Description of problem: The nfs option fsc is no longer available for nfsv3 mount points after upgrading from nfs-utils-1.0.9-35z.el5_2 to nfs-utils-1.0.9-40.el5. This only becomes apparent after a reboot of the system, when the mount points no longer will mount. I can't find any documentation on the web for this new path (nfs-utils-1.0.9-40.el5). Thanks. - Mark Version-Release number of selected component (if applicable): How reproducible: Steps to Reproduce: 1. 2. 3. Actual results: Expected results: Additional info:
Correction, the fsc option is no longer available for nfs for any version, not just v3. We just tried it for v4 and the mount command also does not recognize it: [root@cmodws09 ~]# mkdir /foo [root@cmodws09 ~]# mount -o fsc -t nfs4 test:/ /foo unknown nfs mount option: fsc [root@cmodws09 ~]# mount -o fsc test:/ /foo Unsupported nfs mount option: fsc
Can I get someone to respond to this reported problem? Thanks! - Mark
Sorry for the delay.... FS-Cache was technology preview, which meant we were not going to guarantee any support and had the right to disable it at anytime. Since the technology never was accepted into the Linux mainline kernel (what we refer to as upstream), it was decided to disable the technology in the RHEL 5.3 release. That's the bad news... The good news is there is a very good chance FS-Cache technology will be accepted in mainline kernel very soon. Which means there is a good chance the technology will reappear in RHEL 6 The latest code release can be found on the 'linux-mm' branch upstream NFS maintainter's git tree which can be found at: git://git.linux-nfs.org/pub/linux/nfs-2.6.git
Thanks for the info! - Mark
Just for the sake of completeness : It's not the userspace tools which no longer permit using the option, it's apparently the RHEL 5.3 kernel (2.6.18-128.el5+) which no longer supports the feature. Too bad, really.