Re: Does your change make find faster by changing where it is storedor where it is returned?

From: Hans Reiser (reiser@idiom.com)
Date: Mon Mar 06 2000 - 03:52:05 EST

Let me be careful here, are you saying then that you got a 2x speedup
by not changing where it was stored and only changing where it was returned,
and thereby reducing syscall overhead?

Hans

Jamie Lokier wrote:

> The file type is already stored in the directory for all filesystems
> that say "FULL SUPPORT".

>
> The patch changes where it is returned -- by not having to call stat(),
> the inode is not read from disk. As a bonus you reduce inode cache
> thrashing.
>
> For filesystems that store the inode in the directory itself, there is
> no saving in I/O.

> You may as well return the type info anyway because
> it reduces kernel inode cache thrashing and reduces the number of
> syscalls.
>
> enjoy,
> -- Jamie 

-- 
You can get ReiserFS at http://devlinux.org/namesys, and customizations and
industrial grade support at reiser@idiom.com.

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