diff options
| -rw-r--r-- | fs/ext4/inode.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 17802a96af9..5c0d17066f4 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -5286,12 +5286,21 @@ int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) else len = PAGE_CACHE_SIZE; + lock_page(page); + /* + * return if we have all the buffers mapped. This avoid + * the need to call write_begin/write_end which does a + * journal_start/journal_stop which can block and take + * long time + */ if (page_has_buffers(page)) { - /* return if we have all the buffers mapped */ if (!walk_page_buffers(NULL, page_buffers(page), 0, len, NULL, - ext4_bh_unmapped)) + ext4_bh_unmapped)) { + unlock_page(page); goto out_unlock; + } } + unlock_page(page); /* * OK, we need to fill the hole... Do write_begin write_end * to do block allocation/reservation.We are not holding |