After commit 77573fa310d9 ("fs: Kill DCACHE_DONTCACHE dentry even if
DCACHE_REFERENCED is set"), changes to DAX policy will take effect
as soon as all references to this file are gone.Update the documentation accordingly. Signed-off-by: Hao Li <[email protected]> --- Documentation/filesystems/dax.txt | 15 ++------------- 1 file changed, 2 insertions(+), 13 deletions(-) diff --git a/Documentation/filesystems/dax.txt b/Documentation/filesystems/dax.txt index 8fdb78f3c6c9..a5af22831087 100644 --- a/Documentation/filesystems/dax.txt +++ b/Documentation/filesystems/dax.txt @@ -84,19 +84,8 @@ Summary 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 + the change to existing regular file won't take effect until the file is closed + by all processes or all processes referencing the file are stopped. Details -- 2.29.2
