[v3,0/7] gfs2: Fix mmap + page fault deadlocks

Message

Andreas Gruenbacher July 23, 2021, 8:58 p.m. UTC

Hi Linus et al.,

here's an update of my gfs2 mmap + page fault fixes (against -rc2).
>From my point of view,

  * these two are ready and need to be looked at by Al:

    iov_iter: Introduce fault_in_iov_iter helper
    iov_iter: Introduce noio flag to disable page faults

  * these two need to be reviewed by Christoph at least:

    iomap: Fix iomap_dio_rw return value for user copies
    iomap: Support restarting direct I/O requests after user copy failures

Thanks a lot,
Andreas

Andreas Gruenbacher (7):
  iov_iter: Introduce fault_in_iov_iter helper
  gfs2: Add wrapper for iomap_file_buffered_write
  gfs2: Fix mmap + page fault deadlocks for buffered I/O
  iomap: Fix iomap_dio_rw return value for user copies
  iomap: Support restarting direct I/O requests after user copy failures
  iov_iter: Introduce noio flag to disable page faults
  gfs2: Fix mmap + page fault deadlocks for direct I/O

 fs/gfs2/file.c       | 77 ++++++++++++++++++++++++++++++++++++++++----
 fs/iomap/direct-io.c | 13 ++++++--
 include/linux/mm.h   |  3 ++
 include/linux/uio.h  |  2 ++
 lib/iov_iter.c       | 62 ++++++++++++++++++++++++++++++++---
 mm/gup.c             | 68 ++++++++++++++++++++++++++++++++++++++
 6 files changed, 211 insertions(+), 14 deletions(-)