vgsp-sema: session boundary is a client change, not the last channel closing (ISSUE-0002)

r79 regression from keeping the CeUtils scrubber channel registered
(client-scoped deletion): the session flush trigger required EVERY
channel to close, and the scrubber never closes, so the per-session
discovery reset never ran and the next client inherited the previous
session's map/pins (the r9 class; the first client of r79 wedged the
guest on an rwsem with no output).

The session is now keyed by owning client: channel_add records
svc_sess_client and requests the flush when a channel of a DIFFERENT
client registers while the previous session is live (then waits for it,
exactly like a pending flush); channel_del's flush trigger counts only
channels of the current session client, so persistent kernel/GPU-global
channels (the scrubber) no longer keep a dead session open.

0 files changed, 0 insertions, 0 deletions