freebsd-dev/sys/cddl/contrib/opensolaris
Alexander Motin 1fcdb58634 Do not ignore arc_adjust() return value.
This covers scenario when ARC may not shrink as fast as it could:
1. arc_size < arc_c and arc_adjust() does not evict anything, returning
   zero to arc_reclaim_thread();
2. arc_available_memory() reports memory pressure, which can not be
   satisfied by arc_kmem_reap_now();
3. arc_shrink() reduces arc_c and calls arc_adjust(), return of which is
   ignored;
4. even if the last arc_adjust() could not satisfy arc_size < arc_c,
   arc_reclaim_thread() will still go to sleep, since the first one
   returned zero.

Reviewed by:	allanjude, markj, sef
MFC after:	2 weeks
Sponsored by:	iXsystems, Inc.
Differential Revision:	https://reviews.freebsd.org/D17927
2018-11-10 01:58:37 +00:00
..
common MFV/ZoL: Implement large_dnode pool feature 2018-08-12 00:45:53 +00:00
uts Do not ignore arc_adjust() return value. 2018-11-10 01:58:37 +00:00
OPENSOLARIS.LICENSE