>-----Original Message----- >From: Chris Wright [mailto:[EMAIL PROTECTED] >Sent: Tuesday, May 08, 2007 2:52 AM >To: Thomas Gleixner >Cc: Chris Wright; LKML; Pallipadi, Venkatesh; john stultz; >Ingo Molnar; Arjan van de Ven; Steven Rostedt; Andi Kleen; >Andrew Morton >Subject: Re: [PATCH] x86-64 highres/dyntick support > >* Thomas Gleixner ([EMAIL PROTECTED]) wrote: >> On Tue, 2007-05-08 at 02:39 -0700, Chris Wright wrote: >> >> > OK, looks very similar all things considered. One thing I >didn't do >> > was fix lapic timer calibration (was hoping you'd do that >part, and you >> > did ;-) I've noticed that something has changed and I'm >seeing irq0 >> > handled on cpu3 (4 cpu system), where it used to be on >cpu0 as expected. >> >> Strange, irq balancing ? > >That's what I was wondering, although i have same setup for 32-bit >and it behaves as expected with cpu0 taking hpet or pit on irq0 >and lapic timer picked up on the other 3 cpus. >
Yes. Looks like irq balancing issue. On i386 I see irq has flag IRQF_NOBALANCING, but x86-64 does not have this flag. Can you add that and check whether that makes any difference. Thanks, Venki - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
