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hugetlb: allow bulk updating in hugetlb_*_quota()

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Add a second parameter 'delta' to hugetlb_get_quota and hugetlb_put_quota to
allow bulk updating of the sbinfo->free_blocks counter.  This will be used by
the next patch in the series.

Signed-off-by: Adam Litke <agl@us.ibm.com>
Cc: Ken Chen <kenchen@google.com>
Cc: Andy Whitcroft <apw@shadowen.org>
Cc: Dave Hansen <haveblue@us.ibm.com>
Cc: David Gibson <hermes@gibson.dropbear.id.au>
Cc: William Lee Irwin III <wli@holomorphy.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Adam Litke 2007-11-14 16:59:41 -08:00 committed by Linus Torvalds
parent 2fc39cec6a
commit 9a119c056d
3 changed files with 9 additions and 9 deletions
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10
fs/hugetlbfs/inode.c
View file

@ -858,15 +858,15 @@ out_free:
return -ENOMEM;
}
int hugetlb_get_quota(struct address_space *mapping)
int hugetlb_get_quota(struct address_space *mapping, long delta)
{
int ret = 0;
struct hugetlbfs_sb_info *sbinfo = HUGETLBFS_SB(mapping->host->i_sb);
if (sbinfo->free_blocks > -1) {
spin_lock(&sbinfo->stat_lock);
if (sbinfo->free_blocks > 0)
sbinfo->free_blocks--;
if (sbinfo->free_blocks - delta >= 0)
sbinfo->free_blocks -= delta;
else
ret = -ENOMEM;
spin_unlock(&sbinfo->stat_lock);
@ -875,13 +875,13 @@ int hugetlb_get_quota(struct address_space *mapping)
return ret;
}
void hugetlb_put_quota(struct address_space *mapping)
void hugetlb_put_quota(struct address_space *mapping, long delta)
{
struct hugetlbfs_sb_info *sbinfo = HUGETLBFS_SB(mapping->host->i_sb);
if (sbinfo->free_blocks > -1) {
spin_lock(&sbinfo->stat_lock);
sbinfo->free_blocks++;
sbinfo->free_blocks += delta;
spin_unlock(&sbinfo->stat_lock);
}
}

4
include/linux/hugetlb.h
View file

@ -165,8 +165,8 @@ static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb)
extern const struct file_operations hugetlbfs_file_operations;
extern struct vm_operations_struct hugetlb_vm_ops;
struct file *hugetlb_file_setup(const char *name, size_t);
int hugetlb_get_quota(struct address_space *mapping);
void hugetlb_put_quota(struct address_space *mapping);
int hugetlb_get_quota(struct address_space *mapping, long delta);
void hugetlb_put_quota(struct address_space *mapping, long delta);
static inline int is_file_hugepages(struct file *file)
{

4
mm/hugetlb.c
View file

@ -132,7 +132,7 @@ static void free_huge_page(struct page *page)
}
spin_unlock(&hugetlb_lock);
if (mapping)
hugetlb_put_quota(mapping);
hugetlb_put_quota(mapping, 1);
set_page_private(page, 0);
}
@ -390,7 +390,7 @@ static struct page *alloc_huge_page(struct vm_area_struct *vma,
struct page *page;
struct address_space *mapping = vma->vm_file->f_mapping;
if (hugetlb_get_quota(mapping))
if (hugetlb_get_quota(mapping, 1))
return ERR_PTR(-VM_FAULT_SIGBUS);
if (vma->vm_flags & VM_MAYSHARE)