On Thu, Sep 15, 2016 at 4:55 PM, Jo-Philipp Wich <j...@mein.io> wrote: > > Hi, > > can you check whether it is maybe caused by > > http://git.lede-project.org/5c9cc7b7f8920944a413644e1c2ea23bfe655bcb ? > > > Its just a hunch.
Could be part of the problem, it looks like memory reserved by vm.min_free_kbytes can not be used from userspace. In CC15 it's only 681kb. The official docs say anything below 1024kb will be a problem[1] # sysctl -w vm.min_free_kbytes=681 vm.min_free_kbytes = 681 root@zoellnerzwo:~ cat /proc/meminfo | grep ^Mem MemTotal: 29220 kB MemFree: 6116 kB MemAvailable: 9320 kB # sysctl -w vm.min_free_kbytes=4096 vm.min_free_kbytes = 4096 root@zoellnerzwo:~ cat /proc/meminfo | grep ^Mem MemTotal: 29220 kB MemFree: 6128 kB MemAvailable: 3676 kB Also the difference in MemAvailable (5644) appers to be bigger than the difference in values (3415). If only the value from MemAvailable is usable from userspace that could be the issue. I have to do more testing through, this was just a quick look on a CC15 Freifunk Router. regards Martin 1: https://www.kernel.org/doc/Documentation/sysctl/vm.txt Some minimal amount of memory is needed to satisfy PF_MEMALLOC allocations; if you set this to lower than 1024KB, your system will become subtly broken, and prone to deadlock under high loads. _______________________________________________ Lede-dev mailing list Lede-dev@lists.infradead.org http://lists.infradead.org/mailman/listinfo/lede-dev
