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author | Paul Mundt <lethal@linux-sh.org> | 2010-02-05 03:16:39 (GMT) |
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committer | Paul Mundt <lethal@linux-sh.org> | 2010-02-05 03:16:39 (GMT) |
commit | 8e04221029067cbaff3fc8f4daf991532afbcbaf (patch) | |
tree | 18cf757bcd315c76f5f458aa72a0a57db0a78985 /mm | |
parent | 9ad62ec4f752c82b39aa5927f23d894b46ae10b9 (diff) | |
parent | 2c940db250c1610d95ea5331dc819b8bd4db96ae (diff) | |
download | linux-8e04221029067cbaff3fc8f4daf991532afbcbaf.tar.xz |
Merge branch 'sh/stable-updates'
Diffstat (limited to 'mm')
-rw-r--r-- | mm/filemap.c | 3 | ||||
-rw-r--r-- | mm/hugetlb.c | 7 | ||||
-rw-r--r-- | mm/vmalloc.c | 110 |
3 files changed, 92 insertions, 28 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index e373692..698ea80 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -2232,6 +2232,9 @@ again: if (unlikely(status)) break; + if (mapping_writably_mapped(mapping)) + flush_dcache_page(page); + pagefault_disable(); copied = iov_iter_copy_from_user_atomic(page, i, offset, bytes); pagefault_enable(); diff --git a/mm/hugetlb.c b/mm/hugetlb.c index e91b81b..2d16fa6 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1515,10 +1515,9 @@ static struct attribute_group hstate_attr_group = { .attrs = hstate_attrs, }; -static int __init hugetlb_sysfs_add_hstate(struct hstate *h, - struct kobject *parent, - struct kobject **hstate_kobjs, - struct attribute_group *hstate_attr_group) +static int hugetlb_sysfs_add_hstate(struct hstate *h, struct kobject *parent, + struct kobject **hstate_kobjs, + struct attribute_group *hstate_attr_group) { int retval; int hi = h - hstates; diff --git a/mm/vmalloc.c b/mm/vmalloc.c index d55d905..ae00746 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -509,6 +509,9 @@ static unsigned long lazy_max_pages(void) static atomic_t vmap_lazy_nr = ATOMIC_INIT(0); +/* for per-CPU blocks */ +static void purge_fragmented_blocks_allcpus(void); + /* * Purges all lazily-freed vmap areas. * @@ -539,6 +542,9 @@ static void __purge_vmap_area_lazy(unsigned long *start, unsigned long *end, } else spin_lock(&purge_lock); + if (sync) + purge_fragmented_blocks_allcpus(); + rcu_read_lock(); list_for_each_entry_rcu(va, &vmap_area_list, list) { if (va->flags & VM_LAZY_FREE) { @@ -667,8 +673,6 @@ static bool vmap_initialized __read_mostly = false; struct vmap_block_queue { spinlock_t lock; struct list_head free; - struct list_head dirty; - unsigned int nr_dirty; }; struct vmap_block { @@ -678,10 +682,9 @@ struct vmap_block { unsigned long free, dirty; DECLARE_BITMAP(alloc_map, VMAP_BBMAP_BITS); DECLARE_BITMAP(dirty_map, VMAP_BBMAP_BITS); - union { - struct list_head free_list; - struct rcu_head rcu_head; - }; + struct list_head free_list; + struct rcu_head rcu_head; + struct list_head purge; }; /* Queue of free and dirty vmap blocks, for allocation and flushing purposes */ @@ -757,7 +760,7 @@ static struct vmap_block *new_vmap_block(gfp_t gfp_mask) vbq = &get_cpu_var(vmap_block_queue); vb->vbq = vbq; spin_lock(&vbq->lock); - list_add(&vb->free_list, &vbq->free); + list_add_rcu(&vb->free_list, &vbq->free); spin_unlock(&vbq->lock); put_cpu_var(vmap_block_queue); @@ -776,8 +779,6 @@ static void free_vmap_block(struct vmap_block *vb) struct vmap_block *tmp; unsigned long vb_idx; - BUG_ON(!list_empty(&vb->free_list)); - vb_idx = addr_to_vb_idx(vb->va->va_start); spin_lock(&vmap_block_tree_lock); tmp = radix_tree_delete(&vmap_block_tree, vb_idx); @@ -788,12 +789,61 @@ static void free_vmap_block(struct vmap_block *vb) call_rcu(&vb->rcu_head, rcu_free_vb); } +static void purge_fragmented_blocks(int cpu) +{ + LIST_HEAD(purge); + struct vmap_block *vb; + struct vmap_block *n_vb; + struct vmap_block_queue *vbq = &per_cpu(vmap_block_queue, cpu); + + rcu_read_lock(); + list_for_each_entry_rcu(vb, &vbq->free, free_list) { + + if (!(vb->free + vb->dirty == VMAP_BBMAP_BITS && vb->dirty != VMAP_BBMAP_BITS)) + continue; + + spin_lock(&vb->lock); + if (vb->free + vb->dirty == VMAP_BBMAP_BITS && vb->dirty != VMAP_BBMAP_BITS) { + vb->free = 0; /* prevent further allocs after releasing lock */ + vb->dirty = VMAP_BBMAP_BITS; /* prevent purging it again */ + bitmap_fill(vb->alloc_map, VMAP_BBMAP_BITS); + bitmap_fill(vb->dirty_map, VMAP_BBMAP_BITS); + spin_lock(&vbq->lock); + list_del_rcu(&vb->free_list); + spin_unlock(&vbq->lock); + spin_unlock(&vb->lock); + list_add_tail(&vb->purge, &purge); + } else + spin_unlock(&vb->lock); + } + rcu_read_unlock(); + + list_for_each_entry_safe(vb, n_vb, &purge, purge) { + list_del(&vb->purge); + free_vmap_block(vb); + } +} + +static void purge_fragmented_blocks_thiscpu(void) +{ + purge_fragmented_blocks(smp_processor_id()); +} + +static void purge_fragmented_blocks_allcpus(void) +{ + int cpu; + + for_each_possible_cpu(cpu) + purge_fragmented_blocks(cpu); +} + static void *vb_alloc(unsigned long size, gfp_t gfp_mask) { struct vmap_block_queue *vbq; struct vmap_block *vb; unsigned long addr = 0; unsigned int order; + int purge = 0; BUG_ON(size & ~PAGE_MASK); BUG_ON(size > PAGE_SIZE*VMAP_MAX_ALLOC); @@ -806,24 +856,38 @@ again: int i; spin_lock(&vb->lock); + if (vb->free < 1UL << order) + goto next; + i = bitmap_find_free_region(vb->alloc_map, VMAP_BBMAP_BITS, order); - if (i >= 0) { - addr = vb->va->va_start + (i << PAGE_SHIFT); - BUG_ON(addr_to_vb_idx(addr) != - addr_to_vb_idx(vb->va->va_start)); - vb->free -= 1UL << order; - if (vb->free == 0) { - spin_lock(&vbq->lock); - list_del_init(&vb->free_list); - spin_unlock(&vbq->lock); + if (i < 0) { + if (vb->free + vb->dirty == VMAP_BBMAP_BITS) { + /* fragmented and no outstanding allocations */ + BUG_ON(vb->dirty != VMAP_BBMAP_BITS); + purge = 1; } - spin_unlock(&vb->lock); - break; + goto next; } + addr = vb->va->va_start + (i << PAGE_SHIFT); + BUG_ON(addr_to_vb_idx(addr) != + addr_to_vb_idx(vb->va->va_start)); + vb->free -= 1UL << order; + if (vb->free == 0) { + spin_lock(&vbq->lock); + list_del_rcu(&vb->free_list); + spin_unlock(&vbq->lock); + } + spin_unlock(&vb->lock); + break; +next: spin_unlock(&vb->lock); } + + if (purge) + purge_fragmented_blocks_thiscpu(); + put_cpu_var(vmap_block_queue); rcu_read_unlock(); @@ -860,11 +924,11 @@ static void vb_free(const void *addr, unsigned long size) BUG_ON(!vb); spin_lock(&vb->lock); - bitmap_allocate_region(vb->dirty_map, offset >> PAGE_SHIFT, order); + BUG_ON(bitmap_allocate_region(vb->dirty_map, offset >> PAGE_SHIFT, order)); vb->dirty += 1UL << order; if (vb->dirty == VMAP_BBMAP_BITS) { - BUG_ON(vb->free || !list_empty(&vb->free_list)); + BUG_ON(vb->free); spin_unlock(&vb->lock); free_vmap_block(vb); } else @@ -1033,8 +1097,6 @@ void __init vmalloc_init(void) vbq = &per_cpu(vmap_block_queue, i); spin_lock_init(&vbq->lock); INIT_LIST_HEAD(&vbq->free); - INIT_LIST_HEAD(&vbq->dirty); - vbq->nr_dirty = 0; } /* Import existing vmlist entries. */ |