wildcat_paris Posted October 9, 2015 Share Posted October 9, 2015 Hello Igor, I am using vanilla 4.4 for labomo-r1 it seems zram module is missing. Do you intend to compile the kernel with this option, please? gr@bpi:~$ sudo modprobe -Rf zram modprobe: FATAL: Module zram not found. On raspbian, kernel 3.18.x-4.1.x, there is a kernel module "zram" useful for embedded systems... working fine (also using on my x86 laptop) https://wiki.gentoo.org/wiki/Zram Nice week-end, Regards, Guillaume 1 Link to comment Share on other sites More sharing options...
wildcat_paris Posted October 9, 2015 Author Share Posted October 9, 2015 btw, the 2013 thread for the raspberry pi https://github.com/raspberrypi/linux/issues/179 Link to comment Share on other sites More sharing options...
Igor Posted October 9, 2015 Share Posted October 9, 2015 I already found and build a kernel ... Will be inside next build. Over and out Thanks! 1 Link to comment Share on other sites More sharing options...
Igor Posted October 9, 2015 Share Posted October 9, 2015 OK, it's already here: with zram and without annoying i2c debugging. http://mirror.igorpecovnik.com/test/linux-image-next-sunxi_4.5_armhf.deb This is a testing version aka release candidate. I didn't add: CONFIG_CLEANCACHE=y CONFIG_FRONTSWAP=y since I discover that later. Is it useful? Link to comment Share on other sites More sharing options...
wildcat_paris Posted October 9, 2015 Author Share Posted October 9, 2015 on the hunt... to try the Armbian 4.5 beta kernel... my feed-back asap Link to comment Share on other sites More sharing options...
wildcat_paris Posted October 9, 2015 Author Share Posted October 9, 2015 Igor, Thanks it is fine with http://mirror.igorpecovnik.com/test/linux-image-next-sunxi_4.5_armhf.deb gr@bpi:~$ cat /proc/version Linux version 4.2.3-sunxi (root@kitchen) (gcc version 4.8.2 (Ubuntu/Linaro 4.8.2-16ubuntu4) ) #16 SMP Fri Oct 9 23:08:18 CEST 2015 gr@bpi:~$ lsmod [...] zram 17790 2 lz4_compress 3201 1 zram gr@bpi:~$ swapon -s Filename Type Size Used Priority /home2/swap file 4999996 0 -1 /dev/zram0 partition 256980 0 5 /dev/zram1 partition 256980 0 5 ok, now testing... compiling thunderbird 42b1 on my "labomo-r1" FTTH home router Edit : Igor, this is an awesome piece of work! :-) Edit 2 : I am not sure if it is really useful here CONFIG_CLEANCACHE=y CONFIG_FRONTSWAP=y Edit 3 : compared to : - (arm) Raspbian : zsmalloc seems to be missing - (x86-amd64) Ubuntu 14.04 : the same as armbian : modules zram + lz4_compress pi@pi ~ $ lsmod Module Size Used by zram 20112 0 lz4_compress 3100 1 zram zsmalloc 10430 1 zram pi@pi ~ $ cat /proc/version Linux version 4.1.10-v7+ (dc4@dc4-XPS13-9333) (gcc version 4.8.3 20140303 (prerelease) (crosstool-NG linaro-1.13.1+bzr2650 - Linaro GCC 2014.03) ) #820 SMP PREEMPT Sun Oct 4 16:26:51 BST 2015 Edit 4: zsmalloc is probably useful : allocate small object to reduce memory fragmentation http://lwn.net/Articles/477067/ zsmalloc is builtin, so ok gr@bpi:~$ sudo modprobe --show-depends zram insmod /lib/modules/4.2.3-sunxi/kernel/lib/lz4/lz4_compress.ko insmod /lib/modules/4.2.3-sunxi/kernel/drivers/block/zram/zram.ko gr@bpi:~$ sudo modprobe --show-depends -v zsmalloc builtin zsmalloc 1 Link to comment Share on other sites More sharing options...
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