On Tue, 14 Oct 2025 22:49:44 +0300 Itamar-Dalal <[email protected]> wrote:
> Subject: [PATCH] Add a new test 'migrate.cow_after_fork' that verifies > correct RMAP handling of Copy-On-Write pages after fork(). Before a write, > parent and child share the same PFN; after a write, the child’s PFN differs, > confirming proper COW duplication. > Date: Tue, 14 Oct 2025 22:49:44 +0300 > X-Mailer: git-send-email 2.34.1 > > Signed-off-by: Itamar-Dalal <[email protected]> > --- > tools/testing/selftests/mm/rmap.c | 45 ++++++++++++++++++++++++++++++- > 1 file changed, 44 insertions(+), 1 deletion(-) OK, somehow your changelog was pasted into the email Subject, so please resend. Please prefix the Subject: with something which tells readers what part of the kernel is affected. eg, : : Subject: selfstests/mm/rmap: verify correct RMAP handling of COW pages after fork() : Then enter the details in the changelog body, eg: : : Before a write, parent and child share the same PFN. After a write, the : child’s PFN differs. Check this to confirm proper COW duplication. :
