Comment 24 for bug 396780

Thanks to git-bisect, I identified the following commit as the problem:
commit 936940a9c7e3d99b25859bf1ff140d8c2480183a
Merge: 09ce42d 1cbd20d
Author: Linus Torvalds <email address hidden>
Date: Wed Jun 24 10:03:12 2009 -0700

    Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6

    * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (23 commits)
      switch xfs to generic acl caching helpers
      helpers for acl caching + switch to those
      switch shmem to inode->i_acl
      switch reiserfs to inode->i_acl
      switch reiserfs to usual conventions for caching ACLs
      reiserfs: minimal fix for ACL caching
      switch nilfs2 to inode->i_acl
      switch btrfs to inode->i_acl
      switch jffs2 to inode->i_acl
      switch jfs to inode->i_acl
      switch ext4 to inode->i_acl
      switch ext3 to inode->i_acl
      switch ext2 to inode->i_acl
      add caching of ACLs in struct inode
      fs: Add new pre-allocation ioctls to vfs for compatibility with legacy xfs ioctls
      cleanup __writeback_single_inode
      ... and the same for vfsmount id/mount group id
      Make allocation of anon devices cheaper
      update Documentation/filesystems/Locking
      devpts: remove module-related code
      ...

Note that I'm using jfs so it could be related.