Re: [PATCH v2 5/5] powerpc: Remove -mno-sched-epilog

On Fri, Sep 14, 2018 at 03:20:18PM -0700, Nick Desaulniers wrote:

On Fri, Sep 14, 2018 at 2:56 PM Segher Boessenkool
[off-list ref] wrote:

quoted

On Sat, Sep 15, 2018 at 06:43:05AM +1000, Nicholas Piggin wrote:

quoted

On Fri, 14 Sep 2018 11:03:38 -0700
Nick Desaulniers [off-list ref] wrote:

Sorry I forgot to cc you. This has links to some of the sched
epilog bugs.

https://marc.info/?l=linuxppc-embedded&m=153690223909654&w=2

Cool, cc me on the thread if you'd like me to add my reviewed-by tag
visibly on the thread.

quoted

PR44199 was backported to 4.4 and PR52828 is fixed in 4.8.

Are those GCC versions? If so, what does that mean for the users of
the many GCC releases between 4.4 and 4.8?

Yes, GCC bug 44199 was fixed in GCC version 4.4, etc.  It of course also
is fixed in all later versions; so GCC releases between 4.4 and 4.8 have
the fix for PR44199 but not that for PR52828.

I didn't check exactly what 4.4.x versions have the fix, etc.  I always
assume anyone using x.y.z uses the highest z available.

I don't know if those are the only fixes you need; those are the two
bugs mentioned in Nicholas' patch (that MARC link above).


Segher