From 419f149e482641ddc520f80a7ab2038f7e2ebc8a Mon Sep 17 00:00:00 2001 From: Rui Salvaterra Date: Thu, 30 Jul 2020 13:49:18 +0100 Subject: [PATCH] zram-swap: default to lzo instead of lzo-rle compression On devices with small amounts of RAM, zram-swap fails to initialise due to the default compression algorithm (lzo-rle). Startup example on an AirGrid M2, with 32 MiB of RAM: root@airgrid:/etc/config# /etc/init.d/zram start zram_start: activating '/dev/zram0' for swapping (13 MegaBytes) zram_reset: enforcing defaults via /sys/block/zram0/reset sh: write error: Out of memory mkswap: image is too small swapon: /dev/zram0: Invalid argument root@airgrid:/etc/config# Fix this by defaulting to traditional lzo, which works fine and is always available. Signed-off-by: Rui Salvaterra --- package/system/zram-swap/files/zram.init | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/package/system/zram-swap/files/zram.init b/package/system/zram-swap/files/zram.init index 42c084855ab..bfb92856008 100755 --- a/package/system/zram-swap/files/zram.init +++ b/package/system/zram-swap/files/zram.init @@ -85,8 +85,9 @@ zram_comp_algo() local dev="$1" local zram_comp_algo="$( uci -q get system.@system[0].zram_comp_algo )" - if [ -z "$zram_comp_algo" ] || [ ! -e /sys/block/$( basename $dev )/comp_algorithm ]; then - return 0 + if [ -z "$zram_comp_algo" ]; then + # lzo-rle fails on small RAM devices, default to lzo, which is always available + zram_comp_algo="lzo" fi if [ $(grep -c "$zram_comp_algo" /sys/block/$( basename $dev )/comp_algorithm) -ne 0 ]; then -- 2.30.2