with 5c9cc7b7f8920944a413644e1c2ea23bfe655bcb we changed the default
value of 'vm.min_free_kbytes' from ~650 to 4096 kilobytes on 32MiB-RAM-devices.
This makes them hardly useable with a lot of OOM-crashes.
Change that and use 1024 kilobytes for 32MiB-RAM-devices.
For devices with more than 32MiB RAM we keep the behaviour / the values.
While we are at it, localize vars and read the memory without AWK/nonforking.
changes v1 -> v2: (suggestions from Felix Fietkau, Rafał Miłecki)
- keep -quiet option from sysctl
- use 1024 kilobyte on 32MiB-devices instead of the kernel default
- consistently use unit [MiB]
---
package/base-files/files/etc/init.d/sysctl | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/package/base-files/files/etc/init.d/sysctl
b/package/base-files/files/etc/init.d/sysctl
index a0daec0..7a16e01 100755
--- a/package/base-files/files/etc/init.d/sysctl
+++ b/package/base-files/files/etc/init.d/sysctl
@@ -4,16 +4,20 @@
START=11
set_vm_min_free() {
- mem="$(grep MemTotal /proc/meminfo | awk '{print $2}')"
- if [ "$mem" -gt 65536 ]; then # 128M
+ local mem value
+
+ read -r _ mem _ </proc/meminfo
+
+ if [ "$mem" -gt 65536 ]; then # 128MiB
val=16384
- elif [ "$mem" -gt 32768 ]; then # 64M
+ elif [ "$mem" -gt 32768 ]; then # 64MiB
val=8192
- elif [ "$mem" -gt 16384 ]; then # 32M
- val=4096
+ elif [ "$mem" -gt 16384 ]; then # 32MiB
+ val=1024
else
return
fi
+
sysctl -qw vm.min_free_kbytes="$val"
}
--
2.7.4
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