[radvd-devel-l] can't join ipv6-allrouters on (Cannot allocate memory) on 285th interface
dwhite at olp.net
Wed Apr 1 09:43:44 EDT 2009
Norman Rasmussen wrote:
> setsockopt doesn't return ENOMEM at any point, so it's either,
> sock_kmalloc in ipv6_sock_mc_join failing or kzalloc in
> ipv6_dev_mc_inc failing. Either way you're running out of kernel
> memory, which is very bad.
> does slabtop show anything interesting?
> another thing to check is is errno zero _before_ the setsockopt call?
> (i.e. is it the setsockopt that's failing, and not just the call
> immediately before it)
> also does it always fails on the same interface? i.e. if you remove
> the first 10 interfaces, does it:
> get to 275 interfaces and die - i.e. it's always failing on the
> same interface
> get to 285 interfaces and die - i.e. it's successfully configured
> the 285th interface (but we skipped the first 10)
I modified the patch like this:
--- device-linux.c.bak 2009-04-01 08:20:26.000000000 -0500
+++ device-linux.c 2009-04-01 08:17:56.000000000 -0500
@@ -178,12 +178,14 @@
mreq.ipv6mr_multiaddr.s6_addr32 = htonl(0x2);
+ errno = 0;
if (setsockopt(sock, SOL_IPV6, IPV6_ADD_MEMBERSHIP, &mreq,
sizeof(mreq)) < 0)
/* linux-2.6.12-bk4 returns error with HUP signal but
keep listening */
if (errno != EADDRINUSE)
flog(LOG_ERR, "can't join ipv6-allrouters on
+ flog(LOG_ERR, "Error %d: %m", errno);
And when starting, I get:
Starting radvd: [Apr 01 08:21:40] radvd: can't join ipv6-allrouters on
[Apr 01 08:21:40] radvd: Error 12: Cannot allocate memory
[Apr 01 08:21:40] radvd: error parsing or activating the config file:
The error is consistent, in that the 285th interface triggers the error.
It does not matter which interface I comment out - I've commented out
the first, the last, several in the middle - as long as I've defined
284, radvd starts.
I have not used slabtop before, so I'm not sure I would notice something
out of the ordinary. I've captured the output of /proc/slabinfo just
before starting radvd, and just after (successfully) starting radvd. You
can find them here:
I also included my complete /etc/radvd.conf, and my debian
/etc/network/interfaces (which includes IP assignments).
I've tried restarting some other daemons - bind, quagga, dibbler, dhcpd.
Even with several of them shut down, I'm still hitting the error on the
I was thinking this could be a resource limit of some sort. I modified
my start script so that radvd runs as the root user (rather than the
radvd user), but same thing. This is the output of 'ulimit -a' as the
root user, just before starting radvd:
north:/etc# ulimit -a
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
max nice (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) unlimited
max locked memory (kbytes, -l) unlimited
max memory size (kbytes, -m) unlimited
open files (-n) 1024
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) unlimited
max rt priority (-r) 0
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) unlimited
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
I tried increasing the stack size (ulimit -s 16384) but that didn't help.
I have not tried restarting the system however.
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the radvd-devel-l