On Mon, Aug 11, 2014 at 10:34:04PM +0200, Benno Schulenberg wrote:
>
> On Mon, Aug 11, 2014, at 22:23, Benno Schulenberg wrote:
> > The zram devices size is page size aligned. When
> > -requested
> > -.I size
> > -does match with page size the device be large enough to hold the reqested
> > -.I size
> > -plus length to next page boundary.
>
> The above does not parse for me. I am not in a position to test
> zram devices, so to be sure that my replacement text is correct,
# modprobe zram
# ./zramctl --find --size $((4096 * 1000 + 100 ))
/dev/zram0
# echo $(( 4096 * 1000 + 100))
4096100
# ./zramctl --bytes -n -o DISKSIZE
4100096
> the following question: when one passes with --size a number that
> is not a multiple of the memory-page size, does a subsequent call
> of 'zramctl --raw' then print the aligned (rounded-up) number, or
> does it still print the size that was specified although in fact
> the aligned, bigger number is being used?
The kernel uses the aligned $size and nowhere is stored the original
size, so zramctl returns the aligned (rounded-up) number.
Karel
--
Karel Zak <kzak@xxxxxxxxxx>
http://karelzak.blogspot.com
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