Date: Sun, 1 Jul 2012 12:23:31 +0000 From: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net> To: current@FreeBSD.org Subject: swp_pager_meta_build DoS printf Message-ID: <7BEE3948-EE35-48C2-B4B1-25E34087A4C4@lists.zabbadoz.net>
index | next in thread | raw e-mail
Hey,
hitting this printf in swp_pager_meta_build()
if (uma_zone_exhausted(swap_zone)) {
printf("swap zone exhausted, increase kern.maxswzone\n");
vm_pageout_oom(VM_OOM_SWAPZ);
pause("swzonex", 10);
} else
seems to be an effective way to put the machine into a state of no recovery
unless the memory situation would be able to clear itself. Not that it wouldn't
otherwise be any better but in addition having a couple of tenthousands of these
going to console as well is really not helpful to try to do anything either. Can
we make it a log() call or something?
/bz
PS: I am not sure as I have seen it on someone else's machines and it's
probably been ZFS that caused it. I unfortunately neither had a way to
get back in or break to a kernel debugger, so information is sparse.
--
Bjoern A. Zeeb You have to have visions!
It does not matter how good you are. It matters what good you do!
help
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?7BEE3948-EE35-48C2-B4B1-25E34087A4C4>