hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

xfs: disable map_sync for async flush 

Dont support 'MAP_SYNC' with non-DAX files and DAX files
with asynchronous dax_device. Virtio pmem provides
asynchronous host page cache flush mechanism. We don't
support 'MAP_SYNC' with virtio pmem and xfs.

Signed-off-by: Pankaj Gupta <pagupta@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Pankaj Gupta 2019-07-05 19:33:28 +05:30 committed by Dan Williams
parent e46bfc3f03
commit b21fec4140
1 changed files with 6 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
fs/xfs/xfs_file.c
View File

@ -1203,11 +1203,14 @@ xfs_file_mmap(
struct file *filp,
struct vm_area_struct *vma)
{
struct dax_device *dax_dev;
dax_dev = xfs_find_daxdev_for_inode(file_inode(filp));
/*
* We don't support synchronous mappings for non-DAX files. At least
* until someone comes with a sensible use case.
* We don't support synchronous mappings for non-DAX files and
* for DAX files if underneath dax_device is not synchronous.
*/
if (!IS_DAX(file_inode(filp)) && (vma->vm_flags & VM_SYNC))
if (!daxdev_mapping_supported(vma, dax_dev))
return -EOPNOTSUPP;
file_accessed(filp);