linux-kernel - Re: 4.0.0-rc4: panic in free

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: <550C7AE1.1000808@oracle.com>
Date:	Fri, 20 Mar 2015 13:54:09 -0600
From:	David Ahern <david.ahern@...cle.com>
To:	David Miller <davem@...emloft.net>
CC:	torvalds@...ux-foundation.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, sparclinux@...r.kernel.org
Subject: Re: 4.0.0-rc4: panic in free_block

On 3/20/15 1:47 PM, David Miller wrote:
> From: David Ahern <david.ahern@...cle.com>
> Date: Fri, 20 Mar 2015 12:05:05 -0600
>
>> DaveM: do you mind if I submit a patch to change the default for sparc
>> to SLUB?
>
> I think we're jumping the gun about all of this, and doing anything
> with default Kconfig settings would be entirely premature until we
> know what the real bug is.

The suggestion to change to SLUB as the default was based on Linus' 
comment "SLAB is probably also almost unheard of in high-CPU
configurations, since slub has all the magical unlocked lists etc for
scalability."

>
> On my T4-2 I've used nothing but SLAB and haven't hit any of these
> problems.  I can't even remember the last time I turned SLUB on,
> and it's just because I'm lazy.
>

Interesting. With -j <64 and talking softly it completes. But -j 128 and 
higher always ends in a panic.


--
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/