Problem: iotop shows small disk writes every 4-5 seconds from chromium. Example output
Total DISK READ: 0.00 B/s | Total DISK WRITE: 0.00 B/s TID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND 258 be/3 root 0.00 B 108.00 K 0.00 % 0.19 % [jbd2/sda6-8] 7541 be/4 kevin 0.00 B 32.00 K 0.00 % 0.01 % chromium-browser 7545 be/4 kevin 0.00 B 8.00 K 0.00 % 0.00 % chromium-browser 15042 be/4 root 0.00 B 64.00 K 0.00 % 0.00 % python /usr/sbin/iotop -bao 7547 be/4 kevin 0.00 B 12.00 K 0.00 % 0.00 % chromium-browser
Things I've been able to find out so far:
running iotop with the -p option indicates that it is the actual browser process doing the io, as opposed to an extension or a tab
jbd2 and chromium-browser writes almost invariably occur together, and closing chromium gets rid of the jbd2 writes, so I'm assuming they are secondary to chromiums io.
In a new browser window, with no tabs open, there are no more writes
Things I've tried which haven't worked:
disabling all extensions: no joy
killing shockwave flash: funnily enough, this seemed to work on one occasion, but has no effect anymore.
relocating chromiums cache directory to a tmpfs! I was sure this would help, but it has not...
adding commit=600 to the drives entry in fstab (in an attempt to mitigate the problem when I thought jbd2 was the problem). didn't work.