diff options
| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2014-07-07 10:17:56 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2014-07-07 10:17:56 +0200 |
| commit | f1615bbe9be4def59c3b3eaddb60722efeed16c2 (patch) | |
| tree | ca3020e65447576fc1826e819651e6ba072030b5 /fs/xfs/xfs_iops.c | |
| parent | cfb3c0ab0903abb6ea5215b37eebd9c2a1f057eb (diff) | |
| parent | cd3de83f147601356395b57a8673e9c5ff1e59d1 (diff) | |
Merge tag 'v3.16-rc4' into drm-intel-next-queued
Due to Dave's vacation drm-next hasn't opened yet for 3.17 so I
couldn't move my drm-intel-next queue forward yet like I usually do.
Just pull in the latest upstream -rc to unblock patch merging - I
don't want to needlessly rebase my current patch pile really and void
all the testing we've done already.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'fs/xfs/xfs_iops.c')
| -rw-r--r-- | fs/xfs/xfs_iops.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c index 36d630319a2..205613a0606 100644 --- a/fs/xfs/xfs_iops.c +++ b/fs/xfs/xfs_iops.c @@ -829,22 +829,34 @@ xfs_setattr_size( */ inode_dio_wait(inode); + /* + * Do all the page cache truncate work outside the transaction context + * as the "lock" order is page lock->log space reservation. i.e. + * locking pages inside the transaction can ABBA deadlock with + * writeback. We have to do the VFS inode size update before we truncate + * the pagecache, however, to avoid racing with page faults beyond the + * new EOF they are not serialised against truncate operations except by + * page locks and size updates. + * + * Hence we are in a situation where a truncate can fail with ENOMEM + * from xfs_trans_reserve(), but having already truncated the in-memory + * version of the file (i.e. made user visible changes). There's not + * much we can do about this, except to hope that the caller sees ENOMEM + * and retries the truncate operation. + */ error = -block_truncate_page(inode->i_mapping, newsize, xfs_get_blocks); if (error) return error; + truncate_setsize(inode, newsize); tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_SIZE); error = xfs_trans_reserve(tp, &M_RES(mp)->tr_itruncate, 0, 0); if (error) goto out_trans_cancel; - truncate_setsize(inode, newsize); - commit_flags = XFS_TRANS_RELEASE_LOG_RES; lock_flags |= XFS_ILOCK_EXCL; - xfs_ilock(ip, XFS_ILOCK_EXCL); - xfs_trans_ijoin(tp, ip, 0); /* |