From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Haren Myneni <haren@us.ibm.com>
Cc: linuxppc-dev@ozlabs.org, Paul Mackerras <paulus@samba.org>
Subject: Re: [PATCH] powerpc: EOI and clear IPI fix in xics_teardown_cpu()
Date: Sun, 09 Jul 2006 11:37:07 +1000 [thread overview]
Message-ID: <1152409027.4128.14.camel@localhost.localdomain> (raw)
In-Reply-To: <44B05BD0.304@us.ibm.com>
On Sat, 2006-07-08 at 18:28 -0700, Haren Myneni wrote:
> If OK, please sent this patch to upstream.
>
> Thanks
> Haren
>
> When invoked kdump boot, plpar_eoi() call is getting failed and calling
> panic().
> Kernel panic - not syncing: bad return code EOI - rc = -4, value=ff000000
>
> The issue is with the desc->chip->eoi(XICS_IPI) in xics_teardown_cpu().
> Instead of passing the virq to desc->chip->eoi(), XICS_IPI is used.
> Also, clear IPI in xics_teardown_cpu() got removed recently (in
> 2.6.17-git25). Noticed in some crash dump cases (Ex: initiate kdump
> boot using soft-reset and xmon is enabled), IPI is not cleared for some
> CPU(s) before starting the kdump boot. Hence, causing the kdump boot
> failure.
It's already fixed in my latest patch that fixes some issues with the
new irq rework. Hopefully, paul will send the patch upstream tomorrow
after we had a chance to test it a bit more.
Cheers,
Ben
next prev parent reply other threads:[~2006-07-09 1:37 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-09 1:28 [PATCH] powerpc: EOI and clear IPI fix in xics_teardown_cpu() Haren Myneni
2006-07-09 1:37 ` Benjamin Herrenschmidt [this message]
2006-07-09 2:17 ` Haren Myneni
2006-07-09 4:08 ` Benjamin Herrenschmidt
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