diff options
Diffstat (limited to 'fs/xfs/xfs_file.c')
| -rw-r--r-- | fs/xfs/xfs_file.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 3041b44e38c6..e93bacbd49ae 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -374,6 +374,7 @@ xfs_dio_write_end_io( struct inode *inode = file_inode(iocb->ki_filp); struct xfs_inode *ip = XFS_I(inode); loff_t offset = iocb->ki_pos; + unsigned int nofs_flag; int error = 0; trace_xfs_end_io_direct_write(ip, offset, size); @@ -390,10 +391,17 @@ xfs_dio_write_end_io( */ XFS_STATS_ADD(ip->i_mount, xs_write_bytes, size); + /* + * We can allocate memory here while doing writeback on behalf of + * memory reclaim. To avoid memory allocation deadlocks set the + * task-wide nofs context for the following operations. + */ + nofs_flag = memalloc_nofs_save(); + if (flags & IOMAP_DIO_COW) { error = xfs_reflink_end_cow(ip, offset, size); if (error) - return error; + goto out; } /* @@ -402,8 +410,10 @@ xfs_dio_write_end_io( * earlier allows a racing dio read to find unwritten extents before * they are converted. */ - if (flags & IOMAP_DIO_UNWRITTEN) - return xfs_iomap_write_unwritten(ip, offset, size, true); + if (flags & IOMAP_DIO_UNWRITTEN) { + error = xfs_iomap_write_unwritten(ip, offset, size, true); + goto out; + } /* * We need to update the in-core inode size here so that we don't end up @@ -425,6 +435,8 @@ xfs_dio_write_end_io( spin_unlock(&ip->i_flags_lock); } +out: + memalloc_nofs_restore(nofs_flag); return error; } |