I double-check it. Function show_state_filter chooses to print all tasks when state_filter == 0 (TASK_RUNNING). sysrq_sched_debug_show prints per cpu sched debug info.
They are different info. It is better to use sched_debug_enabled to control the 2nd part output. Yanmin -----Original Message----- From: Zhang, Yanmin Sent: Tuesday, April 26, 2016 9:04 AM To: Afzal Mohammed; Zhang, LongX Cc: [email protected]; [email protected]; [email protected] Subject: RE: [PATCH] sched: don't output cpu sched info by default Thanks for the pointer. We didn't notice that. That patch also fixes the issue indeed. Yanmin -----Original Message----- From: Afzal Mohammed [mailto:[email protected]] Sent: Monday, April 25, 2016 6:50 PM To: Zhang, LongX Cc: [email protected]; [email protected]; [email protected]; Zhang, Yanmin Subject: Re: [PATCH] sched: don't output cpu sched info by default Hi, On Mon, Apr 25, 2016 at 01:04:41PM +0800, Zhang Long wrote: > Android userspace debug prcoess might dump system info by sysrq. > One info is of cpu sched. Usually, one thread has one line dump. > Such log is huge sometimes and such dumping spends lots of time and > make the system worse. Sometimes, watchdog resets the system in the > end. > > The patch fixes it by dumping cpu sched info only when > sched_debug_enabled is true. Doesn't "sched: don't dump sched debug info in SysRq-W" currently in tip/sched/core help ?, http://lkml.kernel.org/r/[email protected] Regards afzal
