On Wed, Sep 17, 2025 at 3:58 AM 'David Hildenbrand' via kernel-team <kernel-t...@android.com> wrote: > > > + * test_suite_setup - Set up the VMA layout for VMA count testing. > > + * > > + * Sets up the following VMA layout: > > + * > > + * +----- base_addr > > + * | > > + * V > > + * > > +--------------+----------------------+--------------+----------------+--------------+----------------+--------------+-----+----------------+--------------+ > > + * | Guard Page | | Guard Page | Extra Map 1 | > > Unmapped Gap | Extra Map 2 | Unmapped Gap | ... | Extra Map N | > > Unmapped Gap | > > + * | (unmapped) | TEST_AREA | (unmapped) | (mapped page) | > > (1 page) | (mapped page) | (1 page) | ... | (mapped page) | (1 > > page) | > > + * | (1 page) | (unmapped, 3 pages) | (1 page) | (1 page) | > > | (1 page) | | | (1 page) | > > | > > + * > > +--------------+----------------------+--------------+----------------+--------------+----------------+--------------+-----+----------------+--------------+ > > + * ^ ^ ^ ^ > > ^ > > + * | | | | > > | > > + * +--GUARD_SIZE--+ | +-- EXTRA_MAPS > > points here Sufficient EXTRA_MAPS to ---+ > > + * (PAGE_SIZE) | | > > reach MAX_VMA_COUNT > > + * | | > > + * +--- TEST_AREA_SIZE ---+ > > + * | (3 * PAGE_SIZE) | > > + * ^ > > + * | > > + * +-- TEST_AREA starts here > > + * > > >
Hi David, Thanks for the reviews. > Just wondering if we could find a different name than "guard page" here, > to not confuse stuff with guard ptes > > Will the current "guard page" we a valid vma or just a hole? It's a hole to prevent coincidental merging of adjacent VMAs. I can rename it to HOLE in the next revision. Thanks, Kalesh > > -- > Cheers > > David / dhildenb > > To unsubscribe from this group and stop receiving emails from it, send an > email to kernel-team+unsubscr...@android.com. >
