Re: ReiserFS / 2.4.6 / Data Corruption

From: Daniel Phillips (
Date: Fri Jul 27 2001 - 11:30:22 EST

On Friday 27 July 2001 17:33, Hans Reiser wrote:
> Daniel Phillips wrote:
> > On Friday 27 July 2001 16:18, Joshua Schmidlkofer wrote:
> > > I've almost quit using reiser, because everytime I have a power
> > > outage, the last 2 or three files that I've editted, even ones
> > > that I haven't touched in a while, will usually be hopelessly
> > > corrupted.
> >
> > My early flush patch will fix this, or at least it will if I get
> > together with the ReiserFS guys and figure out how to integrate
> > their flushing mechanism with the standard bdflush. Or they could
> > incorporate the ideas from my early flush in their own flush
> > daemon, though generalizing the standard flush would have more
> > value in the long run.
> Can you describe early flush?

The idea is to do what amounts to a sync within a tenth of a second of
disk bandwidth usage falling below a certain threshhold.

The original posts/patches are here:

    [RFC] Early flush (was: spindown)
    [RFC] Early flush: new, improved (updated)

and there are long threads attached to each of them. The clearest
explanation is probably Jonathan Corbet's writeup on lwn:

(Thanks, Jonathan, I often get the feeling I understand what I actually
did only *after* reading your writeups:-)

The second of the two patches needs more work - I think I goofed on
some needed "volatile" handling, see the current flam^H^H^H^H thread
about that.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

This archive was generated by hypermail 2b29 : Tue Jul 31 2001 - 21:00:33 EST