Edge Router Lite runs out of memory on buildworld

[Wolfgang Zenker]

Hi,

* Wolfgang Zenker <wolfgang at lyxys.ka.sub.org> [151013 05:22]:
> for a few months now I have been building CURRENT on an Edge Router Lite,
> last successful build was about a week ago:

> % uname -a
> FreeBSD pomona 11.0-CURRENT FreeBSD 11.0-CURRENT #10: Wed Oct  7 07:15:47 CEST 2015     wolfgang at pomona:/usr/obj/usr/src/sys/UBQTERL  mips

> Today buildworld failed with the system running out of memory
> on building libc.so:
[..]

> Kernel is built with "options NO_SWAPPING", so there is no swap space at all.
> I will try again without tmpfs now, to see if this frees enough memory.

strangely enough, with /tmp on flash instead of a ramdisk, it fails
a bit earlier: compiling the first sourcefile of libc:

[..]
echo libc.so.7: /usr/obj/usr/src/tmp/usr/lib/libcompiler_rt.a /usr/obj/usr/src/tmp/usr/lib/libssp_nonshared.a >> .depend
cc   -O -pipe -G0   -I/usr/src/lib/libc/include -I/usr/src/lib/libc/../../include -I/usr/src/lib/libc/mips -DNLS  -DSOFTFLOAT -D__DBINTERFACE_PRIVATE -I/usr/src/lib/libc/../../contrib/gdtoa -I/usr/src/lib/libc/../../contrib/libc-vis -DINET6 -I/usr/obj/usr/src/lib/libc -I/usr/src/lib/libc/resolv -D_ACL_PRIVATE -DPOSIX_MISTAKE -I/usr/src/lib/libc/../libmd -I/usr/src/lib/libc/../../contrib/jemalloc/include -I/usr/src/lib/libc/../../contrib/tzcode/stdtime -I/usr/src/lib/libc/stdtime  -I/usr/src/lib/libc/locale -DBROKEN_DES -DPORTMAP -DDES_BUILTIN -I/usr/src/lib/libc/rpc -I/usr/src/lib/libc/mips/softfloat  -I/usr/src/lib/libc/softfloat -DSOFTFLOAT_FOR_GCC -DYP -DNS_CACHING -DSYMBOL_VERSIONING -std=gnu99 -Wsystem-headers -Werror -Wall -Wno-format-y2k -Wno-uninitialized -Wno-pointer-sign   -I/usr/src/lib/libutil -I/usr/src/lib/msun/mips -I/usr/src/lib/msun/src -c /usr/src/lib/libc/db/btree/bt_close.c -o bt_close.o
Killed
*** Error code 137

% dmesg
pid 20537 (make), uid 0, was killed: out of swap space
Oct 13 11:19:31 pomona kernel: pid 20537 (make), uid 0, was killed: out of swap space

Maybe the memory used for the tmpfs before is not being returned even 
after unmonting /tmp? I will try again with a reboot after commenting
out /tmp in fstab.

Wolfgang