Re: [PATCH v4 0/9] introduce VM_MAYBE_GUARD and make it sticky

On Tue, 18 Nov 2025 10:17:42 +0000 Lorenzo Stoakes lorenzo.stoakes@oracle.com wrote:

Currently, guard regions are not visible to users except through /proc/$pid/pagemap, with no explicit visibility at the VMA level.

This makes the feature less useful, as it isn't entirely apparent which VMAs may have these entries present, especially when performing actions which walk through memory regions such as those performed by CRIU.

This series addresses this issue by introducing the VM_MAYBE_GUARD flag which fulfils this role, updating the smaps logic to display an entry for these.

I updated mm-unstable to this version.