Re: Have the 2.4 kernel memory management problems on large machines been fixed?

Martin J. Bligh
2002-05-22T22:45:14Z

>> If we could get the apps (well, Oracle) to co-operate, we could just use
>> clone ;-) Having this transparent for shmem segments would be really nice.
>
> The thing is, we won't get Oracle to rewrite a lot for a completely
> threaded system. And clone does _not_ come with a way to share only parts
> of the VM, and never will - that's fundamentally against the way "struct
> mm_struct" works.

We're actually playing with Oracle apps - I'm told they already run on threaded
mode on NT ... I personally get the feeling that Oracle's commitment to Linux is
distinctly half-hearted. The whole support matrix debacle was pretty indicative,
IMHO. All personal opinion, I speaketh not for IBM.

> Oracle is apparently already used to magic shmem-like things, so doing
> that is probably acceptable to them.

We can but try, but I still think some transparent magic would be implementable.

M.