[Cluster-devel] [GFS2 PATCH 0/3] gfs2: Fix 'dont sleep' GPF from vfs

[Bob Peterson <rpeterso@redhat.com>]

This series of patches fixes problems discovered while testing patch
34244d711dea568f4a42c5b0d6b3d620f8cb6971 "Don't sleep during glock hash walk"
with various combinations of these xfstests under low memory conditions:

env SCRATCH_DEV="/dev/sda" SCRATCH_MNT="/mnt/scratch" TEST_DEV="/dev/sdb" TEST_DIR="/mnt/gfs2" ./check generic/076 generic/081 generic/224

and:

env SCRATCH_DEV="/dev/sda" SCRATCH_MNT="/mnt/scratch" TEST_DEV="/dev/sdb" TEST_DIR="/mnt/gfs2" ./check generic/0{34,35,38}

The bug led to "general protection fault, probably for non-canonical address"
errors called from either move_to_new_page() or shrink_page_list().
It was always a reference to an invalid address space pointer, page->mapping.

Bob Peterson (3):
  gfs2: Free rd_bits later in gfs2_clear-rgrpd to fix use-after-free
  gfs2: Add missing truncate_inode_pages_final for sd_aspace
  gfs2: Use filemap_fdatawrite_range for gfs2_meta_sync

 fs/gfs2/lops.c  | 14 +++++++++++---
 fs/gfs2/rgrp.c  |  2 +-
 fs/gfs2/super.c |  1 +
 3 files changed, 13 insertions(+), 4 deletions(-)

-- 
2.26.2