Re: sun x4500 soft lockup during raid creation

["Keld Jørn Simonsen" <keld@dkuug.dk>]

On Fri, Jan 30, 2009 at 09:38:06PM +0200, Vladimir Ivashchenko wrote:
> On Fri, 2009-01-30 at 10:28 -0500, Bill Davidsen wrote:
> 
> > > I changed the kernel to 2.6.27.12-78.2.8.fc9.i686 and so far it is stable. 
> > >
> > > x64 will be the next step. i686 is what our guys install by default, I didn't bother to reinstall it.
> > >
> >    
> > In spite of the theoretical benefits of 64 bit, I find that the 
> > advantages are "measurable but not noticeable" for most things. The lack 
> > of 64 bit versions of some applications was a problem for me, but may 
> > not be for you. I did find that even building from source not all 
> > applications worked right, or worked at all, or in some cases compiled. :-(
> 
> More or less this is our experience also, but this box will only be used
> as a file-server.
> 
> Does anybody know if software RAID benefits when being run in 64-bit ?

I think it may. IO buffer copying may be twice as  fast.
Some statistics on IO, including network traffic can be measured
when it goes beyound about 100 Mbit/s - tehere are some counters that
would overflow 32 bit.


best regards
keld