Thanks Kurt for your confirmation. Best Regards, Jiafei. -----Original Message----- From: Kurt Kanzenbach <kurt.kanzenbach@xxxxxxxxxxxxx> Sent: Saturday, June 20, 2020 4:08 PM To: Vladimir Oltean <olteanv@xxxxxxxxx>; Jiafei Pan <jiafei.pan@xxxxxxx> Cc: linux-rt-users@xxxxxxxxxxxxxxx; lkml <linux-kernel@xxxxxxxxxxxxxxx>; rcu@xxxxxxxxxxxxxxx; Colin King <colin.king@xxxxxxxxxxxxx>; Jiafei Pan <jiafei.pan@xxxxxxx> Subject: Re: [EXT] Re: stress-ng --hrtimers hangs system Caution: EXT Email Hi Jiafei, On Friday, June 12, 2020 2:49:17 AM CEST Jiafei Pan wrote: > Hi, Kurt, > > May I know whether you used "root" user to run stress-ng? using "root" > user will change the scheduler to be "SCHED_RR", so would you please > share test result with root and non-root users? Thanks. Performed the test now as root and non-root user. Same result: No problem. Thanks, Kurt