Re: [PATCH V13 0/9] VF EEH on Power8

[Wei Yang <weiyang@linux.vnet.ibm.com>]

On Mon, Nov 09, 2015 at 10:53:17AM +1100, Alexey Kardashevskiy wrote:
>On 11/08/2015 10:30 AM, Wei Yang wrote:
>>This patchset enables EEH on SRIOV VFs. The general idea is to create proper
>>VF edev and VF PE and handle them properly.
>>
>>Different from the Bus PE, VF PE just contain one VF. This introduces the
>>difference of EEH error handling on a VF PE. Generally, it has several
>>differences.
>>
>>First, the VF's removal and re-enumerate rely on its PF. VF has a tight
>>relationship between its PF. This is not proper to enumerate a VF by usual
>>scan procedure. That's why virtfn_add/virtfn_remove are exported in this patch
>>set.
>>
>>Second, the reset/restore of a VF is done in kernel space. FW is not aware of
>>the VF, this means the usual reset function done in FW will not work. One of
>>the patch will imitate the reset/restore function in kernel space.
>>
>>Third, the VF may be removed during the PF's error_detected function. In this
>>case, the original error_detected->slot_reset->resume sequence is not proper
>>to those removed VFs, since they are re-created by PF in a fresh state. A flag
>>in eeh_dev is introduce to mark the eeh_dev is in error state. By doing so, we
>>track whether this device needs to be reset or not.
>>
>>This has been tested both on host and in guest on Power8 with latest kernel
>>version.
>
>
>This does not apply on top of neither Linus master tree
>(git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git sha1
>ce5c2d2) nor Michael's PPC next tree
>(git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git sha1
>8bdf2023). What did you base your work on?
>

I didn't based this on the latest code.

This is based on v4.3, commit "6a13feb Linux 4.3".

>
>-- 
>Alexey

-- 
Richard Yang
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