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authorKen Chen <kenchen@google.com>2008-01-14 03:55:19 -0500
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-01-14 11:52:23 -0500
commit68842c9b94560e647e8e7cc75cbb3dbe59f6fcb5 (patch)
tree58220ff2840a62155d3e7f934bc39e4cea673b39 /mm/hugetlb.c
parent747d016e7e25e216b31022fe2b012508d99fb682 (diff)
hugetlbfs: fix quota leak
In the error path of both shared and private hugetlb page allocation, the file system quota is never undone, leading to fs quota leak. Fix them up. [akpm@linux-foundation.org: cleanup, micro-optimise] Signed-off-by: Ken Chen <kenchen@google.com> Acked-by: Adam Litke <agl@us.ibm.com> Cc: David Gibson <david@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>
Diffstat (limited to 'mm/hugetlb.c')
-rw-r--r--mm/hugetlb.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 7224a4f0710..e0fda156f02 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -418,9 +418,14 @@ static struct page *alloc_huge_page_private(struct vm_area_struct *vma,
418 if (free_huge_pages > resv_huge_pages) 418 if (free_huge_pages > resv_huge_pages)
419 page = dequeue_huge_page(vma, addr); 419 page = dequeue_huge_page(vma, addr);
420 spin_unlock(&hugetlb_lock); 420 spin_unlock(&hugetlb_lock);
421 if (!page) 421 if (!page) {
422 page = alloc_buddy_huge_page(vma, addr); 422 page = alloc_buddy_huge_page(vma, addr);
423 return page ? page : ERR_PTR(-VM_FAULT_OOM); 423 if (!page) {
424 hugetlb_put_quota(vma->vm_file->f_mapping, 1);
425 return ERR_PTR(-VM_FAULT_OOM);
426 }
427 }
428 return page;
424} 429}
425 430
426static struct page *alloc_huge_page(struct vm_area_struct *vma, 431static struct page *alloc_huge_page(struct vm_area_struct *vma,
@@ -1206,8 +1211,10 @@ int hugetlb_reserve_pages(struct inode *inode, long from, long to)
1206 if (hugetlb_get_quota(inode->i_mapping, chg)) 1211 if (hugetlb_get_quota(inode->i_mapping, chg))
1207 return -ENOSPC; 1212 return -ENOSPC;
1208 ret = hugetlb_acct_memory(chg); 1213 ret = hugetlb_acct_memory(chg);
1209 if (ret < 0) 1214 if (ret < 0) {
1215 hugetlb_put_quota(inode->i_mapping, chg);
1210 return ret; 1216 return ret;
1217 }
1211 region_add(&inode->i_mapping->private_list, from, to); 1218 region_add(&inode->i_mapping->private_list, from, to);
1212 return 0; 1219 return 0;
1213} 1220}