Re: [PATCH][RFC] 4K stacks default, not a debug thing any more...?

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On 07/17/2007 06:14 PM, Shawn Bohrer wrote:


I can't speak for Fedora, but RHEL disables XFS in their kernel likely
because it is known to cause problems with 4K stacks.
Okay. So is it fair to say it's largely XFS that's the problem? No problems with LVM/MD and say plain ext? If that's the case, I believe it could be concluded that it's not something in any sense fundamentally unfixable and the question becomes why XFS isn't fixed...
Well, no. "oldconfig" works fine, and other than that, all failure modes I've heard about also in this thread are MD/LVM/XFS. This is extremely widely tested stuff in at least Fedora and RHEL. 

Again don't assume that because Fedora and RHEL have 4K stacks means
that MD/LVM/XFS is widely tested.
No, quite, that specific combination was reported in this thread alone 3 times again, so that one's clear, but _other_ than that, I've heard of no other failure modes. 


Additionally I think I should point out that the problems pointed out so
far are not the only problem areas with 4K stacks.  There are out of
tree drivers to consider as well, and use cases like ndiswrapper.
Except these. Good to have pointed out, thanks, but as far as I'm concerned both these cases do not get a say in what's default configuration for the kernel.org kernel. They might get a say in what's removed or not removed from that kernel but that's not under discussion at the moment (nor would I expect it to be anytime soon if ever). 

Rene.

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