Re: 2.6.16-rc1-mm4 i386 atomic operations broken on SMP (in modulesat least)

[Neil Brown]

On Thursday February 2, jamagallon@xxxxxxx wrote:
> On Thu, 2 Feb 2006 12:50:19 +1100, Neil Brown <neilb@xxxxxxx> wrote:
> 
> > On Thursday February 2, jamagallon@xxxxxxx wrote:
> > > On Thu, 2 Feb 2006 12:19:22 +1100, Neil Brown <neilb@xxxxxxx> wrote:
> > > 
> > > > 
> > > > I've been testing md/raid in 2.6.16-rc1-mm4 on a dual Xeon with most
> > > > of the md personalities compiled as modules, and weird stuff if
> > > > happening.
> > > > 
> > > > In particular I'm getting lots of 
> > > > 
> > > >     BUG: atomic counter underflow at:
> > > > 
> > > > reports in raid10 and raid5, which are modules.
> > > > 
> > > >
> > > 
> > > I also run this kernel (plus a couple patches) on a SATA raid5 setup, and
> > > had no problems. People throws and gets files via SMB/AFP, mainly.
> > > 
> > > My box is dual PIII@933.
> > 
> > Is 'raid5' a module, or is it compiled in?
> > 
> 
> nada:/usr/src/linux# grep _MD_ .config
> CONFIG_MD_LINEAR=y
> CONFIG_MD_RAID0=y
> CONFIG_MD_RAID1=y
> CONFIG_MD_RAID10=y
> CONFIG_MD_RAID5=y

I see it's not a module.
That points pretty strongly to the module loading code then I guess.

Thanks,
NeilBrown
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