl to expose > > information about guard regions. This allows userspace tools, such as > > CRIU, to detect and handle guard regions. > > > > Currently, CRIU utilizes PAGEMAP_SCAN as a more efficient alternative to > > parsing /proc/pid/pagemap. Without this change, guard regions are > > incorrectly reported as swap-anon regions, leading CRIU to attempt > > dumping them and subsequently failing. > > > > This series should be applied on top of "[PATCH 0/2] fs/proc/task_mmu: > > add guard region bit to pagemap": > > https://lore.kernel.org/all/2025031926-engraved-footer-3e9b@gregkh/T/ > > > > The series includes updates to the documentation and selftests to > > reflect the new functionality. > > > > v2: > > - sync linux/fs.h with the kernel sources > > - address comments from Lorenzo and David. > > Thanks, sorry for delay, LSF/MM/BPF is why :) Yep, I know. I hope it was productive. You mentioned in another thread that you are going to handle compatibility for the older kernel. Let me know if I can help with anything. Thanks for your cooperation.
