directories. This has runtime constraints and limitations that are
described in 6) below.
- 6. When changing the S_DAX policy via toggling the persistent FS_XFLAG_DAX flag,
- the change in behaviour for existing regular files may not occur
- immediately. If the change must take effect immediately, the administrator
- needs to:
-
- a) stop the application so there are no active references to the data set
- the policy change will affect
-
- b) evict the data set from kernel caches so it will be re-instantiated when
- the application is restarted. This can be achieved by:
-
- i. drop-caches
- ii. a filesystem unmount and mount cycle
- iii. a system reboot
+ 6. When changing the S_DAX policy via toggling the persistent FS_XFLAG_DAX
+ flag, the change to existing regular files won't take effect until the
+ files are closed by all processes.
Details