Messages in this thread | | | Date | Sat, 4 Jan 2003 19:52:55 -0800 (PST) | From | Linus Torvalds <> | Subject | Re: [BENCHMARK] Lmbench 2.5.54-mm2 (impressive improvements) |
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On Sat, 4 Jan 2003, Andrew Morton wrote: > > > > Hmm.. The backup patch doesn't handle single-stepping correctly: the > > eflags cleanup singlestep patch later in the sysenter sequence _depends_ > > on the stack (and thus thread) being right on the very first in-kernel > > instruction. > > Well that's just a straight `patch -R' of the patch which added the wrmsr's.
Yes, but the breakage comes laterr when a subsequent patch in the 2.5.53->54 stuff started depending on the stack location being stable even on the first instruction.
> > It doesn't show up on lmbench (insufficient precision), but your AIM9 > > numbers are quite interesting. Are they stable? > > Seem to be, but more work is needed, including oprofiling. Andi is doing > some P4 testing at present.
Ok.
Linus
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