From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Wilcox Subject: Re: Next May 11 : BUG during scsi initialization Date: Mon, 11 May 2009 06:21:35 -0600 Message-ID: <20090511122135.GC8112@parisc-linux.org> References: <20090511161442.3e9d9cb9.sfr@canb.auug.org.au> <4A081002.4050802@in.ibm.com> <20090511115233.GB8112@parisc-linux.org> <4A081437.7000409@in.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from palinux.external.hp.com ([192.25.206.14]:44253 "EHLO mail.parisc-linux.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752044AbZEKMVf (ORCPT ); Mon, 11 May 2009 08:21:35 -0400 Content-Disposition: inline In-Reply-To: <4A081437.7000409@in.ibm.com> Sender: linux-next-owner@vger.kernel.org List-ID: To: Sachin Sant Cc: Stephen Rothwell , linux-next@vger.kernel.org, linux-scsi , linuxppc-dev@ozlabs.org, Pekka Enberg , Nick Piggin On Mon, May 11, 2009 at 05:34:07PM +0530, Sachin Sant wrote: > Matthew Wilcox wrote: >> On Mon, May 11, 2009 at 05:16:10PM +0530, Sachin Sant wrote: >> >>> Today's Next tree failed to boot on a Power6 box with following BUG : >> >> This doesn't actually appear to be a SCSI bug ... it looks like SCSI tried >> to allocate memory and things went wrong in the memory allocator: >> >> [c0000000c7d038b0] [c0000000005d67d8] ._spin_lock+0x10/0x24 >> [c0000000c7d03920] [c00000000013fbdc] .__slab_alloc_page+0x344/0x3cc >> [c0000000c7d039e0] [c000000000141168] .kmem_cache_alloc+0x13c/0x21c >> [c0000000c7d03aa0] [c000000000141b04] .kmem_cache_create+0x294/0x2a8 >> [c0000000c7d03b90] [d000000000ea14cc] .scsi_init_queue+0x38/0x170 [scsi_mod] >> >> Which memory allocator did you have selected (SLAB, SLUB, SLOB, SLQB)? >> > Default one. SLQB > > CONFIG_SLQB_ALLOCATOR=y > CONFIG_SLQB=y > > Page size is 64K with Config DEBUG_PAGEALLOC set. > > CONFIG_PPC_HAS_HASH_64K=y > CONFIG_PPC_64K_PAGES=y > CONFIG_DEBUG_PAGEALLOC=y Hm. We've seen some similar problems at Intel while doing database performance tests with SLQB. Any ideas, Nick? -- Matthew Wilcox Intel Open Source Technology Centre "Bill, look, we understand that you're interested in selling us this operating system, but compare it to ours. We can't possibly take such a retrograde step."