From: mav <mav@FreeBSD.org>
Date: Thu, 15 Dec 2016 08:03:16 +0000 (+0000)
Subject: Revert r310023 for now.
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=d828ed76b57f48308ee79ca8d7ca798792a51edf;p=people%2Froyger%2Ffreebsd.git

Revert r310023 for now.

After another look my new variable mapping was not exactly right.
---

diff --git a/sys/cddl/compat/opensolaris/sys/kmem.h b/sys/cddl/compat/opensolaris/sys/kmem.h
index 0b7e16c6766f..c0e9760d57b0 100644
--- a/sys/cddl/compat/opensolaris/sys/kmem.h
+++ b/sys/cddl/compat/opensolaris/sys/kmem.h
@@ -37,7 +37,6 @@
 #include <vm/uma.h>
 #include <vm/vm.h>
 #include <vm/vm_extern.h>
-#include <vm/vm_pageout.h>
 
 MALLOC_DECLARE(M_SOLARIS);
 
@@ -78,10 +77,8 @@ void kmem_reap(void);
 int kmem_debugging(void);
 void *calloc(size_t n, size_t s);
 
-#define	freemem				(long)vm_cnt.v_free_count
-#define	desfree				(long)vm_cnt.v_free_target
-#define	minfree				(long)vm_cnt.v_free_min
-#define	needfree			(long)vm_pageout_deficit
+#define	freemem				vm_cnt.v_free_count
+#define	minfree				vm_cnt.v_free_min
 #define	heap_arena			kmem_arena
 #define	kmem_alloc(size, kmflags)	zfs_kmem_alloc((size), (kmflags))
 #define	kmem_zalloc(size, kmflags)	zfs_kmem_alloc((size), (kmflags) | M_ZERO)
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c
index 49c52ed3e6d0..b41b746d3687 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c
@@ -357,7 +357,6 @@ int zfs_arc_shrink_shift = 0;
 int zfs_arc_p_min_shift = 0;
 uint64_t zfs_arc_average_blocksize = 8 * 1024; /* 8KB */
 u_int zfs_arc_free_target = 0;
-#define	lotsfree	zfs_arc_free_target
 
 /* Absolute min for arc min / max is 16MB. */
 static uint64_t arc_abs_min = 16 << 20;
@@ -3828,6 +3827,8 @@ arc_shrink(int64_t to_free)
 	}
 }
 
+static long needfree = 0;
+
 typedef enum free_memory_reason_t {
 	FMR_UNKNOWN,
 	FMR_NEEDFREE,
@@ -3873,6 +3874,17 @@ arc_available_memory(void)
 		}
 	}
 
+	/*
+	 * Cooperate with pagedaemon when it's time for it to scan
+	 * and reclaim some pages.
+	 */
+	n = PAGESIZE * ((int64_t)freemem - zfs_arc_free_target);
+	if (n < lowest) {
+		lowest = n;
+		r = FMR_LOTSFREE;
+	}
+
+#ifdef illumos
 	/*
 	 * check that we're out of range of the pageout scanner.  It starts to
 	 * schedule paging if freemem is less than lotsfree and needfree.
@@ -3886,7 +3898,6 @@ arc_available_memory(void)
 		r = FMR_LOTSFREE;
 	}
 
-#ifdef illumos
 	/*
 	 * check to make sure that swapfs has enough space so that anon
 	 * reservations can still succeed. anon_resvmem() checks that the
@@ -4143,6 +4154,9 @@ arc_reclaim_thread(void *dummy __unused)
 		 * infinite loop.
 		 */
 		if (arc_size <= arc_c || evicted == 0) {
+#ifdef _KERNEL
+			needfree = 0;
+#endif
 			/*
 			 * We're either no longer overflowing, or we
 			 * can't evict anything more, so we should wake
@@ -5869,6 +5883,8 @@ arc_lowmem(void *arg __unused, int howto __unused)
 {
 
 	mutex_enter(&arc_reclaim_lock);
+	/* XXX: Memory deficit should be passed as argument. */
+	needfree = btoc(arc_c >> arc_shrink_shift);
 	DTRACE_PROBE(arc__needfree);
 	cv_signal(&arc_reclaim_thread_cv);