[PATCH v2 0/7] fix s_umount thaw/write and journal deadlock

From: Kamal Mostafa
Date: Thu Dec 08 2011 - 13:05:17 EST


Thanks everyone for the feedback. Here's [PATCH v2], with these notable
changes since [PATCH 0/5 resend]:
- made bisect-safe "Freeze and thaw the journal on ext4 freeze"
- functional change: allow read-only quota subcmds when frozen
- added "VFS: Rename and refactor writeback_inodes_sb_if_idle"
- split-out "VFS: Avoid read-write deadlock in try_to_writeback_inodes_sb"
- split-out "VFS: Document s_frozen state through freeze_super"
- dropped "VFS: Rename vfs_check_frozen()"

-----

This set of filesystem freeze/thaw deadlock patches is submitted on
behalf of the authors, Kamal Mostafa, Surbhi Palande and Valerie Aurora.
The patches fix the bug:

BugLink: https://bugs.launchpad.net/bugs/897421

Kamal Mostafa (1):
VFS: Rename and refactor writeback_inodes_sb_if_idle

Surbhi Palande (2):
Adding support to freeze and unfreeze a journal
Freeze and thaw the journal on ext4 freeze

Valerie Aurora (4):

VFS: Fix s_umount thaw/write deadlock
VFS: Avoid read-write deadlock in try_to_writeback_inodes_sb
VFS: Document s_frozen state through freeze_super
Documentation: Correct s_umount state for freeze_fs/unfreeze_fs

Documentation/filesystems/Locking | 4 +-
fs/btrfs/extent-tree.c | 2 +-
fs/ext4/inode.c | 2 +-
fs/ext4/super.c | 13 +++++-----
fs/fs-writeback.c | 46 +++++++++++++++++++++---------------
fs/jbd2/journal.c | 1 +
fs/jbd2/transaction.c | 42 +++++++++++++++++++++++++++++++++
fs/quota/quota.c | 21 ++++++++++++++++-
fs/super.c | 26 +++++++++++++++++++++
fs/sync.c | 4 +-
include/linux/fs.h | 7 +++++-
include/linux/jbd2.h | 7 +++++
include/linux/writeback.h | 4 +-
13 files changed, 143 insertions(+), 36 deletions(-)

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