Dear All
Thanks for your help. I could activate zram0, after doing the mkswap on the device.
These all steps i followed,
echo 50M > /sys/block/zram0/disksize
mkswap /dev/block/zram0
swapon -p 100 /dev/block/zram0
after that, i saw my swap partition is being used. From the stats i saw 44MB RAM data is compressed into 14MB.
But i have a doubt, When i reserve 50M RAM for swap partition, is it like a carve out memory?
i mean Kernel cant use this anymore?
On Sat, May 24, 2014 at 12:31 PM, Chen, Yiqun <feedingfranzy@xxxxxxxxx> wrote:
Um, well that sounds pretty weird.
Have you checked that you've loaded that module? If so, I guess there's
something wrong with modprobe stuff that it didn't mknod for zram, so
try mknod for zram manually.
Check your /dev/block/ directory for the device numbers. On my box it
was 254:0 254:1 which were mapped to my zram0 and zram1 respectively.
Then:
mknod /dev/zram0 b 254 0
It should create a suitable /dev/zram* for you. Then try mkswap-swapon
procedure as others suggest. Please notice that -p argument for swapon is somehow
necessary since on my gentoo box the priority of swap devices is set minus
by default. So your system may not use the zram swap at all even if
you've successfully create the zram device for it.
Please let my know if it still doesn't work :-)
On Fri, May 23, 2014 at 02:51:39PM +0530, sandeep kumar wrote:> *root@kleoslte:/ # swapon -p 100 /dev/block/zram0*
> >>In my system /dev/zram0 is not present but sys/block/zram0 is present.
> thats why i m having this doubt
> just now i found that we have zram0 in /dev/block/zram0
> i tried the command you told,
>
> *swapon -p 100 /dev/block/zram0*
> *swapon failed for /dev/block/zram0*
>
> is there anything else that i can try?
>
>
>
> On Fri, May 23, 2014 at 2:18 PM, sandeep kumar <coolsandyforyou@xxxxxxxxx>wrote:
>
> > Dear Anders
> >
> > >Yes, zram is activated, otherwise you wouldn't have had zram0 created.
> >
> > >Though you might not be using it...
> > >If you want to use it for swap, you'll have to run `swapon -p 100
> > /dev/zram0`.
> > >Well, '-p 100' isn't necessary, it's just to set the swap priority.
> >
> > In my system /dev/zram0 is not present but sys/block/zram0 is present.
> > thats why i m having this doubt
> >
> > thanks
> > sandeep
> >
> >
> > On Thu, May 22, 2014 at 4:56 PM, Anders Darander <
> > anders.darander@xxxxxxxxx> wrote:
> >
> >> On 22 May 2014 12:58, sandeep kumar <coolsandyforyou@xxxxxxxxx> wrote:
> >> > Dear All,
> >> >
> >> > we are trying to make use of zramfs. In our android based board,
> >> > we are seeing this output,
> >> >
> >> > root@sandeep:/sys/block/zram0 # ls
> >>
> >> >
> >> > Does this mean zram is activated ?
> >>
> >> Yes, zram is activated, otherwise you wouldn't have had zram0 created.
> >>
> >> Though you might not be using it...
> >> If you want to use it for swap, you'll have to run `swapon -p 100
> >> /dev/zram0`.
> >> Well, '-p 100' isn't necessary, it's just to set the swap priority.
> >>
> >> > we are trying to do the operation to set disk size,
> >> > echo $((50*1024*1024)) > /sys/block/zram0/disksize
> >>
> >> This should have set the size of zram0.
> >>
> >> Cheers,
> >> Anders
> >>
> >> --
> >> Anders Darander
> >> EPO guidelines 1978: "If the contribution to the known art resides
> >> solely in a computer program then the subject matter is not
> >> patentable in whatever manner it may be presented in the claims."
> >>
> >
> >
> >
> > --
> > With regards,
> > Sandeep Kumar Anantapalli,
> >
>
>
>
> --
> With regards,
> Sandeep Kumar Anantapalli,
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Best regards
Chen, Yiqun
With regards,
Sandeep Kumar Anantapalli,
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