Re: 2.6.27-rc4-git1: Reported regressions from 2.6.26

[Rafael J. Wysocki]

On Monday, 25 of August 2008, Benjamin Herrenschmidt wrote:
> 
> > Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11414
> > Subject		: Random crashes with 2.6.27-rc3 on PPC
> > Submitter	: Michael Buesch <mb@xxxxxxxxx>
> > Date		: 2008-08-23 14:10 (1 days old)
> > References	: http://marc.info/?l=linux-kernel&m=121950076812616&w=4
> 
> This appears to be a gcc bug when -fno-omit-stack-pointer is used (which
> we mostly don't need on ppc anyway except that another gcc stupidity makes
> it mandatory for -pg which ftrace needs).
> 
> We're working on a two fold workaround: removing -fno-omit-stack-pointer
> in all the cases where we don't really need it, and for when we do (ie,
> CONFIG_FTRACE becaues of -pg), using -mno-sched-epilog which seems to
> work around it.
> 
> The root cause in gcc hasn't been fully identified yet.

Thanks Ben.

I've already dropped it from the list of recent regressions.

Rafael
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/