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Merge branch 'topic/slab/earlyboot-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6

Browse Source 
* 'topic/slab/earlyboot-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6:
  slab: setup cpu caches later on when interrupts are enabled
  slab,slub: don't enable interrupts during early boot
  slab: fix gfp flag in setup_cpu_cache()
  x86: make zap_low_mapping could be used early
  irq: slab alloc for default irq_affinity
  memcg: fix page_cgroup fatal error in FLATMEM
This commit is contained in:
Linus Torvalds 2009-06-12 09:52:30 -07:00
commit 6d21491838
13 changed files with 101 additions and 37 deletions
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2
arch/x86/include/asm/tlbflush.h
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@ -172,6 +172,6 @@ static inline void flush_tlb_kernel_range(unsigned long start,
flush_tlb_all();
}
extern void zap_low_mappings(void);
extern void zap_low_mappings(bool early);
#endif /* _ASM_X86_TLBFLUSH_H */

2
arch/x86/kernel/smpboot.c
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@ -873,7 +873,7 @@ int __cpuinit native_cpu_up(unsigned int cpu)
err = do_boot_cpu(apicid, cpu);
zap_low_mappings();
zap_low_mappings(false);
low_mappings = 0;
#else
err = do_boot_cpu(apicid, cpu);

10
arch/x86/mm/init_32.c
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@ -564,7 +564,7 @@ static inline void save_pg_dir(void)
}
#endif /* !CONFIG_ACPI_SLEEP */
void zap_low_mappings(void)
void zap_low_mappings(bool early)
{
int i;
@ -581,7 +581,11 @@ void zap_low_mappings(void)
set_pgd(swapper_pg_dir+i, __pgd(0));
#endif
}
flush_tlb_all();
if (early)
__flush_tlb();
else
flush_tlb_all();
}
pteval_t __supported_pte_mask __read_mostly = ~(_PAGE_NX | _PAGE_GLOBAL | _PAGE_IOMAP);
@ -956,7 +960,7 @@ void __init mem_init(void)
test_wp_bit();
save_pg_dir();
zap_low_mappings();
zap_low_mappings(true);
}
#ifdef CONFIG_MEMORY_HOTPLUG

3
include/linux/gfp.h
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@ -85,6 +85,9 @@ struct vm_area_struct;
__GFP_NOWARN|__GFP_REPEAT|__GFP_NOFAIL|\
__GFP_NORETRY|__GFP_NOMEMALLOC)
/* Control slab gfp mask during early boot */
#define SLAB_GFP_BOOT_MASK __GFP_BITS_MASK & ~(__GFP_WAIT|__GFP_IO|__GFP_FS)
/* Control allocation constraints */
#define GFP_CONSTRAINT_MASK (__GFP_HARDWALL|__GFP_THISNODE)

18
include/linux/page_cgroup.h
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@ -18,7 +18,19 @@ struct page_cgroup {
};
void __meminit pgdat_page_cgroup_init(struct pglist_data *pgdat);
void __init page_cgroup_init(void);
#ifdef CONFIG_SPARSEMEM
static inline void __init page_cgroup_init_flatmem(void)
{
}
extern void __init page_cgroup_init(void);
#else
void __init page_cgroup_init_flatmem(void);
static inline void __init page_cgroup_init(void)
{
}
#endif
struct page_cgroup *lookup_page_cgroup(struct page *page);
enum {
@ -87,6 +99,10 @@ static inline void page_cgroup_init(void)
{
}
static inline void __init page_cgroup_init_flatmem(void)
{
}
#endif
#ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP

2
include/linux/slab.h
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@ -319,4 +319,6 @@ static inline void *kzalloc_node(size_t size, gfp_t flags, int node)
return kmalloc_node(size, flags | __GFP_ZERO, node);
}
void __init kmem_cache_init_late(void);
#endif /* _LINUX_SLAB_H */

5
include/linux/slob_def.h
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@ -34,4 +34,9 @@ static __always_inline void *__kmalloc(size_t size, gfp_t flags)
return kmalloc(size, flags);
}
static inline void kmem_cache_init_late(void)
{
/* Nothing to do */
}
#endif /* __LINUX_SLOB_DEF_H */

2
include/linux/slub_def.h
View File

@ -302,4 +302,6 @@ static __always_inline void *kmalloc_node(size_t size, gfp_t flags, int node)
}
#endif
void __init kmem_cache_init_late(void);
#endif /* _LINUX_SLUB_DEF_H */

6
init/main.c
View File

@ -539,6 +539,11 @@ void __init __weak thread_info_cache_init(void)
*/
static void __init mm_init(void)
{
/*
* page_cgroup requires countinous pages as memmap
* and it's bigger than MAX_ORDER unless SPARSEMEM.
*/
page_cgroup_init_flatmem();
mem_init();
kmem_cache_init();
vmalloc_init();
@ -635,6 +640,7 @@ asmlinkage void __init start_kernel(void)
"enabled early\n");
early_boot_irqs_on();
local_irq_enable();
kmem_cache_init_late();
/*
* HACK ALERT! This is early. We're enabling the console before

2
kernel/irq/handle.c
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@ -45,7 +45,7 @@ void handle_bad_irq(unsigned int irq, struct irq_desc *desc)
#if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_HARDIRQS)
static void __init init_irq_default_affinity(void)
{
alloc_bootmem_cpumask_var(&irq_default_affinity);
alloc_cpumask_var(&irq_default_affinity, GFP_NOWAIT);
cpumask_setall(irq_default_affinity);
}
#else

29
mm/page_cgroup.c
View File

@ -47,8 +47,6 @@ static int __init alloc_node_page_cgroup(int nid)
struct page_cgroup *base, *pc;
unsigned long table_size;
unsigned long start_pfn, nr_pages, index;
struct page *page;
unsigned int order;
start_pfn = NODE_DATA(nid)->node_start_pfn;
nr_pages = NODE_DATA(nid)->node_spanned_pages;
@ -57,13 +55,11 @@ static int __init alloc_node_page_cgroup(int nid)
return 0;
table_size = sizeof(struct page_cgroup) * nr_pages;
order = get_order(table_size);
page = alloc_pages_node(nid, GFP_NOWAIT | __GFP_ZERO, order);
if (!page)
page = alloc_pages_node(-1, GFP_NOWAIT | __GFP_ZERO, order);
if (!page)
base = __alloc_bootmem_node_nopanic(NODE_DATA(nid),
table_size, PAGE_SIZE, __pa(MAX_DMA_ADDRESS));
if (!base)
return -ENOMEM;
base = page_address(page);
for (index = 0; index < nr_pages; index++) {
pc = base + index;
__init_page_cgroup(pc, start_pfn + index);
@ -73,7 +69,7 @@ static int __init alloc_node_page_cgroup(int nid)
return 0;
}
void __init page_cgroup_init(void)
void __init page_cgroup_init_flatmem(void)
{
int nid, fail;
@ -117,16 +113,11 @@ static int __init_refok init_section_page_cgroup(unsigned long pfn)
if (!section->page_cgroup) {
nid = page_to_nid(pfn_to_page(pfn));
table_size = sizeof(struct page_cgroup) * PAGES_PER_SECTION;
if (slab_is_available()) {
base = kmalloc_node(table_size,
GFP_KERNEL | __GFP_NOWARN, nid);
if (!base)
base = vmalloc_node(table_size, nid);
} else {
base = __alloc_bootmem_node_nopanic(NODE_DATA(nid),
table_size,
PAGE_SIZE, __pa(MAX_DMA_ADDRESS));
}
VM_BUG_ON(!slab_is_available());
base = kmalloc_node(table_size,
GFP_KERNEL | __GFP_NOWARN, nid);
if (!base)
base = vmalloc_node(table_size, nid);
} else {
/*
* We don't have to allocate page_cgroup again, but

41
mm/slab.c
View File

@ -303,6 +303,12 @@ struct kmem_list3 {
int free_touched; /* updated without locking */
};
/*
* The slab allocator is initialized with interrupts disabled. Therefore, make
* sure early boot allocations don't accidentally enable interrupts.
*/
static gfp_t slab_gfp_mask __read_mostly = SLAB_GFP_BOOT_MASK;
/*
* Need this for bootstrapping a per node allocator.
*/
@ -753,6 +759,7 @@ static enum {
NONE,
PARTIAL_AC,
PARTIAL_L3,
EARLY,
FULL
} g_cpucache_up;
@ -761,7 +768,7 @@ static enum {
*/
int slab_is_available(void)
{
return g_cpucache_up == FULL;
return g_cpucache_up >= EARLY;
}
static DEFINE_PER_CPU(struct delayed_work, reap_work);
@ -1625,19 +1632,27 @@ void __init kmem_cache_init(void)
}
}
/* 6) resize the head arrays to their final sizes */
{
struct kmem_cache *cachep;
mutex_lock(&cache_chain_mutex);
list_for_each_entry(cachep, &cache_chain, next)
if (enable_cpucache(cachep, GFP_NOWAIT))
BUG();
mutex_unlock(&cache_chain_mutex);
}
g_cpucache_up = EARLY;
/* Annotate slab for lockdep -- annotate the malloc caches */
init_lock_keys();
}
void __init kmem_cache_init_late(void)
{
struct kmem_cache *cachep;
/*
* Interrupts are enabled now so all GFP allocations are safe.
*/
slab_gfp_mask = __GFP_BITS_MASK;
/* 6) resize the head arrays to their final sizes */
mutex_lock(&cache_chain_mutex);
list_for_each_entry(cachep, &cache_chain, next)
if (enable_cpucache(cachep, GFP_NOWAIT))
BUG();
mutex_unlock(&cache_chain_mutex);
/* Done! */
g_cpucache_up = FULL;
@ -2102,7 +2117,7 @@ static int __init_refok setup_cpu_cache(struct kmem_cache *cachep, gfp_t gfp)
for_each_online_node(node) {
cachep->nodelists[node] =
kmalloc_node(sizeof(struct kmem_list3),
GFP_KERNEL, node);
gfp, node);
BUG_ON(!cachep->nodelists[node]);
kmem_list3_init(cachep->nodelists[node]);
}
@ -3354,6 +3369,8 @@ __cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid,
unsigned long save_flags;
void *ptr;
flags &= slab_gfp_mask;
lockdep_trace_alloc(flags);
if (slab_should_failslab(cachep, flags))
@ -3434,6 +3451,8 @@ __cache_alloc(struct kmem_cache *cachep, gfp_t flags, void *caller)
unsigned long save_flags;
void *objp;
flags &= slab_gfp_mask;
lockdep_trace_alloc(flags);
if (slab_should_failslab(cachep, flags))

16
mm/slub.c
View File

@ -178,6 +178,12 @@ static enum {
SYSFS /* Sysfs up */
} slab_state = DOWN;
/*
* The slab allocator is initialized with interrupts disabled. Therefore, make
* sure early boot allocations don't accidentally enable interrupts.
*/
static gfp_t slab_gfp_mask __read_mostly = SLAB_GFP_BOOT_MASK;
/* A list of all slab caches on the system */
static DECLARE_RWSEM(slub_lock);
static LIST_HEAD(slab_caches);
@ -1595,6 +1601,8 @@ static __always_inline void *slab_alloc(struct kmem_cache *s,
unsigned long flags;
unsigned int objsize;
gfpflags &= slab_gfp_mask;
lockdep_trace_alloc(gfpflags);
might_sleep_if(gfpflags & __GFP_WAIT);
@ -3104,6 +3112,14 @@ void __init kmem_cache_init(void)
nr_cpu_ids, nr_node_ids);
}
void __init kmem_cache_init_late(void)
{
/*
* Interrupts are enabled now so all GFP allocations are safe.
*/
slab_gfp_mask = __GFP_BITS_MASK;
}
/*
* Find a mergeable slab cache
*/