lkml.org 
[lkml]   [2014]   [Dec]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: frequent lockups in 3.18rc4
On 12/05/2014 01:38 AM, Linus Torvalds wrote:
> On Thu, Dec 4, 2014 at 9:00 PM, Sasha Levin <sasha.levin@oracle.com> wrote:
>> >
>> > Just to add to this: I've enabled the simplest level of verbosity in the fault
>> > injection options, and RCU stalls are again easy to trigger:
> Where do you log to?
>
> In particular, do you have some serial line logging enabled (perhaps
> even without anybody listening)? Or network logging?
>
> We've definitely had cases where logging itself is so slow that it
> triggers watchdogs etc. Logging to a serial line can take for*ever* in
> modern terms..

Yes, it's going to a serial line, but it's only about 100 lines/second on
average. I wouldn't expect it to cause anything to hang!


Thanks,
Sasha


\
 
 \ /
  Last update: 2014-12-05 16:21    [W:0.513 / U:1.460 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site