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D16620.1793671615.diff
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Index: amd64/include/vmparam.h
===================================================================
--- amd64/include/vmparam.h
+++ amd64/include/vmparam.h
@@ -97,9 +97,10 @@
* the pool from which physical pages for page tables and small UMA
* objects are allocated.
*/
-#define VM_NFREEPOOL 2
+#define VM_NFREEPOOL 3
#define VM_FREEPOOL_DEFAULT 0
#define VM_FREEPOOL_DIRECT 1
+#define VM_FREEPOOL_NOFREE 2
/*
* Create up to three free page lists: VM_FREELIST_DMA32 is for physical pages
Index: sys/malloc.h
===================================================================
--- sys/malloc.h
+++ sys/malloc.h
@@ -60,6 +60,7 @@
#define M_FIRSTFIT 0x1000 /* Only for vmem, fast fit. */
#define M_BESTFIT 0x2000 /* Only for vmem, low fragmentation. */
#define M_EXEC 0x4000 /* allocate executable space. */
+#define M_N0FREE 0x8000
#define M_MAGIC 877983977 /* time when first defined :-) */
Index: vm/uma_core.c
===================================================================
--- vm/uma_core.c
+++ vm/uma_core.c
@@ -1039,6 +1039,9 @@
if (keg->uk_flags & UMA_ZONE_NODUMP)
wait |= M_NODUMP;
+ if (keg->uk_flags & UMA_ZONE_NOFREE)
+ wait |= M_N0FREE;
+
/* zone is passed for legacy reasons. */
mem = allocf(zone, size, domain, &flags, wait);
if (mem == NULL) {
Index: vm/vm_page.h
===================================================================
--- vm/vm_page.h
+++ vm/vm_page.h
@@ -464,6 +464,7 @@
#define VM_ALLOC_ZERO 0x0040 /* (acfgp) Allocate a prezeroed page */
#define VM_ALLOC_NOOBJ 0x0100 /* (acg) No associated object */
#define VM_ALLOC_NOBUSY 0x0200 /* (acgp) Do not excl busy the page */
+#define VM_ALLOC_NOFREE 0x0400
#define VM_ALLOC_IGN_SBUSY 0x1000 /* (gp) Ignore shared busy flag */
#define VM_ALLOC_NODUMP 0x2000 /* (ag) don't include in dump */
#define VM_ALLOC_SBUSY 0x4000 /* (acgp) Shared busy the page */
@@ -486,6 +487,8 @@
pflags |= VM_ALLOC_ZERO;
if ((malloc_flags & M_NODUMP) != 0)
pflags |= VM_ALLOC_NODUMP;
+ if ((malloc_flags & M_N0FREE) != 0)
+ pflags |= VM_ALLOC_NOFREE;
if ((malloc_flags & M_NOWAIT))
pflags |= VM_ALLOC_NOWAIT;
if ((malloc_flags & M_WAITOK))
Index: vm/vm_page.c
===================================================================
--- vm/vm_page.c
+++ vm/vm_page.c
@@ -1850,7 +1850,7 @@
*/
vm_domain_free_lock(vmd);
m = vm_phys_alloc_pages(domain, object != NULL ?
- VM_FREEPOOL_DEFAULT : VM_FREEPOOL_DIRECT, 0);
+ VM_FREEPOOL_DEFAULT : ((req & VM_ALLOC_NOFREE) ? VM_FREEPOOL_NOFREE : VM_FREEPOOL_DIRECT), 0);
vm_domain_free_unlock(vmd);
if (m == NULL) {
vm_domain_freecnt_inc(vmd, 1);

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