Home » Mailing lists » Devel » [PATCH] BC: resource beancounters (v5) (added userpages reclamation)
| [PATCH 6/10] BC: kernel memory (core) [message #7164 is a reply to message #7157] |
Thu, 05 October 2006 15:52   |
Kirill Korotaev
Messages: 137
Registered: January 2006
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Senior Member |
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Introduce BC_KMEMSIZE resource which accounts kernel
objects allocated by task's request.
Reference to BC is kept on struct page or slab object.
For slabs each struct slab contains a set of pointers
corresponding objects are charged to.
Allocation charge rules:
1. Pages - if allocation is performed with __GFP_BC flag - page
is charged to current's exec_bc.
2. Slabs - kmem_cache may be created with SLAB_BC flag - in this
case each allocation is charged. Caches used by kmalloc are
created with SLAB_BC | SLAB_BC_NOCHARGE flags. In this case
only __GFP_BC allocations are charged.
Signed-off-by: Pavel Emelianov <xemul@openvz.org>
Signed-off-by: Kirill Korotaev <dev@openvz.org>
---
include/bc/kmem.h | 48 ++++++++++++++++++++
include/linux/gfp.h | 8 ++-
include/linux/mm.h | 1
include/linux/mm_types.h | 3 +
include/linux/slab.h | 4 +
include/linux/vmalloc.h | 1
kernel/bc/kmem.c | 112 +++++++++++++++++++++++++++++++++++++++++++++++
mm/mempool.c | 2
mm/page_alloc.c | 11 ++++
mm/slab.c | 112 +++++++++++++++++++++++++++++++++++++++--------
mm/vmalloc.c | 6 ++
11 files changed, 287 insertions(+), 21 deletions(-)
--- /dev/null 2006-07-18 14:52:43.075228448 +0400
+++ ./include/bc/kmem.h 2006-10-05 12:13:58.000000000 +0400
@@ -0,0 +1,48 @@
+/*
+ * include/bc/kmem.h
+ *
+ * Copyright (C) 2006 OpenVZ SWsoft Inc
+ *
+ */
+
+#ifndef __BC_KMEM_H_
+#define __BC_KMEM_H_
+
+/*
+ * BC_KMEMSIZE accounting
+ */
+
+#include <linux/slab.h>
+#include <linux/gfp.h>
+
+struct page;
+struct beancounter;
+
+#ifdef CONFIG_BEANCOUNTERS
+int __must_check bc_page_charge(struct page *page, int order, gfp_t flags);
+void bc_page_uncharge(struct page *page, int order);
+
+int __must_check bc_slab_charge(kmem_cache_t *cachep, void *obj, gfp_t flags);
+void bc_slab_uncharge(kmem_cache_t *cachep, void *obj);
+#else
+static inline int __must_check bc_page_charge(struct page *page, int order,
+ gfp_t flags)
+{
+ return 0;
+}
+
+static inline void bc_page_uncharge(struct page *page, int order)
+{
+}
+
+static inline int __must_check bc_slab_charge(kmem_cache_t *cachep, void *obj,
+ gfp_t flags)
+{
+ return 0;
+}
+
+static inline void bc_slab_uncharge(kmem_cache_t *cachep, void *obj)
+{
+}
+#endif
+#endif /* __BC_SLAB_H_ */
--- ./include/linux/gfp.h.bc_kmem_core 2006-10-05 11:42:43.000000000 +0400
+++ ./include/linux/gfp.h 2006-10-05 12:12:24.000000000 +0400
@@ -46,15 +46,18 @@ struct vm_area_struct;
#define __GFP_NOMEMALLOC ((__force gfp_t)0x10000u) /* Don't use emergency reserves */
#define __GFP_HARDWALL ((__force gfp_t)0x20000u) /* Enforce hardwall cpuset memory allocs */
#define __GFP_THISNODE ((__force gfp_t)0x40000u)/* No fallback, no policies */
+#define __GFP_BC ((__force gfp_t)0x80000u) /* Charge allocation with BC */
+#define __GFP_BC_LIMIT ((__force gfp_t)0x100000u) /* Charge against BC limit */
-#define __GFP_BITS_SHIFT 20 /* Room for 20 __GFP_FOO bits */
+#define __GFP_BITS_SHIFT 21 /* Room for 21 __GFP_FOO bits */
#define __GFP_BITS_MASK ((__force gfp_t)((1 << __GFP_BITS_SHIFT) - 1))
/* if you forget to add the bitmask here kernel will crash, period */
#define GFP_LEVEL_MASK (__GFP_WAIT|__GFP_HIGH|__GFP_IO|__GFP_FS| \
__GFP_COLD|__GFP_NOWARN|__GFP_REPEAT| \
__GFP_NOFAIL|__GFP_NORETRY|__GFP_NO_GROW|__GFP_COMP| \
- __GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_THISNODE)
+ __GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_THISNODE| \
+ __GFP_BC|__GFP_BC_LIMIT)
/* This equals 0, but use constants in case they ever change */
#define GFP_NOWAIT (GFP_ATOMIC & ~__GFP_HIGH)
@@ -63,6 +66,7 @@ struct vm_area_struct;
#define GFP_NOIO (__GFP_WAIT)
#define GFP_NOFS (__GFP_WAIT | __GFP_IO)
#define GFP_KERNEL (__GFP_WAIT | __GFP_IO | __GFP_FS)
+#define GFP_KERNEL_BC (__GFP_WAIT | __GFP_IO | __GFP_FS | __GFP_BC)
#define GFP_USER (__GFP_WAIT | __GFP_IO | __GFP_FS | __GFP_HARDWALL)
#define GFP_HIGHUSER (__GFP_WAIT | __GFP_IO | __GFP_FS | __GFP_HARDWALL | \
__GFP_HIGHMEM)
--- ./include/linux/mm.h.bc_kmem_core 2006-10-05 11:42:43.000000000 +0400
+++ ./include/linux/mm.h 2006-10-05 12:12:24.000000000 +0400
@@ -219,6 +219,7 @@ struct vm_operations_struct {
struct mmu_gather;
struct inode;
+#define page_bc(page) ((page)->bc)
#define page_private(page) ((page)->private)
#define set_page_private(page, v) ((page)->private = (v))
--- ./include/linux/mm_types.h.bc_kmem_core 2006-10-05 11:42:43.000000000 +0400
+++ ./include/linux/mm_types.h 2006-10-05 12:12:24.000000000 +0400
@@ -62,6 +62,9 @@ struct page {
void *virtual; /* Kernel virtual address (NULL if
not kmapped, ie. highmem) */
#endif /* WANT_PAGE_VIRTUAL */
+#ifdef CONFIG_BEANCOUNTERS
+ struct beancounter *bc;
+#endif
#ifdef CONFIG_PAGE_OWNER
int order;
unsigned int gfp_mask;
--- ./include/linux/slab.h.bc_kmem_core 2006-10-05 11:42:43.000000000 +0400
+++ ./include/linux/slab.h 2006-10-05 12:12:24.000000000 +0400
@@ -46,6 +46,8 @@ typedef struct kmem_cache kmem_cache_t;
#define SLAB_PANIC 0x00040000UL /* panic if kmem_cache_create() fails */
#define SLAB_DESTROY_BY_RCU 0x00080000UL /* defer freeing pages to RCU */
#define SLAB_MEM_SPREAD 0x00100000UL /* Spread some memory over cpuset */
+#define SLAB_BC 0x00200000UL /* Account with BC */
+#define SLAB_BC_NOCHARGE 0x00400000UL /* Explicit accounting */
/* flags passed to a constructor func */
#define SLAB_CTOR_CONSTRUCTOR 0x001UL /* if not set, then deconstructor */
@@ -305,6 +307,8 @@ extern kmem_cache_t *fs_cachep;
extern kmem_cache_t *sighand_cachep;
extern kmem_cache_t *bio_cachep;
+struct beancounter;
+struct beancounter **kmem_cache_bcp(kmem_cache_t *cachep, void *obj);
#endif /* __KERNEL__ */
#endif /* _LINUX_SLAB_H */
--- ./include/linux/vmalloc.h.bc_kmem_core 2006-10-05 11:42:43.000000000 +0400
+++ ./include/linux/vmalloc.h 2006-10-05 12:12:24.000000000 +0400
@@ -36,6 +36,7 @@ struct vm_struct {
* Highlevel APIs for driver use
*/
extern void *vmalloc(unsigned long size);
+extern void *vmalloc_bc(unsigned long size);
extern void *vmalloc_user(unsigned long size);
extern void *vmalloc_node(unsigned long size, int node);
extern void *vmalloc_exec(unsigned long size);
--- /dev/null 2006-07-18 14:52:43.075228448 +0400
+++ ./kernel/bc/kmem.c 2006-10-05 12:13:35.000000000 +0400
@@ -0,0 +1,112 @@
+/*
+ * kernel/bc/kmem.c
+ *
+ * Copyright (C) 2006 OpenVZ SWsoft Inc
+ *
+ */
+
+#include <linux/sched.h>
+#include <linux/gfp.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+
+#include <bc/beancounter.h>
+#include <bc/kmem.h>
+#include <bc/task.h>
+
+#define BC_KMEMSIZE_BARRIER (64 * 1024)
+#define BC_KMEMSIZE_LIMIT (64 * 1024)
+
+/*
+ * Slab accounting
+ */
+
+int bc_slab_charge(kmem_cache_t *cachep, void *objp, gfp_t flags)
+{
+ unsigned int size;
+ struct beancounter *bc, **slab_bcp;
+
+ bc = get_exec_bc();
+
+ size = kmem_cache_size(cachep);
+ if (bc_charge(bc, BC_KMEMSIZE, size,
+ (flags & __GFP_BC_LIMIT ? BC_LIMIT : BC_BARRIER)))
+ return -ENOMEM;
+
+ slab_bcp = kmem_cache_bcp(cachep, objp);
+ BUG_ON(*slab_bcp != NULL);
+ *slab_bcp = bc_get(bc);
+ return 0;
+}
+
+void bc_slab_uncharge(kmem_cache_t *cachep, void *objp)
+{
+ unsigned int size;
+ struct beancounter *bc, **slab_bcp;
+
+ slab_bcp = kmem_cache_bcp(cachep, objp);
+ if (*slab_bcp == NULL)
+ return;
+
+ bc = *slab_bcp;
+ size = kmem_cache_size(cachep);
+ bc_uncharge(bc, BC_KMEMSIZE, size);
+ bc_put(bc);
+ *slab_bcp = NULL;
+}
+
+/*
+ * Pages accounting
+ */
+
+int bc_page_charge(struct page *page, int order, gfp_t flags)
+{
+ struct beancounter *bc;
+
+ bc = get_exec_bc();
+
+ if (bc_charge(bc, BC_KMEMSIZE, PAGE_SIZE << order,
+ (flags & __GFP_BC_LIMIT ? BC_LIMIT : BC_BARRIER)))
+ return -ENOMEM;
+
+ BUG_ON(page_bc(page) != NULL);
+ page_bc(page) = bc_get(bc);
+ return 0;
+}
+
+void bc_page_uncharge(struct page *page, int order)
+{
+ struct beancounter *bc;
+
+ bc = page_bc(page);
+ if (bc == NULL)
+ return;
+
+ bc_uncharge(bc, BC_KMEMSIZE, PAGE_SIZE << order);
+ bc_put(bc);
+ page_bc(page) = NULL;
+}
+
+/*
+ * Generic resource info
+ */
+
+static int bc_kmem_init(struct beancounter *bc, gfp_t mask)
+{
+ bc_init_resource(bc, BC_KMEMSIZE,
+ BC_KMEMSIZE_BARRIER, BC_KMEMSIZE_LIMIT);
+ return 0;
+}
+
+struct bc_resource bc_kmem_resource = {
+ .bcr_name = "kmemsize",
+ .bcr_init = bc_kmem_init,
+};
+
+static int __init bc_kmem_init_resource(void)
+{
+ bc_register_resource(BC_KMEMSIZE, &bc_kmem_resource);
+ return 0;
+}
+
+__initcall(bc_kmem_init_resource);
--- ./mm/mempool.c.bc_kmem_core 2006-09-20 14:46:41.000000000 +0400
+++ ./mm/mempool.c 2006-10-05 12:12:24.000000000 +0400
@@ -119,6 +119,7 @@ int mempool_resize(mempool_t *pool, int
unsigned long flags;
BUG_ON(new_min_nr <= 0);
+ gfp_mask &= ~__GFP_BC;
spin_lock_irqsave(&pool->lock, flags);
if (new_min_nr <= pool->min_nr) {
@@ -212,6 +213,7 @@ void * mempool_alloc(mempool_t *pool, gf
gfp_mask |= __GFP_NOMEMALLOC; /* don't allocate emergency reserves */
gfp_mask |= __GFP_NORETRY; /* don't loop in __alloc_pages */
gfp_mask |= __GFP_NOWARN; /* failures are OK */
+ gfp_mask &= ~__GFP_BC; /* do not charge */
gfp_temp = gfp_mask & ~(__GFP_WAIT|__GFP_IO);
--- ./mm/page_alloc.c.bc_kmem_core 2006-10-05 11:42:43.000000000 +0400
+++ ./mm/page_alloc.c 2006-10-05 12:12:24.000000000 +0400
@@ -40,6 +40,8 @@
#include <linux/sort.h>
#include <linux/pfn.h>
+#include <bc/kmem.h>
+
#include <asm/tlbflush.h>
#include <asm/div64.h>
#include "internal.h"
@@ -517,6 +519,8 @@ static void __free_pages_ok(struct page
if (reserved)
return;
+ bc_page_uncharge(page, order);
+
kernel_map_pages(page, 1 << order, 0);
local_irq_save(flags);
__count_vm_events(PGFREE, 1 << order);
@@ -800,6 +804,8 @@ static
...
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Current Time: Mon Sep 01 23:23:17 GMT 2025
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