[prev in list] [next in list] [prev in thread] [next in thread] 

List:       linux-kernel
Subject:    Re: [PATCH 0/9] V2: idle page tracking / working set estimation
From:       Eric B Munson <emunson () mgebm ! net>
Date:       2011-09-30 21:40:33
Message-ID: 7bf74fcb33ce31bcc933db6d90b03733 () mgebm ! net
[Download RAW message or body]

 On Fri, 30 Sep 2011 14:16:25 -0700, Michel Lespinasse wrote:
> On Fri, Sep 30, 2011 at 11:19 AM, Eric B Munson <emunson@mgebm.net> 
> wrote:
>> I am able to recreate on a second desktop I have here (same model 
>> CPU but a
>> different MB so I am fairly sure it isn't dying hardware).  It looks 
>> to me like
>> a CPU softlocks and it stalls the process active there, so most 
>> recently that
>> was XOrg.  The machine lets me login via ssh for a few minutes, but 
>> things like
>> ps and cat or /proc files will start to work and give some output 
>> but hang.
>> I cannot call reboot, nor can I sync the fs and reboot via SysRq. 
>>  My next step
>> is to setup a netconsole to see if anything comes out in the syslog 
>> that I
>> cannot see.
>
> I haven't had time to try & reproduce locally yet (apologies - things
> have been coming up at me).
>
> But a prime suspect would be a bad interaction with
> CONFIG_MEMORY_HOTPLUG, as Kamezama remarked in his reply to patch 4. 
> I
> think this could be the most likely cause of what you're observing.

 I will try disabling Memory Hotplug on Monday and let you know if that 
 helps.

 Eric
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/
[prev in list] [next in list] [prev in thread] [next in thread]