On Thu, Feb 12, 2026 at 01:58:11PM -0800, T.J. Mercier wrote: > This series adds support for IN_DELETE_SELF and IN_IGNORED inotify > events to kernfs files. > > Currently, kernfs (used by cgroup and others) supports IN_MODIFY events > but fails to notify watchers when the file is removed (e.g. during > cgroup destruction). This forces userspace monitors to maintain resource > intensive side-channels like pidfds, procfs polling, or redundant > directory watches to detect when a cgroup dies and a watched file is > removed. > > By generating IN_DELETE_SELF events on destruction, we allow watchers to > rely on a single watch descriptor for the entire lifecycle of the > monitored file, reducing resource usage (file descriptors, CPU cycles) > and complexity in userspace. > > The series is structured as follows: > Patch 1 refactors kernfs_elem_attr to support arbitrary event types. > Patch 2 implements the logic to generate DELETE_SELF and IGNORED events > on file removal. > Patch 3 adds selftests to verify the new behavior.
The patchset looks good to me. Acked-by: Tejun Heo <[email protected]> Thanks. -- tejun
