[Bug 1788989] Re: rapid and excesive resource use

[Stan Osborne]

PC with problem froze soon after bug was reported.  It had been up for
nearly 2 hours with fir4efox active most or that time.   After rebooting
system was left alone for nearly 6 hours.  It has not frozen.

Soon after logging in the updater ran.  This top report was taken after
updating finished.  firefox was not active at anytime since reboot.

top - 05:57:40 up  4:08,  1 user,  load average: 0.58, 0.79, 0.72
Tasks: 226 total,   1 running, 182 sleeping,   0 stopped,   0 zombie
%Cpu(s):  0.5 us,  0.3 sy,  0.0 ni, 99.2 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
KiB Mem :  3908176 total,  2020852 free,   906648 used,   980676 buff/cache
KiB Swap:  2097148 total,  2097148 free,        0 used.  2513796 avail Mem 

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND                                               
 1288 stan      20   0  375612  61164  35936 S   1.3  1.6   0:06.12 Xorg                                                  
 1428 stan      20   0 3364592 161548  68456 S   1.0  4.1   0:17.17 gnome-shell                                           
 1784 stan      20   0  802724  38400  27816 S   0.7  1.0   0:01.93 gnome-terminal-                                       
 1835 stan      20   0   51308   4320   3544 R   0.3  0.1   0:03.02 top                                                   
 3520 root      20   0       0      0      0 I   0.3  0.0   0:00.38 kworker/0:1                                           
 3529 root      20   0       0      0      0 I   0.3  0.0   0:00.07 kworker/1:1                                           
    1 root      20   0  159888   9260   6828 S   0.0  0.2   0:02.18 systemd                                               
    2 root      20   0       0      0      0 S   0.0  0.0   0:00.00 kthreadd                                              
    4 root       0 -20       0      0      0 I   0.0  0.0   0:00.00 kworker/0:0H                                          
    6 root       0 -20       0      0      0 I   0.0  0.0   0:00.00 mm_percpu_wq                                          
    7 root      20   0       0      0      0 S   0.0  0.0   0:00.44 ksoftirqd/0                                           
    8 root      20   0       0      0      0 I   0.0  0.0   0:03.33 rcu_sched                                             
    9 root      20   0       0      0      0 I   0.0  0.0   0:00.00 rcu_bh                                                
   10 root      rt   0       0      0      0 S   0.0  0.0   0:00.00 migration/0                                           
   11 root      rt   0       0      0      0 S   0.0  0.0   0:00.02 watchdog/0                                            
   12 root      20   0       0      0      0 S   0.0  0.0   0:00.00 cpuhp/0                                               
   13 root      20   0       0      0      0 S   0.0  0.0   0:00.00 cpuhp/1                                               
   14 root      rt   0       0      0      0 S   0.0  0.0   0:00.01 watchdog/1                                            
   15 root      rt   0       0      0      0 S   0.0  0.0   0:00.00 migration/1                                           
   16 root      20   0       0      0      0 S   0.0  0.0   0:00.54 ksoftirqd/1                                           
   18 root       0 -20       0      0      0 I   0.0  0.0   0:00.00 kworker/1:0H                                          
   19 root      20   0       0      0      0 S   0.0  0.0   0:00.00 kdevtmpfs                                             
   20 root       0 -20       0      0      0 I   0.0  0.0   0:00.00 netns                                                 
   21 root      20   0       0      0      0 S   0.0  0.0   0:00.00 rcu_tasks_kthre                                       
   22 root      20   0       0      0      0 S   0.0  0.0   0:00.00 kauditd

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https://bugs.launchpad.net/bugs/1788989

Title:
  rapid and excesive resource use

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