Code was added to remove_inode_hugepages that will unmap a page if it is mapped. i_mmap_lock_write() must be taken during the call to hugetlb_vmdelete_list(). This is to prevent mappings(vmas) from being added or deleted while the list of vmas is being examined.
Signed-off-by: Mike Kravetz <[email protected]> --- fs/hugetlbfs/inode.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index f25b72f..0f3999d 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -428,9 +428,11 @@ static void remove_inode_hugepages(struct inode *inode, loff_t lstart, * until we finish removing the page. */ if (page_mapped(page)) { + i_mmap_lock_write(mapping); hugetlb_vmdelete_list(&mapping->i_mmap, next * pages_per_huge_page(h), (next + 1) * pages_per_huge_page(h)); + i_mmap_unlock_write(mapping); } lock_page(page); -- 2.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
