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Opened 6 years ago

Closed 6 years ago

Last modified 4 years ago

#11017 closed defect (no_response)

kworker using 25/30% of CPU since upgrade to 3.2.5

Reported by: anonymous Owned by: developers
Priority: normal Milestone: Barrier Breaker 14.07
Component: kernel Version: Trunk
Keywords: kworker Cc:

Description

Hardware: TL-WR1043ND
USB HDD: Hitachi Touro Mobile Pro 500GB USB 3.0

Filesystem: EXT4
Swap: 96 MB

My USB HDD was very slow work after kernel upgrade to 3.2.5.

Read speed of FTP 6-7 MB/s. Backfire 10.03.1 - 13 MB /s.

minidlna for indexing works very slowly. In this process kworker constantly consume a lot of resources.

$ uname -a
Linux OpenWrt 3.2.5 #1 Thu Feb 16 03:18:13 MST 2012 mips GNU/Linux

$ top
Mem: 24304K used, 5088K free, 0K shrd, 444K buff, 1516K cached
CPU:   0% usr  93% sys   3% nic   0% idle   2% io   0% irq   0% sirq
Load average: 5.82 5.09 4.12 5/52 4440
  PID  PPID USER     STAT   VSZ %VSZ %CPU COMMAND
 4409     2 root     SW       0   0%  32% [kworker/u:1]
 4320     2 root     SW       0   0%  26% [kworker/u:0]
 4434  3868 root     R     1500   5%   9% top
 1112     1 root     R     1480   5%   6% hostapd -P /var/run/wifi-phy0.pid -B
 1808     1 root     S     1620   6%   5% /usr/sbin/pppd plugin rp-pppoe.so mtu
 3389     1 nobody   S      940   3%   5% /usr/sbin/dnsmasq -K -D -y -Z -b -E -
 4406  4403 root     R N  22832  78%   5% /usr/bin/minidlna
  452     2 root     RW       0   0%   3% [usb-storage]
    4     2 root     SW       0   0%   3% [kworker/0:0]
  166     2 root     SW       0   0%   2% [mtdblock2]
 3668  2067 root     S     1216   4%   1% /usr/sbin/dropbear -P /var/run/dropbe
 4403     1 root     S     9088  31%   1% /usr/bin/minidlna
   81     2 root     DW       0   0%   1% [kswapd0]
 2880     1 root     D     2964  10%   0% /usr/sbin/racoon -f /var/racoon/racoo
    3     2 root     SW       0   0%   0% [ksoftirqd/0]
 2195     1 root     S     1604   5%   0% {dynamic_dns_upd} /bin/sh /usr/lib/dd
 1998     1 root     S     1512   5%   0% /usr/sbin/crond -c /etc/crontabs -L /
  703     1 root     S     1508   5%   0% /sbin/syslogd -l 8 -C16
 3868  3668 root     S     1508   5%   0% -ash
    1     0 root     S     1504   5%   0% init

Attachments (0)

Change History (3)

comment:1 Changed 6 years ago by florian

Can you try this patch: https://lwn.net/Articles/478459/?

comment:2 Changed 6 years ago by nbd

  • Resolution set to no_response
  • Status changed from new to closed

comment:3 Changed 4 years ago by jow

  • Milestone changed from Attitude Adjustment 12.09 to Barrier Breaker 14.07

Milestone Attitude Adjustment 12.09 deleted

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