Re: New feature

Richard B. Johnson (
Tue, 23 Sep 1997 21:49:12 -0400 (EDT)

On Tue, 23 Sep 1997, David S. Miller wrote:

> Date: Tue, 23 Sep 1997 18:31:26 -0400 (EDT)
> From: "Richard B. Johnson" <>
> o Now perform `sync`. Every directory entry will be updated, causing
> an enormonous amount of wasted CPU cycles and disk activity!
> Sync should have done nothing. The disk was never written.
> If you execute `ls -R /`, the entire directory structure is again
> read from the physical media. Not nice.
> The ATIME updates dirty all the inodes.
> Later,
> David "Sparc" Miller
Correct! Now, is a directory access a file access? I don't think it
should be. If it is, the new directory caching code was a lot of work
that will be wasted in real-world applications such as a compile using
`make`, etc. I think that only the directory "files" have been accessed,
not every file. 'ls -la --time=atime` shows every file on my disk as
having been accessed after `ls -R /`, which, in fact, has not happened.
Only the directory files have been accessed.

Richard B. Johnson
Analogic Corporation
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