On Tue, 5 Apr 2005, Li Shaohua wrote:
> On Tue, 2005-04-05 at 03:10, Zwane Mwaikambo wrote:
> > On Mon, 4 Apr 2005, Li Shaohua wrote:
> >
> > > linux-2.6.11-root/arch/i386/kernel/smpboot.c | 6 ++++++
> > > linux-2.6.11-root/arch/i386/kernel/sysenter.c | 10 ++++++----
> > > linux-2.6.11-root/arch/i386/mach-voyager/voyager_smp.c | 6 ++++++
> > > 3 files changed, 18 insertions(+), 4 deletions(-)
> > >
> > > diff -puN arch/i386/kernel/sysenter.c~sep_init_cleanup
> > > arch/i386/kernel/sysenter.c
> > > --- linux-2.6.11/arch/i386/kernel/sysenter.c~sep_init_cleanup
> > > 2005-03-28 09:32:30.936304248 +0800
> > > +++ linux-2.6.11-root/arch/i386/kernel/sysenter.c 2005-03-28
> > > 09:58:20.703703792 +0800
> > > @@ -26,6 +26,11 @@ void enable_sep_cpu(void *info)
> > > int cpu = get_cpu();
> > > struct tss_struct *tss = &per_cpu(init_tss, cpu);
> > >
> > > + if (!boot_cpu_has(X86_FEATURE_SEP)) {
> > > + put_cpu();
> > > + return;
> > > + }
> > > +
> >
> > Do you have systems like this? Is it really skipping SEP if the boot
> > processor doesn't have SEP?
> No, I haven't such system. This is the logic of original SEP
> initialization. If the CPU hasn't SEP, original logic doesn't call
> 'on_each_cpu(enable_sep_cpu,...)'.
Got it, so i misread.
Thanks,
Zwane
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