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Date: Sun, 13 May 2007 16:47:51 -0700 (PDT)
From: Christoph Lameter <clameter@sgi.com>
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To: Jens Axboe <jens.axboe@oracle.com>
cc: Oliver Xymoron <oxymoron@waste.org>, akpm@linux-foundation.org,
       linux-kernel@vger.kernel.org
Subject: Re: SLUB under lguest on i386
In-Reply-To: <20070512182756.GP4629@kernel.dk>
Message-ID: <Pine.LNX.4.64.0705131645360.6481@schroedinger.engr.sgi.com>
References: <20070511213336.GX11166@waste.org> <20070512182756.GP4629@kernel.dk>
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On Sat, 12 May 2007, Jens Axboe wrote:

> On Fri, May 11 2007, Oliver Xymoron wrote:
> > Tried to boot using SLUB under lguest with 2.6.21-mm2. Got the
> > following:
> > 
> > ...
> > [    0.388000] NET: Registered protocol family 17
> > [    0.388000] Using IPI Shortcut mode
> > [    0.420000] EXT2-fs warning: mounting unchecked fs, running e2fsck
> > is recommended
> > [    0.420000] VFS: Mounted root (ext2 filesystem).
> > [    0.420000] Freeing unused kernel memory: 188k freed
> > [   17.536000] BUG: spinlock lockup on CPU#0, init/1, c17de0c0
> > [   17.536000]  [<c0104584>] show_trace_log_lvl+0x1a/0x30
> > [   17.536000]  [<c0105196>] show_trace+0x12/0x14
> > [   17.536000]  [<c0105222>] dump_stack+0x15/0x17
> > [   17.536000]  [<c021339f>] _raw_spin_lock+0xbf/0xd8
> > [   17.536000]  [<c03cd41a>] _spin_lock+0x3c/0x42
> > [   17.536000]  [<c0154f0c>] vma_adjust+0x1a9/0x35f
> > [   17.536000]  [<c01554c3>] vma_merge+0x158/0x168
> > [   17.536000]  [<c0155b3b>] mmap_region+0x13b/0x405
> > [   17.536000]  [<c01560ec>] do_mmap_pgoff+0x211/0x269
> > [   17.536000]  [<c0107594>] sys_mmap2+0x64/0xb4
> > [   17.536000]  [<c010763d>] old_mmap+0x59/0x5f
> > [   17.536000]  [<c0103ed0>] syscall_call+0x7/0xb
> > [   17.536000]  =======================
> > 
> > And no sign of further progress. SLAB worked fine.
> 
> Exact same thing happens on real hardware here.

Anyone could try this with slub_debug on the kernel command line? Another 
assumption that page size allocs are page size aligned?

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