linux-kernel - Re: frequent lockups in 3.18rc4

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:	Thu, 20 Nov 2014 12:51:17 -0800
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Don Zickus <dzickus@...hat.com>
Cc:	Dave Jones <davej@...hat.com>,
	Andy Lutomirski <luto@...capital.net>,
	Thomas Gleixner <tglx@...utronix.de>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	"the arch/x86 maintainers" <x86@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: frequent lockups in 3.18rc4

On Thu, Nov 20, 2014 at 12:37 PM, Don Zickus <dzickus@...hat.com> wrote:
>
> Just for clarification, softlockups are processes hogging the cpu (thus
> blocking the high priority per-cpu watchdog thread).

Right. And there is no actual sign of any CPU hogging going on.
There's a single system call with a small payload (I think it's safe
to call 64kB small these days), no hugely contended CPU-spinning
locking, nada.

                    Linus
--
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/