From: Eugene Surovegin <ebs@ebshome.net>
To: Karol Lewandowski <kl@jasmine.eu.org>
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: [BUG] ibm_emac: kernel panic with CONFIG_SLOB=y
Date: Tue, 1 Aug 2006 15:13:42 -0700 [thread overview]
Message-ID: <20060801221342.GA13171@gate.ebshome.net> (raw)
In-Reply-To: <20060801204011.GB1754@riddly.domek.prywatny>
On Tue, Aug 01, 2006 at 10:40:11PM +0200, Karol Lewandowski wrote:
> Hi,
>
> I'm getting reproductible kernel panic when I use smaller SLOB
> allocator (instead of SLAB). This is reproductible but very randomly
> -- sometimes it happens during bootup, sometimes few minutes later.
>
> Hardware is custom board with IBM405EP (very close to Bubingna, just
> no RTC):
>
> # cat /proc/cpuinfo
> processor : 0
> cpu : 405EP
> clock : 200MHz
> revision : 9.80 (pvr 5121 0950)
> bogomips : 199.47
> machine : MagicBox
> plb bus clock : 100MHz
> pci bus clock : 25MHz
>
> Enabling SLAB instead of SLOB fixes this, so I assume this is driver
> issue.
This is probably the same issue I had with SLAB debugging.
In short, those allocators aren't compatible with non-coherent cache
archs (like 4xx), because driver assumes at least L1 cache line
alignment for all allocated memory.
For more info, you can read this post:
http://ozlabs.org/pipermail/linuxppc-embedded/2006-February/022087.html
--
Eugene
next prev parent reply other threads:[~2006-08-01 22:13 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-01 20:40 [BUG] ibm_emac: kernel panic with CONFIG_SLOB=y Karol Lewandowski
2006-08-01 22:13 ` Eugene Surovegin [this message]
2006-08-01 23:35 ` Karol Lewandowski
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