Messages in this thread | ![/](/images/icornerl.gif) | | Date | Fri, 31 Aug 2007 13:09:16 +0800 (WST) | From | Ian Kent <> | Subject | RE: recent nfs change causes autofs regression |
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On Fri, 31 Aug 2007, Trond Myklebust wrote:
> On Thu, 2007-08-30 at 16:44 -0700, Hua Zhong wrote: > > > How is the NFS client to know that these directories are disjoint, or > > > that no-one will ever create a hard link from one directory to another? > > > To my knowledge, the only way to ensure this is to put them on > > > different disk partitions. > > > > > > I don't know if all Unix systems have this issue, but I have been told > > > that Solaris at least has it. > > > > Does Solaris enforces this "mount with same options" as default? > > No. Solaris defaults to breaking cache consistency. > > > > > "working" as in "I can mount the directory and do my work". And there > > > > has never been any problems as far as I know. > > > > > > That is too narrow a definition: the minimum should be "everyone can > > > mount their directories and do their work". Your particular setup may > > > be safe, but that is why we have overrides: the default should be for the > > > kernel to be conservative, and to _tell_ users what it thinks is wrong. > > > > Every engineer in our organization mounts it too. No problem until now. > > I believe I've already explained why that isn't a sufficient metric. > What is your point? > > > It's not very conservative to suddenly change default behavior and break > > autofs mounts. There is not even one kernel message that "_tells_ user why > > it thinks it's wrong". It just silently fails. > > No it doesn't. It reports an error code to the caller. If autofs is > failing silently, then that is a bug in autofs: mount will report the > error to the user.
Actually, yes, it looks like I'm not logging mount errors at the correct log level. Oops.
Ian
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