Author: avg
Date: Tue Feb 27 14:32:33 2018
New Revision: 330061
URL: https://svnweb.freebsd.org/changeset/base/330061
Log:
MFC r328776: ZFS ARC: restore illumos uses of 'needfree' that were removed in
r325851
Modified:
stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c
Directory Properties:
stable/11/ (props changed)
Modified: stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c
==============================================================================
--- stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c Tue Feb
27 14:29:20 2018 (r330060)
+++ stable/11/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c Tue Feb
27 14:32:33 2018 (r330061)
@@ -4237,6 +4237,7 @@ arc_available_memory(void)
free_memory_reason_t r = FMR_UNKNOWN;
#ifdef _KERNEL
+#ifdef __FreeBSD__
/*
* Cooperate with pagedaemon when it's time for it to scan
* and reclaim some pages.
@@ -4247,7 +4248,15 @@ arc_available_memory(void)
r = FMR_LOTSFREE;
}
-#ifdef illumos
+#else
+ if (needfree > 0) {
+ n = PAGESIZE * (-needfree);
+ if (n < lowest) {
+ lowest = n;
+ r = FMR_NEEDFREE;
+ }
+ }
+
/*
* check that we're out of range of the pageout scanner. It starts to
* schedule paging if freemem is less than lotsfree and needfree.
@@ -4290,7 +4299,7 @@ arc_available_memory(void)
r = FMR_PAGES_PP_MAXIMUM;
}
-#endif /* illumos */
+#endif /* __FreeBSD__ */
#if defined(__i386) || !defined(UMA_MD_SMALL_ALLOC)
/*
* If we're on an i386 platform, it's possible that we'll exhaust the
@@ -4501,6 +4510,11 @@ arc_reclaim_thread(void *dummy __unused)
int64_t to_free =
(arc_c >> arc_shrink_shift) - free_memory;
if (to_free > 0) {
+#ifdef _KERNEL
+#ifdef illumos
+ to_free = MAX(to_free, ptob(needfree));
+#endif
+#endif
arc_shrink(to_free);
}
} else if (free_memory < arc_c >> arc_no_grow_shift) {
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