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From: Yafang Shao <>
Cc:,,, Yafang Shao <>
Subject: [PATCH v4 0/2] void xfs transaction reservation recursion
Date: Sat,  1 Aug 2020 11:46:30 -0400
Message-ID: <> (raw)

From: Yafang Shao <>

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. 

- 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
  xfs: avoid transaction reservation recursion

Cc: Dave Chinner <>
Cc: Christoph Hellwig <>
Cc: Michal Hocko <>
Cc: Darrick J. Wong <>
Cc: Matthew Wilcox <>

 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(-)


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Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-01 15:46 Yafang Shao [this message]
2020-08-01 15:46 ` [PATCH v4 1/2] xfs: avoid double restore PF_MEMALLOC_NOFS if transaction reservation fails Yafang Shao
2020-08-01 15:46 ` [PATCH v4 2/2] xfs: avoid transaction reservation recursion Yafang Shao

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