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Re: Bug#691576: GDB still broken with 3.11.10-1



On Thu, Dec 12, 2013 at 10:20:30PM +0100, Émeric MASCHINO wrote:
> Ben,
> 
> I was not reporting this as a reproach,

I understood that.

> but simply to track down which kernels work and which don't.
> From my records:
> - 2.6.38: KO (*) see below
> - 3.0.0-2: OK
> - 3.1.0-1: KO
> - 3.2.23: KO
> - 3.2.35-2: OK
> - 3.2.46-1+deb7u1: KO

Failing to see a pattern here. :-/

[...]
> I don't know if upstream people are subscribed to this list. When I
> asked on linux-ia64 which distro ia64 people are running [1], the only
> answer I got was from Raúl Porcel, the Gentoo-ia64 maintainer, nothing
> from Intel or hp developers. So I don't know how Linux/ia64
> development is managed. Are Intel and hp people using a custom distro?
> Are they simply running Itanium systems?
[...]

So far as I know, there is no longer any commercial development of
Linux on Itanium.  Some old 'enterprise' distributions might
continue to be supported for a few years but mainline isn't
supported.

I heard from Will Deacon that gcc's code generation for ia64 has
regressed in 4.6 or earlier and this may be responsible for some
reported kernel bugs.  He also though that reducing the
optimisation level could help.

I actually tried building the kernel like that, so you could try the
packages in:

http://people.debian.org/~benh/packages/wheezy-ia64-kernel-O1/

Ben.

-- 
Ben Hutchings
We get into the habit of living before acquiring the habit of thinking.
                                                              - Albert Camus


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