pNFS/flexfiles: Fix layoutstat periodic reporting
commit
1c8d477a77e2d1d3504419e7f2e02e6422becf9a upstream.
Putting the periodicity timer in the mirror instances is causing
non-scalable reporting behaviour and missed reporting intervals.
When you recall layouts and/or implement client side mirroring, it
leads to consecutive reports with only a few ms between RPC calls.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Fixes: d0379a5d066a9 ("pNFS/flexfiles: Support server-supplied...")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>