[PATCH] xfs: prevent stack overflows from page cache allocation

[Dave Chinner]

On Thu, Oct 24, 2013 at 11:41:15AM -0500, Ben Myers wrote:
> Hey,
> 
> On Thu, Oct 24, 2013 at 08:42:20AM -0700, Christoph Hellwig wrote:
> > On Thu, Oct 24, 2013 at 09:37:51PM +1100, Dave Chinner wrote:
> > > Sure, if you want to. But doing that shouldn't prevent this fix from
> > > being committed in the mean time, especially as other filesystems
> > > already use this method for avoiding these problems.
> > 
> > I'd much prefer aiming for the proper fix first.  If for some reason we
> > can't get it done in time the workaround can be applied.
> 
> Dave probably has a customer waiting on this.

Obviously. And being a kernel where we have a fixed ABI, we can't
backport any fix that changes core code.

> If pulling this in will make a
> proper fix more difficult to do I can understand keeping the patch out.

It doesn't make a proper fix any harder - removing 2 lines of code
is trivial.

> Otherwise, can't we just remove this along with the other filesystems'
> equivalent code when the proper fix is committed?

Yes, we can.

Cheers,

Dave.
-- 
Dave Chinner
david at fromorbit.com