svn commit: r326974 - head/sys/vm
Konstantin Belousov
kib at FreeBSD.org
Tue Dec 19 10:06:57 UTC 2017
Author: kib
Date: Tue Dec 19 10:06:55 2017
New Revision: 326974
URL: https://svnweb.freebsd.org/changeset/base/326974
Log:
Perform all accesses to uma_reclaim_needed using atomic(9) KPI.
Reviewed by: alc, jhb
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D13534
Modified:
head/sys/vm/uma_core.c
Modified: head/sys/vm/uma_core.c
==============================================================================
--- head/sys/vm/uma_core.c Tue Dec 19 10:05:45 2017 (r326973)
+++ head/sys/vm/uma_core.c Tue Dec 19 10:06:55 2017 (r326974)
@@ -3170,14 +3170,14 @@ uma_reclaim_worker(void *arg __unused)
for (;;) {
sx_xlock(&uma_drain_lock);
- while (uma_reclaim_needed == 0)
+ while (atomic_load_int(&uma_reclaim_needed) == 0)
sx_sleep(uma_reclaim, &uma_drain_lock, PVM, "umarcl",
hz);
sx_xunlock(&uma_drain_lock);
EVENTHANDLER_INVOKE(vm_lowmem, VM_LOW_KMEM);
sx_xlock(&uma_drain_lock);
uma_reclaim_locked(true);
- uma_reclaim_needed = 0;
+ atomic_store_int(&uma_reclaim_needed, 0);
sx_xunlock(&uma_drain_lock);
/* Don't fire more than once per-second. */
pause("umarclslp", hz);
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