Linus Torvalds wrote: > > On Tue, 26 Aug 2008, Mike Travis wrote: >> The need to allow distros to set NR_CPUS=4096 (and NODES_SHIFT=9) is >> critical to our upcoming SGI systems using what we have been calling >> "UV". > > That's fine. You can do it. The default kernel will not, because it's > clearly not safe. > > I really don't care what you do to _your_ images. But I will not > distribute a known-broken kernel, and I will not debug random stack > overflows that happen in it. > > If you want the default kernel to support 4k cores, we'll need to fix the > stack usage. I don't think that is impossible, but IT IS NOT GOING TO > HAPPEN for 2.6.27. > > And quite frankly, if some vendor like RedHat enables NR_CPUS=4096 by > default, they are totally and utterly crazy. > > But some SGI-specific binary that is meant for SGI machines only, and has > been extensively tested with the setup used on SGI machines is a different > thing. > > Linus Ok, thanks for the reply, and looking into this issue. We will "strongly encourage" our distros to base the relevant releases on 2.6.28. :-) [Supplying an SGI-specific kernel would not be acceptable to many of our customers because of the certification issues I mentioned.] Mike -- To unsubscribe from this list: send the line "unsubscribe kernel-testers" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
