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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAG1a4rvYX9P+vHTLQBV_edViU8QriT=mrut0c5oS5YZ96L3x=A@mail.gmail.com>
Date:	Wed, 5 Oct 2011 17:43:22 -0400
From:	Pavel Ivanov <paivanof@...il.com>
To:	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Full lockup when compiling kernel with "optimal" number of threads

On Mon, Oct 3, 2011 at 5:39 AM, Srivatsa S. Bhat
<srivatsa.bhat@...ux.vnet.ibm.com> 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
threads.

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