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[Konrad Hofer <konrad.hofer@xxxxxxxx>]

Public bug reported:

I use zram as swap device, but get Buffer I/O errors when creating a
swap device.

1. modprobe zram
2. echo 2097152000 > /sys/block/zram0/disksize
3. mkswap /dev/zram0

tail /varlog/syslog

Aug 29 12:07:01 ubz10035sev kernel: [ 1044.003716] Buffer I/O error on device zram0, logical block 511999
Aug 29 12:07:01 ubz10035sev kernel: [ 1044.005792] Buffer I/O error on device zram0, logical block 511999
Aug 29 12:07:01 ubz10035sev kernel: [ 1044.007918] Buffer I/O error on device zram0, logical block 511999
Aug 29 12:07:01 ubz10035sev kernel: [ 1044.009930] Buffer I/O error on device zram0, logical block 511999
Aug 29 12:07:01 ubz10035sev kernel: [ 1044.011965] Buffer I/O error on device zram0, logical block 511999
Aug 29 12:07:01 ubz10035sev kernel: [ 1044.012917] Buffer I/O error on device zram0, logical block 511999
Aug 29 12:07:01 ubz10035sev kernel: [ 1044.013793] Buffer I/O error on device zram0, logical block 511999
Aug 29 12:07:01 ubz10035sev kernel: [ 1044.014680] Buffer I/O error on device zram0, logical block 511999
Aug 29 12:07:01 ubz10035sev kernel: [ 1044.015542] Buffer I/O error on device zram0, logical block 511999
Aug 29 12:07:01 ubz10035sev kernel: [ 1044.016395] Buffer I/O error on device zram0, logical block 511999

cat /proc/version_signature
Ubuntu 3.8.0-29.42-generic 3.8.13.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "lspci -vnvn"
   https://bugs.launchpad.net/bugs/1218278/+attachment/3792833/+files/lspci-vnvn.log

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https://bugs.launchpad.net/bugs/1218278

Title:
  When creating a swap device using zram I get Buffer I/O errors

Status in “linux” package in Ubuntu:
  New

Bug description:
  I use zram as swap device, but get Buffer I/O errors when creating a
  swap device.

  1. modprobe zram
  2. echo 2097152000 > /sys/block/zram0/disksize
  3. mkswap /dev/zram0

  tail /varlog/syslog

  Aug 29 12:07:01 ubz10035sev kernel: [ 1044.003716] Buffer I/O error on device zram0, logical block 511999
  Aug 29 12:07:01 ubz10035sev kernel: [ 1044.005792] Buffer I/O error on device zram0, logical block 511999
  Aug 29 12:07:01 ubz10035sev kernel: [ 1044.007918] Buffer I/O error on device zram0, logical block 511999
  Aug 29 12:07:01 ubz10035sev kernel: [ 1044.009930] Buffer I/O error on device zram0, logical block 511999
  Aug 29 12:07:01 ubz10035sev kernel: [ 1044.011965] Buffer I/O error on device zram0, logical block 511999
  Aug 29 12:07:01 ubz10035sev kernel: [ 1044.012917] Buffer I/O error on device zram0, logical block 511999
  Aug 29 12:07:01 ubz10035sev kernel: [ 1044.013793] Buffer I/O error on device zram0, logical block 511999
  Aug 29 12:07:01 ubz10035sev kernel: [ 1044.014680] Buffer I/O error on device zram0, logical block 511999
  Aug 29 12:07:01 ubz10035sev kernel: [ 1044.015542] Buffer I/O error on device zram0, logical block 511999
  Aug 29 12:07:01 ubz10035sev kernel: [ 1044.016395] Buffer I/O error on device zram0, logical block 511999

  cat /proc/version_signature
  Ubuntu 3.8.0-29.42-generic 3.8.13.

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