The patch titled
optional ZONE_DMA: optional ZONE_DMA in the VM
has been added to the -mm tree. Its filename is
optional-zone_dma-in-the-vm.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: optional ZONE_DMA: optional ZONE_DMA in the VM
From: Christoph Lameter <clameter@xxxxxxx>
Make ZONE_DMA optional in core code.
- ifdef all code for ZONE_DMA and related definitions following the example
for ZONE_DMA32 and ZONE_HIGHMEM.
- Without ZONE_DMA, ZONE_HIGHMEM and ZONE_DMA32 we get to a ZONES_SHIFT of
0.
- Modify the VM statistics to work correctly without a DMA zone.
- Modify slab to not create DMA slabs if there is no ZONE_DMA.
Signed-off-by: Christoph Lameter <clameter@xxxxxxx>
Cc: Andi Kleen <ak@xxxxxxx>
Cc: "Luck, Tony" <tony.luck@xxxxxxxxx>
Cc: Kyle McMartin <kyle@xxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxx>
Cc: James Bottomley <James.Bottomley@xxxxxxxxxxxx>
Cc: Paul Mundt <lethal@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
include/linux/gfp.h | 2 ++
include/linux/mmzone.h | 10 ++++++++++
include/linux/slab.h | 4 ++++
include/linux/vmstat.h | 17 +++++++++++++----
mm/page_alloc.c | 4 ++++
mm/slab.c | 5 ++++-
mm/vmstat.c | 8 +++++++-
7 files changed, 44 insertions(+), 6 deletions(-)
diff -puN include/linux/gfp.h~optional-zone_dma-in-the-vm include/linux/gfp.h
--- a/include/linux/gfp.h~optional-zone_dma-in-the-vm
+++ a/include/linux/gfp.h
@@ -85,8 +85,10 @@ struct vm_area_struct;
static inline enum zone_type gfp_zone(gfp_t flags)
{
+#ifdef CONFIG_ZONE_DMA
if (flags & __GFP_DMA)
return ZONE_DMA;
+#endif
#ifdef CONFIG_ZONE_DMA32
if (flags & __GFP_DMA32)
return ZONE_DMA32;
diff -puN include/linux/mmzone.h~optional-zone_dma-in-the-vm include/linux/mmzone.h
--- a/include/linux/mmzone.h~optional-zone_dma-in-the-vm
+++ a/include/linux/mmzone.h
@@ -91,6 +91,7 @@ struct per_cpu_pageset {
#endif
enum zone_type {
+#ifdef CONFIG_ZONE_DMA
/*
* ZONE_DMA is used when there are devices that are not able
* to do DMA to all of addressable memory (ZONE_NORMAL). Then we
@@ -111,6 +112,7 @@ enum zone_type {
* <16M.
*/
ZONE_DMA,
+#endif
#ifdef CONFIG_ZONE_DMA32
/*
* x86_64 needs two ZONE_DMAs because it supports devices that are
@@ -148,7 +150,11 @@ enum zone_type {
*/
#if !defined(CONFIG_ZONE_DMA32) && !defined(CONFIG_HIGHMEM)
+#if !defined(CONFIG_ZONE_DMA)
+#define ZONES_SHIFT 0
+#else
#define ZONES_SHIFT 1
+#endif
#else
#define ZONES_SHIFT 2
#endif
@@ -448,7 +454,11 @@ static inline int is_dma32(struct zone *
static inline int is_dma(struct zone *zone)
{
+#ifdef CONFIG_ZONE_DMA
return zone == zone->zone_pgdat->node_zones + ZONE_DMA;
+#else
+ return 0;
+#endif
}
/* These two functions are used to setup the per zone pages min values */
diff -puN include/linux/slab.h~optional-zone_dma-in-the-vm include/linux/slab.h
--- a/include/linux/slab.h~optional-zone_dma-in-the-vm
+++ a/include/linux/slab.h
@@ -72,7 +72,11 @@ extern const char *kmem_cache_name(kmem_
struct cache_sizes {
size_t cs_size;
kmem_cache_t *cs_cachep;
+#ifdef CONFIG_ZONE_DMA
kmem_cache_t *cs_dmacachep;
+#else
+#define cs_dmacachep cs_cachep
+#endif
};
extern struct cache_sizes malloc_sizes[];
diff -puN include/linux/vmstat.h~optional-zone_dma-in-the-vm include/linux/vmstat.h
--- a/include/linux/vmstat.h~optional-zone_dma-in-the-vm
+++ a/include/linux/vmstat.h
@@ -18,6 +18,12 @@
* generated will simply be the increment of a global address.
*/
+#ifdef CONFIG_ZONE_DMA
+#define DMA_ZONE(xx) xx##_DMA,
+#else
+#define DMA_ZONE(xx)
+#endif
+
#ifdef CONFIG_ZONE_DMA32
#define DMA32_ZONE(xx) xx##_DMA32,
#else
@@ -30,7 +36,7 @@
#define HIGHMEM_ZONE(xx)
#endif
-#define FOR_ALL_ZONES(xx) xx##_DMA, DMA32_ZONE(xx) xx##_NORMAL HIGHMEM_ZONE(xx)
+#define FOR_ALL_ZONES(xx) DMA_ZONE(xx) DMA32_ZONE(xx) xx##_NORMAL HIGHMEM_ZONE(xx)
enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
FOR_ALL_ZONES(PGALLOC),
@@ -89,7 +95,8 @@ extern void vm_events_fold_cpu(int cpu);
#endif /* CONFIG_VM_EVENT_COUNTERS */
#define __count_zone_vm_events(item, zone, delta) \
- __count_vm_events(item##_DMA + zone_idx(zone), delta)
+ __count_vm_events(item##_NORMAL - ZONE_NORMAL + \
+ zone_idx(zone), delta)
/*
* Zone based page accounting with per cpu differentials.
@@ -136,14 +143,16 @@ static inline unsigned long node_page_st
struct zone *zones = NODE_DATA(node)->node_zones;
return
+#ifdef CONFIG_ZONE_DMA
+ zone_page_state(&zones[ZONE_DMA], item) +
+#endif
#ifdef CONFIG_ZONE_DMA32
zone_page_state(&zones[ZONE_DMA32], item) +
#endif
- zone_page_state(&zones[ZONE_NORMAL], item) +
#ifdef CONFIG_HIGHMEM
zone_page_state(&zones[ZONE_HIGHMEM], item) +
#endif
- zone_page_state(&zones[ZONE_DMA], item);
+ zone_page_state(&zones[ZONE_NORMAL], item);
}
extern void zone_statistics(struct zonelist *, struct zone *);
diff -puN mm/page_alloc.c~optional-zone_dma-in-the-vm mm/page_alloc.c
--- a/mm/page_alloc.c~optional-zone_dma-in-the-vm
+++ a/mm/page_alloc.c
@@ -71,7 +71,9 @@ static void __free_pages_ok(struct page
* don't need any ZONE_NORMAL reservation
*/
int sysctl_lowmem_reserve_ratio[MAX_NR_ZONES-1] = {
+#ifdef CONFIG_ZONE_DMA
256,
+#endif
#ifdef CONFIG_ZONE_DMA32
256,
#endif
@@ -83,7 +85,9 @@ int sysctl_lowmem_reserve_ratio[MAX_NR_Z
EXPORT_SYMBOL(totalram_pages);
static char *zone_names[MAX_NR_ZONES] = {
+#ifdef CONFIG_ZONE_DMA
"DMA",
+#endif
#ifdef CONFIG_ZONE_DMA32
"DMA32",
#endif
diff -puN mm/slab.c~optional-zone_dma-in-the-vm mm/slab.c
--- a/mm/slab.c~optional-zone_dma-in-the-vm
+++ a/mm/slab.c
@@ -1451,13 +1451,14 @@ void __init kmem_cache_init(void)
ARCH_KMALLOC_FLAGS|SLAB_PANIC,
NULL, NULL);
}
-
+#ifdef CONFIG_ZONE_DMA
sizes->cs_dmacachep = kmem_cache_create(names->name_dma,
sizes->cs_size,
ARCH_KMALLOC_MINALIGN,
ARCH_KMALLOC_FLAGS|SLAB_CACHE_DMA|
SLAB_PANIC,
NULL, NULL);
+#endif
sizes++;
names++;
}
@@ -2269,8 +2270,10 @@ kmem_cache_create (const char *name, siz
cachep->slab_size = slab_size;
cachep->flags = flags;
cachep->gfpflags = 0;
+#ifdef CONFIG_ZONE_DMA
if (flags & SLAB_CACHE_DMA)
cachep->gfpflags |= GFP_DMA;
+#endif
cachep->buffer_size = size;
if (flags & CFLGS_OFF_SLAB) {
diff -puN mm/vmstat.c~optional-zone_dma-in-the-vm mm/vmstat.c
--- a/mm/vmstat.c~optional-zone_dma-in-the-vm
+++ a/mm/vmstat.c
@@ -438,6 +438,12 @@ struct seq_operations fragmentation_op =
.show = frag_show,
};
+#ifdef CONFIG_ZONE_DMA
+#define TEXT_FOR_DMA(xx) xx "_dma",
+#else
+#define TEXT_FOR_DMA(xx)
+#endif
+
#ifdef CONFIG_ZONE_DMA32
#define TEXT_FOR_DMA32(xx) xx "_dma32",
#else
@@ -450,7 +456,7 @@ struct seq_operations fragmentation_op =
#define TEXT_FOR_HIGHMEM(xx)
#endif
-#define TEXTS_FOR_ZONES(xx) xx "_dma", TEXT_FOR_DMA32(xx) xx "_normal", \
+#define TEXTS_FOR_ZONES(xx) TEXT_FOR_DMA(xx) TEXT_FOR_DMA32(xx) xx "_normal", \
TEXT_FOR_HIGHMEM(xx)
static char *vmstat_text[] = {
_
Patches currently in -mm which might be from clameter@xxxxxxx are
fix-longstanding-load-balancing-bug-in-the-scheduler.patch
cleanup-radix_tree_derefreplace_slot-calling-conventions-warning-fixes.patch
reduce-max_nr_zones-remove-two-strange-uses-of-max_nr_zones.patch
reduce-max_nr_zones-fix-max_nr_zones-array-initializations.patch
reduce-max_nr_zones-make-display-of-highmem-counters-conditional-on-config_highmem.patch
reduce-max_nr_zones-make-display-of-highmem-counters-conditional-on-config_highmem-tidy.patch
reduce-max_nr_zones-move-highmem-counters-into-highmemc-h.patch
reduce-max_nr_zones-move-highmem-counters-into-highmemc-h-fix.patch
reduce-max_nr_zones-page-allocator-zone_highmem-cleanup.patch
reduce-max_nr_zones-use-enum-to-define-zones-reformat-and-comment.patch
reduce-max_nr_zones-use-enum-to-define-zones-reformat-and-comment-cleanup.patch
reduce-max_nr_zones-make-zone_dma32-optional.patch
reduce-max_nr_zones-make-zone_highmem-optional.patch
reduce-max_nr_zones-make-zone_highmem-optional-fix.patch
reduce-max_nr_zones-make-zone_highmem-optional-fix-fix.patch
reduce-max_nr_zones-remove-display-of-counters-for-unconfigured-zones.patch
reduce-max_nr_zones-fix-i386-srat-check-for-max_nr_zones.patch
mempolicies-fix-policy_zone-check.patch
apply-type-enum-zone_type.patch
apply-type-enum-zone_type-fix.patch
linearly-index-zone-node_zonelists.patch
slab-respect-architecture-and-caller-mandated-alignment.patch
slab-optimize-kmalloc_node-the-same-way-as-kmalloc.patch
slab-optimize-kmalloc_node-the-same-way-as-kmalloc-fix.patch
slab-extract-__kmem_cache_destroy-from-kmem_cache_destroy.patch
slab-do-not-panic-when-alloc_kmemlist-fails-and-slab-is-up.patch
add-__gfp_thisnode-to-avoid-fallback-to-other-nodes-and-ignore.patch
add-__gfp_thisnode-to-avoid-fallback-to-other-nodes-and-ignore-fix.patch
sys_move_pages-do-not-fall-back-to-other-nodes.patch
guarantee-that-the-uncached-allocator-gets-pages-on-the-correct.patch
cleanup-add-zone-pointer-to-get_page_from_freelist.patch
profiling-require-buffer-allocation-on-the-correct-node.patch
define-easier-to-handle-gfp_thisnode.patch
optimize-free_one_page.patch
do-not-check-unpopulated-zones-for-draining-and-counter.patch
extract-the-allocpercpu-functions-from-the-slab-allocator.patch
replace-min_unmapped_ratio-by-min_unmapped_pages-in-struct-zone.patch
zvc-support-nr_slab_reclaimable--nr_slab_unreclaimable.patch
zone_reclaim-dynamic-slab-reclaim.patch
zone_reclaim-dynamic-slab-reclaim-tidy.patch
zone-reclaim-with-slab-avoid-unecessary-off-node-allocations.patch
hugepages-use-page_to_nid-rather-than-traversing-zone-pointers.patch
numa-add-zone_to_nid-function.patch
numa-add-zone_to_nid-function-update.patch
slab-fix-kmalloc_node-applying-memory-policies-if-nodeid-==-numa_node_id.patch
add-numa_build-definition-in-kernelh-to-avoid-ifdef.patch
disable-gfp_thisnode-in-the-non-numa-case.patch
gfp_thisnode-for-the-slab-allocator-v2.patch
add-node-to-zone-for-the-numa-case.patch
add-node-to-zone-for-the-numa-case-fix.patch
get-rid-of-zone_table.patch
get-rid-of-zone_table-fix.patch
do-not-allocate-pagesets-for-unpopulated-zones.patch
zone_statistics-use-hot-node-instead-of-cold-zone_pgdat.patch
deal-with-cases-of-zone_dma-meaning-the-first-zone.patch
introduce-config_zone_dma.patch
optional-zone_dma-in-the-vm.patch
optional-zone_dma-for-i386.patch
optional-zone_dma-for-x86_64.patch
optional-zone_dma-for-ia64.patch
remove-zone_dma-remains-from-parisc.patch
remove-zone_dma-remains-from-sh-sh64.patch
x86-implement-always-locked-bit-ops-for-memory-shared-with-an-smp-hypervisor.patch
scheduler-numa-aware-placement-of-sched_group_allnodes.patch
zvc-support-nr_slab_reclaimable--nr_slab_unreclaimable-swap_prefetch.patch
reduce-max_nr_zones-swap_prefetch-remove-incorrect-use-of-zone_highmem.patch
numa-add-zone_to_nid-function-swap_prefetch.patch
readahead-state-based-method-aging-accounting-apply-type-enum-zone_type-readahead.patch
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