On 2021/4/19 22:57, Michal Kubecek wrote:
> On Mon, Apr 19, 2021 at 10:04:27AM +0800, Yunsheng Lin wrote:
>>>
>>> I tried this patch o top of 5.12-rc7 with real devices. I used two
>>> machines with 10Gb/s Intel ixgbe NICs, sender has 16 CPUs (2 8-core CPUs
>>> with HT disabled) and 16 Rx/Tx queues
On Mon, Apr 19, 2021 at 08:21:38PM +0800, Yunsheng Lin wrote:
> On 2021/4/19 10:04, Yunsheng Lin wrote:
> > On 2021/4/19 6:59, Michal Kubecek wrote:
> >> I tried this patch o top of 5.12-rc7 with real devices. I used two
> >> machines with 10Gb/s Intel ixgbe NICs, sender has 16 CPUs (2 8-core CPUs
On Mon, Apr 19, 2021 at 10:04:27AM +0800, Yunsheng Lin wrote:
> >
> > I tried this patch o top of 5.12-rc7 with real devices. I used two
> > machines with 10Gb/s Intel ixgbe NICs, sender has 16 CPUs (2 8-core CPUs
> > with HT disabled) and 16 Rx/Tx queues, receiver has 48 CPUs (2 12-core
> > CPUs
On 2021/4/19 10:04, Yunsheng Lin wrote:
> On 2021/4/19 6:59, Michal Kubecek wrote:
>> On Thu, Mar 25, 2021 at 11:13:11AM +0800, Yunsheng Lin wrote:
>>> Lockless qdisc has below concurrent problem:
>>> cpu0 cpu1
>>> . .
>>> q->enqueue .
>>
On 2021/4/19 6:59, Michal Kubecek wrote:
> On Thu, Mar 25, 2021 at 11:13:11AM +0800, Yunsheng Lin wrote:
>> Lockless qdisc has below concurrent problem:
>> cpu0 cpu1
>> . .
>> q->enqueue .
>> . .
>> qdisc_run_begi
On Thu, Mar 25, 2021 at 11:13:11AM +0800, Yunsheng Lin wrote:
> Lockless qdisc has below concurrent problem:
> cpu0 cpu1
> . .
> q->enqueue .
> . .
> qdisc_run_begin() .
> . .
> d
On Tue, 13 Apr 2021, Juergen Gross wrote:
> > what Jiri said about "I am still planning to have Yunsheng Lin's
> > (CCing) fix [1] tested in the coming days." is that Juergen has
> > done the test and provide a "Tested-by" tag.
>
> Correct. And I did this after Jiri asking me to do so.
Exactly,
On 13.04.21 11:03, Yunsheng Lin wrote:
On 2021/4/13 16:33, Hillf Danton wrote:
On Tue, 13 Apr 2021 15:57:29 Yunsheng Lin wrote:
On 2021/4/13 15:12, Hillf Danton wrote:
On Tue, 13 Apr 2021 11:34:27 Yunsheng Lin wrote:
On 2021/4/13 11:26, Hillf Danton wrote:
On Tue, 13 Apr 2021 10:56:42 Yunsh
On 2021/4/13 16:33, Hillf Danton wrote:
> On Tue, 13 Apr 2021 15:57:29 Yunsheng Lin wrote:
>> On 2021/4/13 15:12, Hillf Danton wrote:
>>> On Tue, 13 Apr 2021 11:34:27 Yunsheng Lin wrote:
On 2021/4/13 11:26, Hillf Danton wrote:
> On Tue, 13 Apr 2021 10:56:42 Yunsheng Lin wrote:
>> On 2
On 2021/4/13 15:12, Hillf Danton wrote:
> On Tue, 13 Apr 2021 11:34:27 Yunsheng Lin wrote:
>> On 2021/4/13 11:26, Hillf Danton wrote:
>>> On Tue, 13 Apr 2021 10:56:42 Yunsheng Lin wrote:
On 2021/4/13 10:21, Hillf Danton wrote:
> On Mon, 12 Apr 2021 20:00:43 Yunsheng Lin wrote:
>>
On 2021/4/13 11:26, Hillf Danton wrote:
> On Tue, 13 Apr 2021 10:56:42 Yunsheng Lin wrote:
>> On 2021/4/13 10:21, Hillf Danton wrote:
>>> On Mon, 12 Apr 2021 20:00:43 Yunsheng Lin wrote:
Yes, the below patch seems to fix the data race described in
the commit log.
Then what is t
On 2021/4/13 10:21, Hillf Danton wrote:
> On Mon, 12 Apr 2021 20:00:43 Yunsheng Lin wrote:
>>
>> Yes, the below patch seems to fix the data race described in
>> the commit log.
>> Then what is the difference between my patch and your patch below:)
>
> Hehe, this is one of the tough questions over
On 2021/4/12 15:28, Hillf Danton wrote:
> On Mon, 12 Apr 2021 11:37:24 Yunsheng Lin wrote:
>> On 2021/4/12 11:21, Hillf Danton wrote:
>>> On Mon, 12 Apr 2021 09:24:30 Yunsheng Lin wrote:
On 2021/4/9 17:09, Hillf Danton wrote:
> On Fri, 9 Apr 2021 07:31:03 Juergen Gross wrote:
>> On 2
On 12.04.21 03:04, Yunsheng Lin wrote:
On 2021/4/9 13:31, Juergen Gross wrote:
On 25.03.21 04:13, Yunsheng Lin wrote:
Lockless qdisc has below concurrent problem:
cpu0 cpu1
. .
q->enqueue .
. .
qdisc_run
On 2021/4/12 11:21, Hillf Danton wrote:
> On Mon, 12 Apr 2021 09:24:30 Yunsheng Lin wrote:
>> On 2021/4/9 17:09, Hillf Danton wrote:
>>> On Fri, 9 Apr 2021 07:31:03 Juergen Gross wrote:
On 25.03.21 04:13, Yunsheng Lin wrote:
I have a setup which is able to reproduce the issue quite reli
On 2021/4/9 17:09, Hillf Danton wrote:
> On Fri, 9 Apr 2021 07:31:03 Juergen Gross wrote:
>> On 25.03.21 04:13, Yunsheng Lin wrote:
>> I have a setup which is able to reproduce the issue quite reliably:
>>
>> In a Xen guest I'm mounting 8 NFS shares and run sysbench fileio on
>> each of them. The
On 2021/4/9 13:31, Juergen Gross wrote:
> On 25.03.21 04:13, Yunsheng Lin wrote:
>> Lockless qdisc has below concurrent problem:
>> cpu0 cpu1
>> . .
>> q->enqueue .
>> . .
>> qdisc_run_begin() .
>>
On 25.03.21 04:13, Yunsheng Lin wrote:
Lockless qdisc has below concurrent problem:
cpu0 cpu1
. .
q->enqueue .
. .
qdisc_run_begin() .
. .
dequeue_skb() .
Lockless qdisc has below concurrent problem:
cpu0 cpu1
. .
q->enqueue .
. .
qdisc_run_begin() .
. .
dequeue_skb() .
. .
sch_direct_xmit()
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