From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: bug with 3.4.6, 3.5.3, 3.6.1
Date: Thu, 11 Oct 2012 11:36:37 +0100 [thread overview]
Message-ID: <20121011103637.GC30598@mudshark.cambridge.arm.com> (raw)
In-Reply-To: <50765D3B.6000909@xenomai.org>
On Thu, Oct 11, 2012 at 06:46:35AM +0100, Gilles Chanteperdrix wrote:
> Hi,
Hi Gilles,
> when booting Linux v3.4.6, v3.5.3, or v3.6.1 on a pandaboard with an
> OMAP4430 ES2.1, compiled with the following configuration:
> http://xenomai.org/~gch/config-panda
>
> I get the bug below after mounting the root filesystem.
>
> CONFIG_VMSPLIT_2G and CONFIG_THUMB2_KERNEL disabled seems to be the
> combination which triggers the bug.
>
> With this configuration, it seems the init_mm.mm_count incrementation
> done at the beginning of secondary_start_kernel() is "lost" after the
> calls to cpu_switch_mm() and local_flush_tlb().
>
> Modifying the secondary_startup() function in head.S to pass the
> swapper pgdir instead of the idmap pgdir in r4 also avoids the issue.
What's your PHYS_OFFSET? I suspect it's >= 2GB, in which case I have some
ideas about this problem.
Will
next prev parent reply other threads:[~2012-10-11 10:36 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-11 5:46 bug with 3.4.6, 3.5.3, 3.6.1 Gilles Chanteperdrix
2012-10-11 10:36 ` Will Deacon [this message]
2012-10-11 12:54 ` Gilles Chanteperdrix
2012-10-11 13:32 ` Gilles Chanteperdrix
2012-10-11 13:59 ` Will Deacon
2012-10-11 14:01 ` Gilles Chanteperdrix
2012-10-11 14:03 ` Will Deacon
2012-10-11 19:50 ` Will Deacon
2012-10-11 20:58 ` Gilles Chanteperdrix
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