[ros-kernel] Re: Filesystem cache

[Phillip S. <ps...@cf...>]

I'm not sure, but I think that sometimes the directory data is cached, such 
as when opening files or changing directories, it does not seem to read the 
disk, but when doing a simple dir command, there is intense disk IO and 
each file in the directory is printed one at a time, very slowly, as if it 
were still reading in a sector from the disk for each file found in the 
directory.

At 11:52 AM 9/30/2001 +0100, you wrote:
>On Sat, Sep 29, 2001 at 09:54:15PM -0700, Rex Jolliff wrote:
> >
> > I thought I was done with this.  Perhaps I missed something, or subsequent
> > changes
> > altered the behaviour of the caching code.  I am not currently working on
> > this.  I seem
> > to remember that someone else picked up the vfat driver.  Perhaps this
> > person will
> > look into this.  If not, I can take a look.
> >
>The vfat directory read code uses the interfaces for reading file data so
>it does go through the cache but it doesn't operate directly on the cached
>data so it is less efficent.

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