From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-yk0-f182.google.com (mail-yk0-f182.google.com [209.85.160.182]) by kanga.kvack.org (Postfix) with ESMTP id D55FE6B0038 for ; Fri, 20 Mar 2015 15:54:16 -0400 (EDT) Received: by ykfc206 with SMTP id c206so47555143ykf.1 for ; Fri, 20 Mar 2015 12:54:16 -0700 (PDT) Received: from aserp1040.oracle.com (aserp1040.oracle.com. [141.146.126.69]) by mx.google.com with ESMTPS id v43si2584137yhv.45.2015.03.20.12.54.15 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Fri, 20 Mar 2015 12:54:16 -0700 (PDT) Message-ID: <550C7AE1.1000808@oracle.com> Date: Fri, 20 Mar 2015 13:54:09 -0600 From: David Ahern MIME-Version: 1.0 Subject: Re: 4.0.0-rc4: panic in free_block References: <550C5078.8040402@oracle.com> <550C6151.8070803@oracle.com> <20150320.154700.1250039074828760104.davem@davemloft.net> In-Reply-To: <20150320.154700.1250039074828760104.davem@davemloft.net> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: David Miller Cc: torvalds@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, sparclinux@vger.kernel.org On 3/20/15 1:47 PM, David Miller wrote: > From: David Ahern > 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, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org