Re: General protection fault in iscsi_rx_thread_pre_handler

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Hi Nicholas,

On Thu, Feb 12, 2015 at 3:16 PM, Nicholas A. Bellinger
<nab@xxxxxxxxxxxxxxx> wrote:
> Hi Gavin,
>
> On Tue, 2015-02-03 at 08:28 +0800, Gavin Guo wrote:
>> Hi Nicholas,
>>
>> On Sun, Feb 1, 2015 at 11:47 AM, Gavin Guo <gavin.guo@xxxxxxxxxxxxx> wrote:
>> > Hi Nicholas,
>> >
>> > On Sat, Jan 31, 2015 at 6:53 AM, Nicholas A. Bellinger
>> > <nab@xxxxxxxxxxxxxxx> wrote:
>> >> On Fri, 2015-01-23 at 09:30 +0800, Gavin Guo wrote:
>> >>> Hi Nicholas,
>> >>>
>> >>> On Fri, Jan 23, 2015 at 1:35 AM, Nicholas A. Bellinger
>> >>> <nab@xxxxxxxxxxxxxxx> wrote:
>> >>> > On Thu, 2015-01-22 at 23:56 +0800, Gavin Guo wrote:
>> >>> >> Hi Nicolas,
>> >>> >>
>> >>> >> On Thu, Jan 22, 2015 at 5:50 PM, Nicholas A. Bellinger
>
> <SNIP>
>
>> >>> >> > At the time, a different set of iser-target related changes ended up
>> >>> >> > avoiding this issue on his particular setup, so we thought it was likely
>> >>> >> > a race triggered by login failures specific to iser-target code.
>> >>> >> >
>> >>> >> > There was a untested patch (included inline below) to drop the legacy
>> >>> >> > active_ts_list usage all-together, but IIRC he was not able to reproduce
>> >>> >> > further so the patch didn't get picked up for mainline.
>> >>> >> >
>> >>> >> > If your able to reliability reproduce, please try with the following
>> >>> >> > patch and let us know your progress.
>> >>> >>
>> >>> >> Thanks for your time reading the mail. I'll let you know the result.
>> >>> >
>> >>> > Just curious, are you able to reliability reproduce this bug in a VM..?
>> >>>
>> >>> Thanks for your caring, the machine is on the customer side, I've
>> >>> asked and now waiting for their response.
>> >>
>> >> Hi Gavin,
>> >>
>> >> Just curious if there has been any update on this yet..?
>> >>
>> >> --nab
>> >>
>> >
>> > Really thanks for your attention. I'm also currently waiting for the
>> > customer's reply and will send the email again to ask for the result.
>> > However, I think the symptom may be hard to replicate that's why the
>> > customer didn't reply me for a long time. Thanks for your time again.
>> >
>> > Thanks,
>> > Gavin
>>
>> Sorry for making you wait so long. I just got the response from the
>> customer, they said the general protection fault happened just 2 times
>> in the past and cannot be reliably reproduced. And I am now waiting
>> for the verification test.
>>
>
> Just a heads up that I'm planning to include this patch in the v3.20-rc1
> PULL request.
>
> Please let me know if you have any objections.
>
> Thank you,
>
> --nab
>

The bug
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