Kernel 5.9-rc regression.

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Hi Thomas and list,

There is a strange phenomenon in kernel 5.9-rc: when using kernel 5.9-rc with debian 10 and running htop, the memory footprint will be displayed as 3.99T. When the actual memory footprint increases, the displayed value will be reduced to 3.98T, 3.97T etc. These phenomena have been confirmed in X1000, X1830, and JZ4780 (disable SMP), this phenomenon does not seem to affect the SMP processor. When the JZ4780 turn on SMP, the memory footprint will be displayed normally.


The following is the relevant log:

  CPU[*                         0.7%]   Tasks: 18, 4 thr; 1 running
  Mem[###*****************3.99T/120M]   Load average: 0.02 0.02 0.00
  Swp[                       0K/768M]   Uptime: 00:02:07

  PID USER      PRI  NI  VIRT   RES   SHR S CPU% MEM%   TIME+ Command
 1135 cu-neo     20   0  8872  3152  2724 R  1.3  2.6  0:00.06 htop
    1 root       20   0 16268  7940  6588 S  0.0  6.5  0:02.06 /sbin/init
  512 root       20   0 23932  6188  5408 S  0.0  5.0  0:00.30 /lib/systemd/syst   746 root       20   0 17124  3492  2956 S  0.0  2.8  0:00.17 /lib/systemd/syst   770 systemd-t  20   0 23524  5700  5040 S  0.0  4.6  0:00.02 /lib/systemd/syst   756 systemd-t  20   0 23524  5700  5040 S  0.0  4.6  0:00.22 /lib/systemd/syst   772 root       20   0  8832  2436  2252 S  0.0  2.0  0:00.01 /usr/sbin/cron -f   773 root       20   0 14224  5812  5152 S  0.0  4.7  0:00.14 /lib/systemd/syst   774 messagebu  20   0  7392  4056  3628 S  0.0  3.3  0:00.20 /usr/bin/dbus-dae   775 root       20   0 12256  5096  4644 S  0.0  4.2  0:00.06 /sbin/wpa_supplic   793 root       20   0 25152  3844  3112 S  0.0  3.1  0:00.01 /usr/sbin/rsyslog   794 root       20   0 25152  3844  3112 S  0.0  3.1  0:00.00 /usr/sbin/rsyslog   795 root       20   0 25152  3844  3112 S  0.0  3.1  0:00.02 /usr/sbin/rsyslog   776 root       20   0 25152  3844  3112 S  0.0  3.1  0:00.06 /usr/sbin/rsyslog   821 root       20   0  8576  5492  4632 S  0.0  4.5  0:00.03 /sbin/dhclient -4   868 root       20   0  4524  1856  1748 S  0.0  1.5  0:00.01 /sbin/agetty -o -   871 root       20   0 11524  3820  3348 S  0.0  3.1  0:00.17 /bin/login -p -- F1Help  F2Setup F3SearchF4FilterF5Tree  F6SortByF7Nice -F8Nice +F9Kill  F10Quit




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