Re: [Benchmark] AIM9 results

From: Andrew Morton (akpm@digeo.com)
Date: Mon Dec 16 2002 - 18:25:32 EST


Hans Reiser wrote:
>
> Andrew and Chris, are these changes in performance definitely due to VM
> changes (and not some difference I am not thinking of between 2.5 and
> 2.4 reiserfs code)?
>

aim9 is just doing

        for (lots)
                close(creat(filename))

ie: deleting a zero-length file.

So I changed inode_setattr() to not call into the filesystem
at all if i_size was not being altered. Not a very interesting
optimisation, but it was simple to do.

It seems that reiserfs_truncate() has a lot of setup overhead.
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