Messages in this thread | ![/](/images/icornerl.gif) | | Date | Sun, 20 Apr 2003 13:03:03 -0400 | From | Chuck Ebbert <> | Subject | [PATCH][2.5.68] 16-byte align x86 IRQ entry points |
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How can I further test this patch? (It boots...)
It should be harmless; at worst it will add about 1K to an SMP or IOAPIC kernel.
If it works it should reduce interrupt latency.
--- a/arch/i386/kernel/entry.S +++ b/arch/i386/kernel/entry.S @ -382,29 +382,31 @ ENTRY(interrupt) .text -vector=0 + .align 16,0x90 ENTRY(irq_entries_start) +vector=0 .rept NR_IRQS - ALIGN 1: pushl $vector-256 jmp common_interrupt + .align 16,0x90 .data .long 1b .text vector=vector+1 .endr - ALIGN +/* aligned 16 */ common_interrupt: SAVE_ALL call do_IRQ jmp ret_from_intr #define BUILD_INTERRUPT(name, nr) \ + .align 16,0x90; \ ENTRY(name) \ pushl $nr-256; \ SAVE_ALL \ - call smp_/**/name; \ + call smp_/**/name; \ jmp ret_from_intr; /* The include is where all of the SMP etc. interrupts come from */
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