On Tue, Jul 25, 2006 at 12:29:34PM -0700, keith mannthey wrote:
On Tue, 2006-07-25 at 14:34 -0400, Dave Jones wrote:
> On Tue, Jul 25, 2006 at 11:24:42AM -0700, keith mannthey wrote:
>
> > Modern Summit hardware x460 is EMT64e (x440,x445 is not) but as you
> > know sometimes customers run 32bit OS's on 64bit boxes.
>
> I hear this from time to time, and every time I ask "why doesn't
> 32bit emulation in 64bit kernel work for you work?", the only
> answers that seen to come back are various flavours of
> "we didn't know about it" or "haven't tried it".
Is there a "Guarantee" that 32bit apps will just work with 64bit
kernels? I don't think all 32bit apps test (or work) on 64bit OS and a
such don't fall in the "Supported" configuration. Customers like to have
ground to stand on when things break. If they run unsupported in their
software stack things can get messy (who will fix it?) if problems arise
or performance is bad compared to 32bit native.
This is exactly the sort of hand-waving I was talking about.
If something doesn't work, lets find out why and _FIX_ it.
Scaremongering, and handwaving isn't going to solve a single bug.
32bit emulation sees a fair amount of testing. I daresay, a significant
amount more than i386 NUMA has ever seen, so "There might be bugs" is
just a ridiculous position.
Dave
--
http://www.codemonkey.org.uk