lkml.org 
[lkml]   [2013]   [Nov]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: WARNING: CPU: 0 PID: 1 at init/main.c:711 do_one_initcall()
On 11/25/2013 04:15 PM, Richard Weinberger wrote:
> On Fri, Nov 22, 2013 at 7:02 AM, Yuanhan Liu
> <yuanhan.liu@linux.intel.com> wrote:
>> Greetings,
>>
>> I got the below dmesg and the first bad commit is
>>
>> commit 20545536cd8ea949c61527b6395ec8c0d2c237b1
>> Author: Boaz Harrosh <bharrosh@panasas.com>
>> Date: Thu Jul 19 15:22:37 2012 +0300
>>
>> RFC: do_xor_speed Broken on UML do to jiffies
>>
>> Remember that hang I reported a while back on UML. Well
>> I'm at it again, and it still hangs and I found why.
>>
>> I have dprinted jiffies and it never advances during the
>> loop at do_xor_speed. There for it is stuck in an endless
>> loop. I have also dprinted current_kernel_time() and it
>> returns the same constant value as well.
>>
>> Note that it does usually work on UML, only during
>> the modprobe of xor.ko while that test is running. It looks
>> like some lucking is preventing the clock from ticking.
>>
>> However ktime_get_ts does work for me so I changed the code
>> as below, so I can work. See how I put several safety
>> guards, to never get hangs again.
>> And I think my time based approach is more accurate then
>> previous system.
>>
>> UML guys please investigate the jiffies issue? what is
>> xor.ko not doing right?
>
> This patch never hit my mailbox...
>
>> Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
>>

Sir Richard

I never followed on this patch. Sorry. I do think it is in
the right direction, but it has a dev-by-zero problem and
a 32 bitness problem. (So I never sent it, beyond the initial
query)

[It stopped to be very important for me since I stopped using
UM very much. Ever since FC17 I'm unable to produce a running
image. It just will not boot, an image that a kvm would. So
very sad me, but no UML for me anymore.]

If you want to investigate. try doing a modprobe xor.ko on
a uml and see. since xor.ko is only built on demand for example
enabling exofs or object-layout-driver will select it. ,or MD-raid5.

Thanks
Boaz



\
 
 \ /
  Last update: 2013-11-25 16:41    [W:0.079 / U:0.072 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site