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



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?

Since posting, I've verified that it still fails at STACK_MIN_SIZE = 48K,
which is 300% of the setting that had worked up through mid-December.
So *something* has gone pretty seriously wacko, but it's hard to tell
what.  I guess I shall have to request buildroot access and start poking
at it with a debugger ...

			regards, tom lane


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