Hi Eugeniu, Spyridon, Do you have a consumer program for USB notification events? I'm would like to get my general notification queue patches upstream in this merge window, but it appears that Linus would like there to be userspace consumers first. Greg pointed me at your patch: https://lore.kernel.org/lkml/20190605090556.17792-1-erosca@xxxxxxxxxxxxxx/ My latest patch set is here: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/log/?h=notifications-pipe-core This provides access to keyring, usb and block device notifications. Thanks, David