Re: Random GCC segfaults -- Was: [2.6.16] slab error in slab_destroy_objs(): cache `radix_tree_node'...

[Pavel Machek <pavel@ucw.cz>]

Hi!

> On Tue, 28 Mar 2006 00:41:37 -0800
> Andrew Morton <akpm@osdl.org> wrote:
> 
> > If those errors had no corresponding kernel messages then what you have is
> > a classic symptom of failing memory hardware.  Suggest you grab memtest86,
> > run it for 24 hours.
> 
> I've already run memtest86+ for hours (not 24 ok... "only" 4/5h) and I
> found this:
> 
> An easly reproducilble memory failure (single bit flipping always at
> the same address) <---- this one goes AWAY disabling bank interleaving
> in BIOS.
> 
> Another memory failure (different address, always one bit flipping)
> isn't found by memtest86+: I found it with CONFIG_DEBUG_SLAB and
> I "fixed" it with memmap=... boot option.
> 
> 
> Now, these 2 problems are both in my first 256MB memory module, so maybe
> it is really another memory failure.
> 
> BUT now that I'm back on 2.6.15.6 I'm compiling a LOT of big CPP
> projects and I haven't seen a single GCC segfault yet.
> 
> Maybe I should retry with 2.6.16 and if I can reproduce the problem I
> can start testing 2.6.16-rc1 and so on...

I'd really get new RAM... If the machine is "known bad", debugging on
it is likely waste of time.
								Pavel
-- 
Picture of sleeping (Linux) penguin wanted...