With 3.8.0-31-lowlatency, try this if you're willing to reboot: rmmod zram; modprobe zram; echo -n 67109999 > /sys/block/zram0/disksize; mkswap /dev/zram0; dmesg -T | tail
It will bring you into a state where you can't rmmod zram (!). # rmmod zram ERROR: Removing 'zram': Device or resource busy I see in dmesg: BUG: unable to handle kernel paging request at 6364652d I tried 67109999 (16k+) after determining that with 67108864 I still get "Buffer I/O error on device zram0" at exactly the last zram0 block. This is a pretty serious problem. It looks like zram-related code is quite unstable. I'm not even sure if it's been fixed on the kernel mainline. A simple backport will probably not solve issues. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1215513 Title: System locks up, requires hard reset To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1215513/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
