Re: [linus:master] [mm] 01b9da291c: stress-ng.switch.ops_per_sec 67.7% regression

On Sun, May 17, 2026 at 12:38:48PM -0700, Shakeel Butt wrote:
> On Sun, May 17, 2026 at 08:55:50PM +0800, Oliver Sang wrote:
> > hi, Shakeel, hi, Qi,
> > 
> > #2: when we test above patch, we found the server easy to crash while running
> > tests. we try to run up to 20 times, only 2 of them run successfully (above
> > 37739220 is just the average data from these 2 runs, since the data is stable,
> > we think maybe it's ok to report to you with this data).
> > we also noticed for [1] there is a [syzbot ci] report in [2]. since we don't
> > have serial output for our test server in this report which is for performance
> > tests, we cannot say if other 18 runs failed due to similar reason. just FYI.
> > 
> 
> The syzbot report is simply a rcu warning which will be fixed in v2. Do you
> have more details on the crash you are seeing? Is it page counter underflow
> warning?
> 
> Thanks again for the help.

Hi Oliver, it seems like sashiko found another issue with v2, so, if you have
not yet started the test, you can skip it.

Also I am rethinking the approach, so I will send a prototype in response on
this email for which I will need your help in testing.