Messages in this thread | | | Date | Tue, 5 Apr 2005 02:00:16 -0600 (MDT) | From | Zwane Mwaikambo <> | Subject | Re: [RFC 1/6]SEP initialization rework |
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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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