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Groups > linux.kernel > #1706417

Re: Switching to MQ by default may generate some bug reports

From Ming Lei <tom.leiming@gmail.com>
Newsgroups linux.kernel
Subject Re: Switching to MQ by default may generate some bug reports
Date 2017-08-08 14:00 +0200
Message-ID <ucbkZ-7TS-7@gated-at.bofh.it> (permalink)
References (5 earlier) <uaSX8-4qq-15@gated-at.bofh.it> <ubUau-3mF-25@gated-at.bofh.it> <uca5z-71u-9@gated-at.bofh.it> <ucafg-767-19@gated-at.bofh.it> <ucaRX-7FO-5@gated-at.bofh.it>
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On Tue, Aug 8, 2017 at 7:27 PM, Mel Gorman <mgorman@techsingularity.net> wrote:
> On Tue, Aug 08, 2017 at 06:43:03PM +0800, Ming Lei wrote:
>> Hi Mel Gorman,
>>
>> On Tue, Aug 8, 2017 at 6:30 PM, Mel Gorman <mgorman@techsingularity.net> wrote:
>> ....
>> >
>> > o I've queued a subset of tests with Ming's v3 patchset as that was the
>> >   latest branch at the time I looked. It'll take quite some time to execute
>> >   as the grid I use to collect data is backlogged with other work
>>
>> The latest patchset is in the following post:
>>
>>       http://marc.info/?l=linux-block&m=150191624318513&w=2
>>
>> And you can find it in my github:
>>
>>       https://github.com/ming1/linux/commits/blk-mq-dispatch_for_scsi.V4
>>
>
> Unfortunately, the tests were queued last Friday and are partially complete
> depending on when machines become available. As it is, v3 will take a few
> days to complete and a requeue would incur further delays. If you believe
> the results will be substantially different then I'll discard v3 and requeue.

Firstly V3 on github(never posted out) causes boot hang if CPU cores is >= 16,
so you need to check if the test is still running, :-(

Also V3 on github may not perform well on IB SRP(or other low latency
SCSI disk), so
I improve bio merge in V4 and make IB SRP's perf better too, and it depends on
devices.

I suggest to focus on V2 posted in mail list(V4 in github).

-- 
Ming Lei

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Thread

Switching to MQ by default may generate some bug reports Mel Gorman <mgorman@techsingularity.net> - 2017-08-03 11:00 +0200
  Re: Switching to MQ by default may generate some bug reports Ming Lei <tom.leiming@gmail.com> - 2017-08-03 11:20 +0200
    Re: Switching to MQ by default may generate some bug reports Ming Lei <tom.leiming@gmail.com> - 2017-08-03 11:40 +0200
    Re: Switching to MQ by default may generate some bug reports Mel Gorman <mgorman@techsingularity.net> - 2017-08-03 11:50 +0200
      Re: Switching to MQ by default may generate some bug reports Paolo Valente <paolo.valente@linaro.org> - 2017-08-03 11:50 +0200
        Re: Switching to MQ by default may generate some bug reports Mel Gorman <mgorman@techsingularity.net> - 2017-08-03 12:50 +0200
      Re: Switching to MQ by default may generate some bug reports Ming Lei <tom.leiming@gmail.com> - 2017-08-03 12:10 +0200
        Re: Switching to MQ by default may generate some bug reports Mel Gorman <mgorman@techsingularity.net> - 2017-08-03 12:50 +0200
          Re: Switching to MQ by default may generate some bug reports Ming Lei <tom.leiming@gmail.com> - 2017-08-03 13:50 +0200
  Re: Switching to MQ by default may generate some bug reports Paolo Valente <paolo.valente@linaro.org> - 2017-08-03 11:30 +0200
    Re: Switching to MQ by default may generate some bug reports Mel Gorman <mgorman@techsingularity.net> - 2017-08-03 13:10 +0200
      Re: Switching to MQ by default may generate some bug reports Paolo Valente <paolo.valente@linaro.org> - 2017-08-04 09:30 +0200
        Re: Switching to MQ by default may generate some bug reports Mel Gorman <mgorman@techsingularity.net> - 2017-08-04 13:10 +0200
          Re: Switching to MQ by default may generate some bug reports Paolo Valente <paolo.valente@linaro.org> - 2017-08-05 00:10 +0200
            Re: Switching to MQ by default may generate some bug reports Mel Gorman <mgorman@techsingularity.net> - 2017-08-05 14:00 +0200
              Re: Switching to MQ by default may generate some bug reports Paolo Valente <paolo.valente@linaro.org> - 2017-08-07 19:40 +0200
            Re: Switching to MQ by default may generate some bug reports Paolo Valente <paolo.valente@linaro.org> - 2017-08-07 19:40 +0200
              Re: Switching to MQ by default may generate some bug reports Paolo Valente <paolo.valente@linaro.org> - 2017-08-07 20:50 +0200
                Re: Switching to MQ by default may generate some bug reports Paolo Valente <paolo.valente@linaro.org> - 2017-08-08 10:10 +0200
                Re: Switching to MQ by default may generate some bug reports Paolo Valente <paolo.valente@linaro.org> - 2017-08-08 19:40 +0200
                Re: Switching to MQ by default may generate some bug reports Mel Gorman <mgorman@techsingularity.net> - 2017-08-08 20:30 +0200
                Re: Switching to MQ by default may generate some bug reports Paolo Valente <paolo.valente@linaro.org> - 2017-08-09 23:50 +0200
                Re: Switching to MQ by default may generate some bug reports Mel Gorman <mgorman@techsingularity.net> - 2017-08-10 10:50 +0200
              Re: Switching to MQ by default may generate some bug reports Mel Gorman <mgorman@techsingularity.net> - 2017-08-08 12:40 +0200
                Re: Switching to MQ by default may generate some bug reports Ming Lei <tom.leiming@gmail.com> - 2017-08-08 12:50 +0200
                Re: Switching to MQ by default may generate some bug reports Mel Gorman <mgorman@techsingularity.net> - 2017-08-08 13:30 +0200
                Re: Switching to MQ by default may generate some bug reports Ming Lei <tom.leiming@gmail.com> - 2017-08-08 14:00 +0200
                Re: Switching to MQ by default may generate some bug reports Mel Gorman <mgorman@techsingularity.net> - 2017-08-08 14:00 +0200
                Re: Switching to MQ by default may generate some bug reports Paolo Valente <paolo.valente@linaro.org> - 2017-08-08 19:20 +0200

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