On Sun, Dec 27, 2020 at 10:08:51PM +0800, Lai Jiangshan wrote:
> On Sat, Dec 26, 2020 at 10:52 PM Paul E. McKenney wrote:
>
> > >
> > > Can you please specify a bit what you encountered in rcutorture
> > > before this patchset? You know we cant have a correct estimation
> > > of the fix diameter
On Sat, Dec 26, 2020 at 10:52 PM Paul E. McKenney wrote:
> >
> > Can you please specify a bit what you encountered in rcutorture
> > before this patchset? You know we cant have a correct estimation
> > of the fix diameter without your help.
>
> It triggers the following in sched_cpu_dying() in
On Sat, Dec 26, 2020 at 06:34:21PM +0800, Hillf Danton wrote:
> On Wed, 23 Dec 2020 11:49:51 -0800 "Paul E. McKenney" wrote:
> >On Sat, Dec 19, 2020 at 01:09:09AM +0800, Lai Jiangshan wrote:
> >> From: Lai Jiangshan
> >>
> >> 06249738a41a ("workqueue: Manually break affinity on hotplug")
> >>
> From: Dexuan Cui
> Sent: Wednesday, December 23, 2020 12:27 PM
> ...
> The warning only repros if there are more than 1 node, and it only prints once
> for the first vCPU of the second node (i.e. node #1).
A correction: if I configure the 32 vCPUs evenly into 4 nodes, I get the warning
once for
> From: Lai Jiangshan
> Sent: Wednesday, December 23, 2020 7:02 AM
> >
> > Hi,
> > I tested this patchset on today's tip.git's master branch
> > (981316394e35 ("Merge branch 'locking/urgent'")).
> >
> > Every time the kernel boots with 32 CPUs (I'm running the Linux VM on
> > Hyper-V), I get the
On Sat, Dec 19, 2020 at 01:09:09AM +0800, Lai Jiangshan wrote:
> From: Lai Jiangshan
>
> 06249738a41a ("workqueue: Manually break affinity on hotplug")
> said that scheduler will not force break affinity for us.
>
> But workqueue highly depends on the old behavior. Many parts of the codes
>
On Wed, Dec 23, 2020 at 5:39 AM Dexuan-Linux Cui wrote:
>
> On Fri, Dec 18, 2020 at 8:11 AM Lai Jiangshan wrote:
> >
> > From: Lai Jiangshan
> >
> > 06249738a41a ("workqueue: Manually break affinity on hotplug")
> > said that scheduler will not force break affinity for us.
> >
> > But workqueue
On Wed, Dec 23, 2020 at 5:39 AM Dexuan-Linux Cui wrote:
>
> On Fri, Dec 18, 2020 at 8:11 AM Lai Jiangshan wrote:
> >
> > From: Lai Jiangshan
> >
> > 06249738a41a ("workqueue: Manually break affinity on hotplug")
> > said that scheduler will not force break affinity for us.
> >
> > But workqueue
On Fri, Dec 18, 2020 at 8:11 AM Lai Jiangshan wrote:
>
> From: Lai Jiangshan
>
> 06249738a41a ("workqueue: Manually break affinity on hotplug")
> said that scheduler will not force break affinity for us.
>
> But workqueue highly depends on the old behavior. Many parts of the codes
> relies on
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