tree a13a68e25b6b7fb3b8e505ab330539691a84a473
parent a721035477fb5fb8abc738fbe410b07c12af3dc5
author NeilBrown <neilb@suse.de> 1646610104 +1100
committer Trond Myklebust <trond.myklebust@hammerspace.com> 1647190775 -0400

SUNRPC: remove scheduling boost for "SWAPPER" tasks.

Currently, tasks marked as "swapper" tasks get put to the front of
non-priority rpc_queues, and are sorted earlier than non-swapper tasks on
the transport's ->xmit_queue.

This is pointless as currently *all* tasks for a mount that has swap
enabled on *any* file are marked as "swapper" tasks.  So the net result
is that the non-priority rpc_queues are reverse-ordered (LIFO).

This scheduling boost is not necessary to avoid deadlocks, and hurts
fairness, so remove it.  If there were a need to expedite some requests,
the tk_priority mechanism is a more appropriate tool.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>