zram: Read before write: sector=8388480, size=4096

[GoogleCodeExporter]

nfsroot-3.24

Booting wtih 9nbd and zram, we get this messages in the console.

zram: There is little point creating a zram of greater than twice the size of 
memory since we expect a 2:1 compression ratio. Note that zram uses about 0.1% 
of the size of the disk when not in use so a huge zram is wasteful.
    Memory Size: 1913836 kB
    Size you selected: 4294967296 kB
Continuing anyway ...
zram: Initialization done!
EXT4-fs (dm-0): mounted filesystem with ordered data mode. Opts: 
udev: starting version 147
zram: Read before write: sector=8388480, size=4096
zram: Read before write: sector=8388592, size=4096
zram: Read before write: sector=8, size=4096
zram: Read before write: sector=8388600, size=4096
zram: Read before write: sector=8388344, size=4096
zram: Read before write: sector=8388544, size=4096
zram: Read before write: sector=8388352, size=4096
zram: Read before write: sector=8388208, size=4096
zram: Read before write: sector=2048, size=4096
zram: Read before write: sector=24, size=4096
zram: Read before write: sector=56, size=4096
zram: Read before write: sector=120, size=4096
zram: Read before write: sector=16, size=4096
zram: Read before write: sector=128, size=4096
zram: Read before write: sector=64, size=4096
zram: Read before write: sector=256, size=4096
zram: Read before write: sector=264, size=4096
zram: Read before write: sector=272, size=4096
zram: Read before write: sector=280, size=4096
zram: Read before write: sector=288, size=4096
zram: Read before write: sector=296, size=4096
zram: Read before write: sector=304, size=4096
zram: Read before write: sector=312, size=4096
zram: Read before write: sector=320, size=4096
zram: Read before write: sector=328, size=4096
zram: Read before write: sector=336, size=4096
zram: Read before write: sector=344, size=4096
zram: Read before write: sector=352, size=4096
zram: Read before write: sector=360, size=4096
zram: Read before write: sector=368, size=4096
...

zram: Read before write: sector=1016, size=4096
zram: Read before write: sector=512, size=4096
zram: Read before write: sector=32, size=4096
zram: Read before write: sector=4096, size=4096

Original issue reported on code.google.com by garlick....@gmail.com on 8 May 2013 at 4:19