Messages in this thread | | | From | Andi Kleen <> | Subject | Re: Some interesting observations when trying to optimize vmstat handling | Date | Fri, 9 Nov 2007 16:56:26 +0100 |
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On Friday 09 November 2007 01:19, Jeremy Fitzhardinge wrote: > Andi Kleen wrote: > > The only problem is that there might be some code who relies on > > restore_flags() restoring other flags that IF, but at least for > > interrupts and local_irq_save/restore it should be fine to change. > > I don't think so. We don't bother to save/restore the other flags in > Xen paravirt and it doesn't seem to cause a problem. The semantics > really are specific to the state of the interrupt flag.
Yes i checked the code and only case I found is actually save_flags, not restore_flags
(and that particular case is even unnecessary)
-Andi
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