From mboxrd@z Thu Jan 1 00:00:00 1970 From: Adam Litke Subject: [PATCH 4/5] hugetlb: Allow bulk updating in hugetlb_*_quota() Date: Tue, 30 Oct 2007 13:46:38 -0700 Message-Id: <20071030204638.16585.3618.stgit@kernel> In-Reply-To: <20071030204554.16585.80588.stgit@kernel> References: <20071030204554.16585.80588.stgit@kernel> Content-Type: text/plain; charset=utf-8; format=fixed Content-Transfer-Encoding: 8bit Sender: owner-linux-mm@kvack.org Return-Path: To: Andrew Morton Cc: linux-mm@kvack.org, linux-kernel@kvack.org, Ken Chen , Andy Whitcroft , Dave Hansen , Adam Litke List-ID: 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 --- fs/hugetlbfs/inode.c | 10 +++++----- include/linux/hugetlb.h | 4 ++-- mm/hugetlb.c | 4 ++-- 3 files changed, 9 insertions(+), 9 deletions(-) diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index 5f4e888..449ba8b 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 ea0f50b..770dbed 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 5eacee8..deba411 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) -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org