linux-kernel - [PATCH v3 0/7] gfs2: Fix mmap + page fault deadlocks

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Date:   Fri, 23 Jul 2021 22:58:33 +0200
From:   Andreas Gruenbacher <agruenba@...hat.com>
To:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Christoph Hellwig <hch@...radead.org>,
        "Darrick J. Wong" <djwong@...nel.org>
Cc:     Jan Kara <jack@...e.cz>, Matthew Wilcox <willy@...radead.org>,
        cluster-devel@...hat.com, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, ocfs2-devel@....oracle.com,
        Andreas Gruenbacher <agruenba@...hat.com>
Subject: [PATCH v3 0/7] gfs2: Fix mmap + page fault deadlocks

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(-)

-- 
2.26.3