Re: 2.5 merge candidate list, final version. (End of "crunch time"series.)

Chris Mason
2002-10-30T17:00:56Z

On Wed, 2002-10-30 at 04:35, Andrew Morton wrote:
> Jeff Garzik wrote:
> >
> > Hans Reiser wrote:
> >
> > > We are going to submit a patch appropriate for inclusion as an
> > > experimental FS on Halloween. I hope you will forgive our pushing
> > > the limit timewise, it is not by choice, but the algorithms we used to
> > > more than double reiserfs V3 performance were, quite frankly, hard to
> > > code.
> >
> > Does your merge change the core code at all? Does it add new syscalls?
> >
>
> Their changes are tiny, and sensible. See
> http://www.namesys.com/snapshots/2002.10.29/
>
> But I'd like to ask about the status of reiser3 support.
>
> Chris had patches *ages* ago to convert it to use direct-to-BIO for
> reads, and writes should be done as well. reiserfs3 is still using
> buffer-head-based IO for bulk reads and writes. That's a 25-30% hit
> in CPU cost, and all the old ZONE_NORMAL-full-of-buffer_heads
> problems.
>
> Any plans to get that work finished off?

Very much so, but I wanted it on top of the data journaling stuff to
make porting that easier. But, in the interest in getting something
more stable and faster out the door asap, I'll pull just the
direct-to-BIO stuff out.

-chris