[PATCH] powerpc: EOI and clear IPI fix in xics_teardown_cpu()
Haren Myneni
haren at us.ibm.com
Sun Jul 9 12:17:58 EST 2006
Benjamin Herrenschmidt wrote:
>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
>
>
>
Ok, Are you talking about the patch posted
http://ozlabs.org/pipermail/linuxppc-dev/2006-July/024350.html? Sorry, I
did not notice it before I posted. Yes, it is fixed passing proper ipi
value to desc->chip->eoi(). But, we also to need to clear IPI in
xics_teardown_cpu().
Thanks
Haren
-------------- next part --------------
A non-text attachment was scrubbed...
Name: ppc64-kdump-clear-IPI-fix.patch
Type: text/x-patch
Size: 545 bytes
Desc: not available
URL: <http://lists.ozlabs.org/pipermail/linuxppc-dev/attachments/20060708/ecb7c438/attachment.bin>
More information about the Linuxppc-dev
mailing list