RE: kernel ipsec error

On Tue, 2012-06-12 at 08:31 +0200, Marco Berizzi wrote:

bhutchings@solarflare.com wrote:

quoted

On Mon, 2012-06-11 at 14:45 +0200, Marco Berizzi wrote:

quoted

Hello everybody.

After 12 days uptime I got this message.
Linux is 3.3.5 32bit, running openswan
(this is an ipsec gateway/netfilter
firewall) and squid.

Jun 11 12:53:02 Pleiadi kernel: SLUB: Unable to allocate memory on node -1 (gfp=0x20)
Jun 11 12:53:02 Pleiadi kernel: cache: kmalloc-2048, object size: 2048, buffer size: 2048, default order: 2, min order: 0
Jun 11 12:53:02 Pleiadi kernel: node 0: slabs: 61, objs: 476, free: 0
Jun 11 12:53:02 Pleiadi kernel: kworker/0:2: page allocation failure: order:0, mode:0x4020

So a single page allocation in atomic (non-sleeping) context failed.

[...]

quoted

Jun 11 12:53:02 Pleiadi kernel: Free swap = 130908kB
Jun 11 12:53:02 Pleiadi kernel: Total swap = 151164kB
Jun 11 12:53:02 Pleiadi kernel: 40944 pages RAM

[...]

Not too surprising with this little RAM available (swap didn't help
since we couldn't wait for swap-out).

yes, this is really a very old hardware.

quoted

There could be a memory leak, but you would need to read /proc/meminfo
and /proc/slabinfo at intervals to work out whether that was the case.

Kindly, may you tell me which should be the intervals? One second? one minute?

Given that you saw this after 12 days, I would think somewhere between
an hour and a day would be appropriate.

Ben.

-- 
Ben Hutchings, Staff Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.