[PATCH v3] hv: hv_fcopy: drop the obsolete message on transfer failure
Jason Wang
jasowang at redhat.com
Wed Jan 14 02:28:00 UTC 2015
On Wed, Jan 14, 2015 at 9:43 AM, Dexuan Cui <decui at microsoft.com> wrote:
>> -----Original Message-----
>> From: Vitaly Kuznetsov [mailto:vkuznets at redhat.com]
>> Sent: Tuesday, January 13, 2015 21:52 PM
>> To: Dexuan Cui; KY Srinivasan
>> Cc: gregkh at linuxfoundation.org; linux-kernel at vger.kernel.org;
>> driverdev-
>> devel at linuxdriverproject.org; olaf at aepfle.de; apw at canonical.com;
>> jasowang at redhat.com; Haiyang Zhang
>> Subject: Re: [PATCH v3] hv: hv_fcopy: drop the obsolete message on
>> transfer
>> failure
>>
>> Dexuan Cui <decui at microsoft.com> writes:
>>
>> > In the case the user-space daemon crashes, hangs or is killed, we
>> > need to down the semaphore, otherwise, after the daemon starts
>> next
>> > time, the obsolete data in fcopy_transaction.message or
>> > fcopy_transaction.fcopy_msg will be used immediately.
>>
>> It seems this patch got lost and I don't see it in recent 'resend'
>> series. K.Y., Dexuan, can you please take a look?
> Hi Vitaly, Jason,
> The patch can't fix all the corner cases (it would need non-trivial
> efforts for that)
> as we discussed, but I think it would be better for us to have it as
> it can indeed fix
> an obvious issue and doesn't introduce new issues.
>
> I think I can document the known discussed corner cases in the patch
> as TODOs
> and resend the patch.
>
> Please let me know if you have different opinions. :-)
>
> Thanks,
> -- Dexuan
Yes, I think it's ok.
We can do other fixes on top.
Thanks
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