From: Yafang Shao <shaoyafang@xxxxxxxxxxxxxx>
This patchset avoids transaction reservation recursion by reintroducing
the discarded PF_FSTRANS in a new way, suggested by Dave. In this new
implementation, two new helpers are introduced, which are
xfs_trans_context_{begin, end}, suggested by Christoph. And re-using the
task->journal_info to indicates whehter the task is in fstrans or not,
suggested by Willy.
v4:
- retitle from "xfs: introduce task->in_fstrans for transaction reservation recursion protection"
- reuse current->journal_info, per Willy
Yafang Shao (2):
xfs: avoid double restore PF_MEMALLOC_NOFS if transaction reservation
fails
xfs: avoid transaction reservation recursion
Cc: Dave Chinner <david@xxxxxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
fs/iomap/buffered-io.c | 4 ++--
fs/xfs/libxfs/xfs_btree.c | 2 ++
fs/xfs/xfs_aops.c | 3 +++
fs/xfs/xfs_linux.h | 19 +++++++++++++++++++
fs/xfs/xfs_trans.c | 21 +++++++++++++++------
5 files changed, 41 insertions(+), 8 deletions(-)
--
2.18.1
