Messages in this thread | | | From | "Manfred Spraul" <> | Subject | Re: [PATCH] 2.4.16 kernel/printk.c (per processorinitializationcheck) | Date | Sat, 8 Dec 2001 18:36:51 +0100 |
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Alan Cox wrote: > x86_udelay_tsc wont have been set at that point so the main timer is still > being used.
No. x86_udelay_tsc is initialized by time_init(), and time_init() is called before smp_init(). The udelay implementation only multiplies with loops_per_jiffy, therefore there is no oops on i386.
But could oops if the bios disables the TSC instruction - the first printk on the secondary cpu happens before
clear_in_cr4(X86_CR4_VME|X86_CR4_PVI|X86_CR4_TSD|X86_CR4_DE)
-- Manfred
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