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authorChen, Kenneth W <kenneth.w.chen@intel.com>2006-10-11 04:20:46 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-11 14:14:15 -0400
commit502717f4e112b18d9c37753a32f675bec9f2838b (patch)
tree90e674229bbd7caa05e740dfe719cf8749d0eb27 /fs/hugetlbfs
parent97c7801cd5b0bb6a38c16108a496235474dc6310 (diff)
[PATCH] hugetlb: fix linked list corruption in unmap_hugepage_range()
commit fe1668ae5bf0145014c71797febd9ad5670d5d05 causes kernel to oops with libhugetlbfs test suite. The problem is that hugetlb pages can be shared by multiple mappings. Multiple threads can fight over page->lru in the unmap path and bad things happen. We now serialize __unmap_hugepage_range to void concurrent linked list manipulation. Such serialization is also needed for shared page table page on hugetlb area. This patch will fixed the bug and also serve as a prepatch for shared page table. Signed-off-by: Ken Chen <kenneth.w.chen@intel.com> Cc: Hugh Dickins <hugh@veritas.com> Cc: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/hugetlbfs')
-rw-r--r--fs/hugetlbfs/inode.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 5e03b2f67b93..4ee3f006b861 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -293,7 +293,7 @@ hugetlb_vmtruncate_list(struct prio_tree_root *root, unsigned long h_pgoff)
293 if (h_vm_pgoff >= h_pgoff) 293 if (h_vm_pgoff >= h_pgoff)
294 v_offset = 0; 294 v_offset = 0;
295 295
296 unmap_hugepage_range(vma, 296 __unmap_hugepage_range(vma,
297 vma->vm_start + v_offset, vma->vm_end); 297 vma->vm_start + v_offset, vma->vm_end);
298 } 298 }
299} 299}