On Thu, Jun 06, 2019 at 10:41:59AM +0100, David Howells wrote: > > Hi Al, > > Here's a set of patches to add a general variable-length notification queue > concept and to add sources of events for: > > (1) Mount topology events, such as mounting, unmounting, mount expiry, > mount reconfiguration. > > (2) Superblock events, such as R/W<->R/O changes, quota overrun and I/O > errors (not complete yet). > > (3) Key/keyring events, such as creating, linking and removal of keys. > > (4) General device events (single common queue) including: > > - Block layer events, such as device errors > > - USB subsystem events, such as device/bus attach/remove, device > reset, device errors. > > One of the reasons for this is so that we can remove the issue of processes > having to repeatedly and regularly scan /proc/mounts, which has proven to > be a system performance problem. To further aid this, the fsinfo() syscall > on which this patch series depends, provides a way to access superblock and > mount information in binary form without the need to parse /proc/mounts. > > > LSM support is included, but controversial: Apart from the LSM/security controversy here the general direction of this patchset is pretty well received it seems. Imho, having a notification mechanism like this is a very good thing for userspace. So would be great if there'd be a consensus on the LSM bits. Christian
