Messages in this thread | | | Date | Mon, 19 Mar 2007 20:18:14 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: [patch 13/26] Xen-paravirt_ops: Consistently wrap paravirt ops callsites to make them patchable |
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On Mon, 19 Mar 2007, Andi Kleen wrote: > > Initially we had some bugs that accounted for near all failures, but they > were all fixed in the latest version.
No. The real bugs were that the people involved wouldn't even accept that unwinding information was inevitably buggy and/or incomplete.
That much more fundamental bug never got fixed, as far as I know.
I'm not going to merge anything that depends on unwind tables as things stand. The pain just isn't worth it.
> > Please don't subject us to another couple months of hair-pulling only > > to have Linus yank the thing out again, there are certainly more > > useful things to spend time on :-)
Good call. Dwarf2 unwinding simply isn't worth doing. But I won't yank it out, I simply won't merge it. It was more than just totally buggy code, it was an inability of the people to understand that even bugfree code isn't enough - you have to be able to also handle buggy data.
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