Hello, My apologies on this delay... On 8/28/23 1:53 AM, Chengen Du wrote:
Add an option that triggers the clearing of the file access cache as soon as the cache timestamp becomes older than the user's login time. Signed-off-by: Chengen Du <chengen.du@xxxxxxxxxxxxx>
On a 6.7-rc0 kernel I'm getting "nfs: Unknown parameter 'fasc'" error... was this never implemented? steved.
--- utils/mount/nfs.man | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/utils/mount/nfs.man b/utils/mount/nfs.man index 9b4bc9c9..2ac7b4ad 100644 --- a/utils/mount/nfs.man +++ b/utils/mount/nfs.man @@ -608,6 +608,19 @@ option is not specified, the default behavior depends on the kernel version, but is usually equivalent to .BR "xprtsec=none" . +.TP 1.5i +.BI fasc +Triggers the clearing of the file access cache as soon as the cache +timestamp becomes older than the user's login time. It is supported +in kernels 6.4 and later. +.IP +NFS servers often refresh their users' group membership at their +own cadence, which means the NFS client's file access cache can +become stale if the user's group membership changes on the server +after they've logged in on the client. To align with the principles +of the POSIX design, which only refreshes the user's supplementary +group information upon login, the mechanism uses the user's login +time to determine whether the file access cache needs to be refreshed. .SS "Options for NFS versions 2 and 3 only" Use these options, along with the options in the above subsection, for NFS versions 2 and 3 only.
