lkml.org 
[lkml]   [2008]   [Jul]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC 00/15] x86_64: Optimize percpu accesses

* Mike Travis <travis@sgi.com> wrote:

> After that is taken care of, I'll start regression testing earlier
> compilers. I think someone mentioned that gcc-2.something was the
> minimum required...?

i think the current official minimum is around gcc-3.2 [2.x is out of
question because we have a few feature dependencies on gcc-3.x] - but i
stopped using it because it miscompiles the kernel so often. 4.0 was
really bad due to large stack footprint. The 4.3.x series miscompiles
the kernel too in certain situations - there was a high-rising
kerneloops.org crash recently in ext3.

So in general, 'too new' is bad because it has new regressions, 'too
old' is bad because it has unfixed old regressions. Somewhere in the
middle, 4.2.x-ish, seems to be pretty robust in practice.

Ingo


\
 
 \ /
  Last update: 2008-07-09 23:15    [W:0.172 / U:0.032 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site