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authorAdam Litke <agl@us.ibm.com>2007-11-14 16:59:41 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-11-14 18:45:40 -0800
commit9a119c056dc2a9970901954a6d561d50a95e528d (patch)
tree22ca1f97f18f8a788757825bd4623d52d97a5abb
parent2fc39cec6a9b5b41727d3386b780b69422a15152 (diff)
hugetlb: allow bulk updating in hugetlb_*_quota()
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>
-rw-r--r--fs/hugetlbfs/inode.c10
-rw-r--r--include/linux/hugetlb.h4
-rw-r--r--mm/hugetlb.c4
3 files changed, 9 insertions, 9 deletions
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 6513f5655861..09ee07f02663 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -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);
}
}
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index e22368656b38..8104e5af75ab 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -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)
{
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index bc12b0adfa87..1e317465ecd1 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -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)