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Re: PPC needs lots more stack space in rawhide??



On Wed, 2008-01-09 at 11:11 -0500, Tom Lane wrote:
> Dennis Gilmore <dennis ausil us> writes:
> > On Wednesday 09 January 2008, David Woodhouse wrote:
> >> On Tue, 2008-01-08 at 16:28 -0500, Tom Lane wrote:
> >>> ... Has gcc started making PPC stack frames a lot
> >>> larger than before?  Maybe glibc has gotten more stack-hungry?  I'd
> >>> guess on the problem being in gettext() or related code, if it is a
> >>> glibc change, but I haven't tracked it down exactly.
> >> 
> >> For a while we used 64KiB pages on ppc64, because IBM insisted on it in
> >> RHEL5 and I didn't notice we'd done the same stupid thing in Fedora. I
> >> believe it was like that in FC6 but I fixed it again for F7.
> >> 
> >> Is it possible that the kernel on the build machines is now similarly
> >> afflicted?
> 
> > The build system when refreshed in December got updates to RHEL5   so are all
> > running RHEL5 kernels.  they do have one extra patch for a bug in tux.
> 
> Interesting, but would that affect the rate at which userland code
> consumes stack space?

It'll certainly affect the way it _allocates_ stack space.

> Since posting, I've verified that it still fails at STACK_MIN_SIZE = 48K,

That's still less than a single page. Did you try 64KiB or 128KiB?

-- 
dwmw2


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