RE: [KERNEL BUG] do_timer/tick_handover_do_timer 3.10.17

2015-05-07 Thread Oza (Pawandeep) Oza
akikb...@gmail.com] Sent: Friday, May 08, 2015 10:42 AM To: Oza (Pawandeep) Oza Cc: pawandeep oza; linux-kernel@vger.kernel.org; malayasen rout Subject: Re: [KERNEL BUG] do_timer/tick_handover_do_timer 3.10.17 On Fri, 2015-05-08 at 04:16 +, Oza (Pawandeep) Oza wrote: > So Mike, is this reaso

Re: [KERNEL BUG] do_timer/tick_handover_do_timer 3.10.17

2015-05-07 Thread Mike Galbraith
On Fri, 2015-05-08 at 04:16 +, Oza (Pawandeep) Oza wrote: > So Mike, is this reason strong enough for you ? Nope. I think you did the right thing in removing your dependency on jiffies reliability in a dying box. You don't have to convince me of anything though, CC timer subsystem maintainer

RE: [KERNEL BUG] do_timer/tick_handover_do_timer 3.10.17

2015-05-07 Thread Oza (Pawandeep) Oza
s in this path" Regards, -Oza -Original Message- From: Oza (Pawandeep) Oza Sent: Thursday, May 07, 2015 2:17 PM To: 'Mike Galbraith' Cc: pawandeep oza; linux-kernel@vger.kernel.org; malayasen rout Subject: RE: [KERNEL BUG] do_timer/tick_handover_do_timer 3.10.17 Oh ok. So the re

RE: [KERNEL BUG] do_timer/tick_handover_do_timer 3.10.17

2015-05-07 Thread Oza (Pawandeep) Oza
-Original Message- From: Mike Galbraith [mailto:umgwanakikb...@gmail.com] Sent: Thursday, May 07, 2015 2:00 PM To: Oza (Pawandeep) Oza Cc: pawandeep oza; linux-kernel@vger.kernel.org; malayasen rout Subject: Re: [KERNEL BUG] do_timer/tick_handover_do_timer 3.10.17 On Thu, 2015-05-07 at 07:05 +

Re: [KERNEL BUG] do_timer/tick_handover_do_timer 3.10.17

2015-05-07 Thread Mike Galbraith
On Thu, 2015-05-07 at 07:05 +, Oza (Pawandeep) Oza wrote: > : ) > > Well, I am not sure, if problem was communicated clearly from my side. I understood. I just don't understand why you'd care deeply whether CPU0 halts or eternally waits. Both render it harmless and useless. -Mike

RE: [KERNEL BUG] do_timer/tick_handover_do_timer 3.10.17

2015-05-07 Thread Oza (Pawandeep) Oza
u == cpu) Regards, -Oza -Original Message- From: Oza (Pawandeep) Oza Sent: Thursday, May 07, 2015 12:36 PM To: 'Mike Galbraith' Cc: pawandeep oza; linux-kernel@vger.kernel.org; malayasen rout Subject: RE: [KERNEL BUG] do_timer/tick_handover_do_timer 3.10.17 : ) Well, I am not

RE: [KERNEL BUG] do_timer/tick_handover_do_timer 3.10.17

2015-05-07 Thread Oza (Pawandeep) Oza
-Original Message- From: Mike Galbraith [mailto:umgwanakikb...@gmail.com] Sent: Thursday, May 07, 2015 12:25 PM To: Oza (Pawandeep) Oza Cc: pawandeep oza; linux-kernel@vger.kernel.org; malayasen rout Subject: Re: [KERNEL BUG] do_timer/tick_handover_do_timer 3.10.17 On Thu, 2015-05-07 at 05:58 +

Re: [KERNEL BUG] do_timer/tick_handover_do_timer 3.10.17

2015-05-06 Thread Mike Galbraith
On Thu, 2015-05-07 at 05:58 +, Oza (Pawandeep) Oza wrote: > Yes. > But dying kernel doesn’t mean it CAN NOT INCREMENT jiffies. > do_timer should do the job until kernel takes its last breathe and more > precisely CPU0 take its last breathe by halting itself as its last > instruction. Feel fr

RE: [KERNEL BUG] do_timer/tick_handover_do_timer 3.10.17

2015-05-06 Thread Oza (Pawandeep) Oza
[mailto:umgwanakikb...@gmail.com] Sent: Thursday, May 07, 2015 11:25 AM To: Oza (Pawandeep) Oza Cc: pawandeep oza; linux-kernel@vger.kernel.org; malayasen rout Subject: Re: [KERNEL BUG] do_timer/tick_handover_do_timer 3.10.17 On Thu, 2015-05-07 at 05:12 +, Oza (Pawandeep) Oza wrote: > But after Cr

Re: [KERNEL BUG] do_timer/tick_handover_do_timer 3.10.17

2015-05-06 Thread Mike Galbraith
On Thu, 2015-05-07 at 05:12 +, Oza (Pawandeep) Oza wrote: > But after Crash, jiffies do not increment. Your kernel said "I'M DEAD", that's a good reason to believe it. -Mike -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord

RE: [KERNEL BUG] do_timer/tick_handover_do_timer 3.10.17

2015-05-06 Thread Oza (Pawandeep) Oza
Crash. But after Crash, jiffies do not increment. Regards, -Oza -Original Message- From: Mike Galbraith [mailto:umgwanakikb...@gmail.com] Sent: Thursday, May 07, 2015 10:39 AM To: Oza (Pawandeep) Oza Cc: pawandeep oza; linux-kernel@vger.kernel.org; malayasen rout Subject: Re: [KERNEL BUG

Re: [KERNEL BUG] do_timer/tick_handover_do_timer 3.10.17

2015-05-06 Thread Mike Galbraith
On Thu, 2015-05-07 at 04:37 +, Oza (Pawandeep) Oza wrote: > Problem Statement: the timkeeping is stopped, do_timer is no more a > job of cpu0. > > The reason: the variable "tick_do_timer_cpu" is not set to correct CPU > (cpu0) > And when BUG() happens, the tick_do_timer_cpu variable stay set t

RE: [KERNEL BUG] do_timer/tick_handover_do_timer 3.10.17

2015-05-06 Thread Oza (Pawandeep) Oza
- From: Mike Galbraith [mailto:umgwanakikb...@gmail.com] Sent: Thursday, May 07, 2015 8:53 AM To: pawandeep oza Cc: linux-kernel@vger.kernel.org; malayasen rout; Oza (Pawandeep) Oza Subject: Re: [KERNEL BUG] do_timer/tick_handover_do_timer 3.10.17 On Wed, 2015-05-06 at 22:57 +0530, pawandeep

Re: [KERNEL BUG] do_timer/tick_handover_do_timer 3.10.17

2015-05-06 Thread Mike Galbraith
On Wed, 2015-05-06 at 22:57 +0530, pawandeep oza wrote: > but when say core0 has raised BUG.. ... > what is the right way to approach this problem Look at the spot BUG() printed? BUG() means "Way to go slick, the code you fed me (file:line) is toxic. Have a nice day, your ex-buddy core0".