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Bug#789180: linux: Register corruption bug on sparc, please enable SLUB as workaround



Control: tag -1 patch

On Sun, 2015-07-26 at 23:01 +0100, Ben Hutchings wrote:
> Control: forwarded -1 https://lists.debian.org/debian-sparc/2015/06/msg00005.html
> 
> On Thu, 2015-06-18 at 10:54 -0500, David Matthew Mattli wrote:
> > Source: linux
> > Severity: important
> > Tags: upstream
> > 
> > Dear Maintainer,
> > 
> > The kernel has a register corruption bug on sparc that is causing corruption
> > and failed builds. Enabling SLUB instead of SLAB in the kernel is an
> > effective workaround.
> [...]
> 
> For this test case, but probably not in general.  I think it's a bad
> idea to make this change and leave the root cause unfixed.  I suggest
> someone reminds David Miller that this is still open, as I don't see
> any update to that thread in the last month.

I think this is supposed to be fixed by:

commit 44922150d87cef616fd183220d43d8fde4d41390
Author: David S. Miller <davem@davemloft.net>
Date:   Thu Aug 6 19:13:25 2015 -0700

    sparc64: Fix userspace FPU register corruptions.

which is included in 4.1.6-rc1.  Can you verify that?

Ben.

-- 
Ben Hutchings
[W]e found...that it wasn't as easy to get programs right as we had thought.
... I realized that a large part of my life from then on was going to be spent
in finding mistakes in my own programs. - Maurice Wilkes, 1949

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