[v2,0/3] Prevent ->map_pages from sleeping

Message

Matthew Wilcox (Oracle) March 27, 2023, 5:45 p.m. UTC

In preparation for a larger patch series which will handle (some, easy)
page faults protected only by RCU, change the two filesystems which have
sleeping locks to not take them and hold the RCU lock around calls to
->map_page to prevent other filesystems from adding sleeping locks.

v2:
 - Add tags from David Howells
 - Go into more detail about the locking in the XFS patch

Matthew Wilcox (Oracle) (3):
  xfs: Remove xfs_filemap_map_pages() wrapper
  afs: Split afs_pagecache_valid() out of afs_validate()
  mm: Hold the RCU read lock over calls to ->map_pages

 Documentation/filesystems/locking.rst |  4 ++--
 fs/afs/file.c                         | 14 ++------------
 fs/afs/inode.c                        | 27 +++++++++++++++++++--------
 fs/afs/internal.h                     |  1 +
 fs/xfs/xfs_file.c                     | 17 +----------------
 mm/memory.c                           | 11 ++++++++---
 6 files changed, 33 insertions(+), 41 deletions(-)