Messages in this thread | | | Date | Wed, 12 Feb 2003 18:23:05 +0000 | From | Jamie Lokier <> | Subject | Re: Re: [Bug 350] New: i386 context switch very slow compared to 2.4 due to wrmsr (performance) |
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mika.penttila@kolumbus.fi wrote: > BTW, why is sysenter supposed to be disabled while in vm86? And if > it should be disabled (as now in sys_vm86), the next context switch > back to the vm86 process re-enables it, in load_esp0, right? So what's > the gain?
I quite misread the code in entry.S at ret_from_int. The comment "returning to kernel or vm86-space" confused me - of course scheduling happens in vm86 mode.
(Andi et al., forget anything I've said about CONFIG_PREEMPT problems! :).
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