[Linux-cluster] Re: [PATCH 00/14] GFS

[Arjan van de Ven <arjan infradead org>]

On Wed, 2005-08-03 at 11:56 +0800, David Teigland wrote:
> The point is you can define GFS2_ENDIAN_BIG to compile gfs to be BE
> on-disk instead of LE which is another useful way to verify endian
> correctness.

that sounds wrong to be a compile option. If you really want to deal
with dual disk endianness it really ought to be a runtime one (see jffs2
for example).



> > * Why use your own journalling layer and not say ... jbd ?
> 
> Here's an analysis of three approaches to cluster-fs journaling and their
> pros/cons (including using jbd):  http://tinyurl.com/7sbqq
> 
> > * +	while (!kthread_should_stop()) {
> > +		gfs2_scand_internal(sdp);
> > +
> > +		set_current_state(TASK_INTERRUPTIBLE);
> > +		schedule_timeout(gfs2_tune_get(sdp, gt_scand_secs) * HZ);
> > +	}
> > 
> > you probably really want to check for signals if you do interruptible sleeps
> 
> I don't know why we'd be interested in signals here.

well.. because if you don't your schedule_timeout becomes a nop when you
get one, which makes your loop a busy waiting one.