Re: [PATCH v2] writeback: avoid race when update bandwidth

Fengguang Wu
2012-06-15T00:30:06Z

On Fri, Jun 15, 2012 at 10:06:33AM +1000, Dave Chinner wrote:
> On Thu, Jun 14, 2012 at 10:00:06PM +0800, Fengguang Wu wrote:
> > On Thu, Jun 14, 2012 at 12:05:59PM +1000, Dave Chinner wrote:
> > > On Wed, Jun 13, 2012 at 08:14:34PM +0800, Fengguang Wu wrote:
> > I wonder if anyone has a simple script for sorting lock_stat output
> > based on that (and perhaps other selectable) criterion? It should be
> > possible to write on myself, but still.. ;-)
> >
> > Default lock_stat output is sorted by absolute number of contentions.
>
> No that I know of. The default is pretty sane, because a highly
> contended lock that is causing performance problems will always show
> up near the top. If it's not in the top 10, then it's usually not
> worth worrying about until you've dealt with the those above it....

Okay, thanks for the tip!

Thanks,
Fengguang