On Saturday 25 June 2005 02:20, Linus Torvalds wrote: > On Wed, 22 Jun 2005, Alexander Y. Fomichev wrote: > > I've been trying to switch from 2.6.12-rc3 to 2.6.12 on Dual EM64T 2.8 > > GHz [ MoBo: Intel E7520, intel 82801 ] > > but kernel hangs on boot right after records: > > > > Booting processor 2/1 rip 6000 rsp ffff8100023dbf58 > > Initializing CPU#2 > > Hmm.. Since you seem to be a git user, maybe you could try the git > "bisect" thing to help narrow down exactly where this happened (and help > test that thing too ;).
[skiped] Ok, as i can see [and as Andi guessed http://bugme.osdl.org/show_bug.cgi?id=4792] issue have been introduced by new TSC sync algorithm git id: dda50e716dc9451f40eebfb2902c260e4f62cf34. And, yes, seems like it depends of timings... In my case kludge with insertion of low delay (e.g. printk) between cpu_set/mb and tsc_sync_wait() makes kernel bootable. diff -urN b/arch/x86_64/kernel/smpboot.c a/arch/x86_64/kernel/smpboot.c --- b/arch/x86_64/kernel/smpboot.c 2005-07-17 21:55:55.000000000 +0400 +++ a/arch/x86_64/kernel/smpboot.c 2005-07-17 21:57:56.000000000 +0400 @@ -451,6 +451,7 @@ cpu_set(smp_processor_id(), cpu_online_map); mb(); + printk(KERN_INFO "We're still here!\n"); /* Wait for TSC sync to not schedule things before. We still process interrupts, which could see an inconsistent time in that window unfortunately. */ -- Best regards. Alexander Y. Fomichev <[EMAIL PROTECTED]> Public PGP key: http://sysadminday.org.ru/gluk.asc - To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
