On 2015/12/24 13:15, Jeremiah Mahler wrote:
> Jiang,
>
> On Wed, Dec 23, 2015 at 10:13:26PM +0800, Jiang Liu wrote:
>> Function __assign_irq_vector() makes use of apic_chip_data.old_domain
>> as a temporary buffer, which causes trouble to rollback logic in case of
>> failure. So use a dedicated temporary buffer for __assign_irq_vector().
>>
>> Signed-off-by: Jiang Liu <jiang....@linux.intel.com>
>> ---
>> arch/x86/kernel/apic/vector.c | 9 +++++----
>> 1 file changed, 5 insertions(+), 4 deletions(-)
> [...]
>
> I tried this patch and the rest in the series but unfortunately
> the bug is still present.
>
> [ 10.184649] wlan0: authenticated
> [ 10.187883] wlan0: associate with 02:1a:11:fb:90:1c (try 1/3)
> [ 10.191574] do_IRQ: 0.35 No irq handler for vector
> [ 10.191589] do_IRQ: 0.35 No irq handler for vector
> [ 10.198159] do_IRQ: 0.35 No irq handler for vector
> [ 10.198165] do_IRQ: 0.35 No irq handler for vector
> [ 10.200534] wlan0: RX AssocResp from 02:1a:11:fb:90:1c (capab=0x431
> status=0 aid=1)
> [ 10.204611] wlan0: associated
> [ 10.238883] do_IRQ: 0.35 No irq handler for vector
> [ 10.238892] do_IRQ: 0.35 No irq handler for vector
> [ 10.280716] do_IRQ: 0.35 No irq handler for vector
> [ 10.281083] do_IRQ: 0.35 No irq handler for vector
> [ 10.286484] do_IRQ: 0.35 No irq handler for vector
> ...
>
Hi Jeremiah,
Could you please help to confirm which commit caused the
regression?
1) x86/irq: Do not reuse struct apic_chip_data.old_domain as temporary
buffer
2) x86/irq: Fix a race condition between vector assigning and cleanup
Thanks,
Gerry
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