linux-kernel - Re: 'autogroup' sched code KILLING responsiveness

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]

Date:	Fri, 21 Jan 2011 16:39:03 -0600
From:	Michael Witten <mfwitten@...il.com>
To:	Mike Galbraith <efault@....de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: 'autogroup' sched code KILLING responsiveness

On Fri, Jan 21, 2011 at 16:27, Mike Galbraith <efault@....de> wrote:
> On Fri, 2011-01-21 at 10:20 -0800, Michael Witten wrote:
>> Bisecting shows that this commit:
>>
>>   5091faa449ee0b7d73bc296a93bca9540fc51d0a
>>   sched: Add 'autogroup' scheduling feature: automated per session task groups
>>   Date:   Tue Nov 30 14:18:03 2010 +0100
>>
>> is the reason that my computer has become unusable.
>>
>> With that code in place, a resource-intensive activity (such as
>> compiling the Linux kernel) causes my computer to become
>> unresponsive for many seconds at a time; the entire screen
>> does not refresh, typed keys are dropped or are handled very
>> late, etc (even in Linux's plain virtual consoles).
>
> That's not what I'm experiencing with a UP kernel...

Before I try to gather any data, I'd like to point out that the
problem disappears when I disable CONFIG_SCHED_AUTOGROUP (General
setup -> Automatic process group scheduling).

Do you have it disabled?
--
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/