Re: [RFC, patch 1/2] Allow up to 1GB logs in mkfs.xfs

[Lachlan McIlroy <lachlan@xxxxxxx>]

David Chinner wrote:
> On Fri, Feb 22, 2008 at 01:44:38PM +1100, Niv Sardi wrote:
> > David Chinner <dgc@xxxxxxx> writes:
> > > Increase the maximum log size supported by mkfs.
> ....
> > > Hence logs larger than 2^30 will not work without kernel
> > > modifications.  Therefore this change is limited to increasing the
> > > log size to what we can currently support in kernel space with
> > > needing kernel modifications.
> > I'm glad you got time to get around this, I didn't include it in the
> > first batch as I was told it 'broke things'.
> Right. There's all sorts of nasties lurking if we go over 1GB in
> size, but AFAICT up to 1GB is OK. There's still lots of validation
> needing to be done - that's why this is an "RFC" and not something
> ready for checkin yet. That's where more eye's and testers are
> handy...
Dave, have you run any tests to see if we get any speed-ups with
this change?