Re: Full lockup when compiling kernel with "optimal" number of threads

From: Pavel Ivanov
Date: Wed Oct 05 2011 - 17:43:54 EST

On Mon, Oct 3, 2011 at 5:39 AM, Srivatsa S. Bhat
<srivatsa.bhat@xxxxxxxxxxxxxxxxxx> wrote:
> On 09/03/2011 09:04 AM, Pavel Ivanov wrote:
>> Hi,
>> I can reliably reproduce a complete machine lockup when compiling
>> kernel sources with "make -j". After making some progress machine
>> stops responding to anything (including CapsLock/NumLock switching or
>> mouse moving) and after hard reboot nothing is left in kern.log or
>> syslog. Only attaching a serial console gives me the following clues
>> to what happens:
> By the way "optimal" is supposed to be make -j <nr_cpus*2> isn't it?
> IIRC, "maximal" refers to make -j

I'm sure I didn't make up that word "optimal" by myself. I took it
from some documentation or internet, although now I can't find where I
took it from. Wherever I look it says that -j is "unbounded" number of

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