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Subject: Re: ext4 features
From: Trond Myklebust <trond.myklebust@fys.uio.no>
To: Bill Davidsen <davidsen@tmr.com>
Cc: "J. Bruce Fields" <bfields@fieldses.org>, Theodore Tso <tytso@mit.edu>,
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Date: Mon, 10 Jul 2006 16:08:55 -0400
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On Sat, 2006-07-08 at 17:04 -0400, Bill Davidsen wrote:
> No, I didn't quite mean a manual touch, but a system call to "close and 
> set time to high resolution" for files where time uniformity is 
> important. Consider that in most cases the inodes times are set by the 
> host machine clock, which I close the change reflects the fileserving 
> host idea of time. If there were a call to close a file and set the 
> times like touch, then that could be used, for both local and network files.

Close should never update the time since that would be a violation of
POSIX rules. Normally, an NFS client will never need to update the time:
RPC calls like WRITE, READ and SETATTR will automatically do it for us
whenever necessary.

Cheers,
  Trond