Commit 9a119c05 authored by Adam Litke's avatar Adam Litke Committed by Linus Torvalds
Browse files

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: default avatarAdam 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: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 2fc39cec

fs/hugetlbfs/inode.c

+5 −5
Original line number Diff line number Diff line
@@ -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);

	}

}

include/linux/hugetlb.h

+2 −2
Original line number Diff line number Diff line
@@ -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)

{

mm/hugetlb.c

+2 −2
Original line number Diff line number Diff line
@@ -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)

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