From: Andrew Morton <akpm@linux-foundation.org>
To: Christoph Lameter <clameter@sgi.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, mpm@selenic.com
Subject: Re: [SLUB 2/2] i386 arch page size slab fixes
Date: Sat, 31 Mar 2007 12:55:36 -0700 [thread overview]
Message-ID: <20070331125536.a984e5ce.akpm@linux-foundation.org> (raw)
In-Reply-To: <20070331193107.1800.28259.sendpatchset@schroedinger.engr.sgi.com>
On Sat, 31 Mar 2007 11:31:07 -0800 (PST) Christoph Lameter <clameter@sgi.com> wrote:
> Fixup i386 arch for SLUB support
>
> i386 arch code currently uses the page struct of slabs for various purposes.
> This interferes with slub and so SLUB has been disabled for i386 by setting
> ARCH_USES_SLAB_PAGE_STRUCT.
>
> This patch removes the use of page sized slabs for maintaining pgds and pmds.
>
> Patch by William Irwin with only very minor modifications by me which are
>
> 1. Removal of HIGHMEM64G slab caches. It seems that virtualization hosts
> require a a full pgd page.
>
> 2. Add missing virtualization hook. Seems that we need a new way
> of serializing paravirt_alloc(). It may need to do its own serialization.
>
> 3. Remove ARCH_USES_SLAB_PAGE_STRUCT
>
> Note that this makes things work without debugging on.
> The arch still fails to boot properly if full SLUB debugging is on with
> a cryptic message:
>
> CPU: AMD Athlon(tm) 64 Processor 3000+ stepping 00
> Checking 'hlt' instruction... OK.
> ACPI: Core revision 20070126
> ACPI: setting ELCR to 0200 (from 1ca0)
> BUG: at kernel/sched.c:3417 sub_preempt_count()
> [<c0342d43>] _spin_unlock_irq+0x13/0x30
> [<c01160e6>] schedule_tail+0x36/0xd0
> [<c0102df8>] __switch_to+0x28/0x180
> [<c0103f9a>] ret_from_fork+0x6/0x1c
> [<c012acf0>] kthread+0x0/0xe0
This all has the potential to make my inbox hurt.
Can we disable SLUB on i386 in Kconfig until it gets sorted out?
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next prev parent reply other threads:[~2007-03-31 19:55 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-31 19:30 [SLUB 0/2] SLUB: The unqueued slab allocator V6 Christoph Lameter
2007-03-31 19:31 ` [SLUB 1/2] SLUB core Christoph Lameter
2007-04-03 7:29 ` Nick Piggin
2007-03-31 19:31 ` [SLUB 2/2] i386 arch page size slab fixes Christoph Lameter
2007-03-31 19:55 ` Andrew Morton [this message]
2007-03-31 20:00 ` Christoph Lameter
2007-04-02 18:30 ` Christoph Lameter
2007-04-02 23:00 ` William Lee Irwin III
2007-04-02 23:02 ` Christoph Lameter
2007-03-31 19:31 ` [SLUB tool] slabinfo: Display slab statistics Christoph Lameter
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