Re: out of swap on shutdown

[Patrick Welche <prlw1%cam.ac.uk@localhost>]

On Fri, Aug 15, 2014 at 11:08:12AM +0100, Patrick Welche wrote:
> On shutdown, on machines with a large tmpfs which has been thrashed, I
> see:
> 
> UVM: pid 1029.1 (master), uid 0 killed: out of swap
> UVM: pid 701.1 (qmgr), uid 12 killed: out of swap
...


Any reason not to apply Wolfgang Stukenbrock's patch from PR 41766
which works around this?

Cheers,

Patrick


--- swap1       2009/07/22 12:32:13     1.1
+++ swap1       2009/07/22 12:32:24
@@ -29,6 +29,16 @@
 {
 	if checkyesno swapoff || [ -n "$rc_force" ]; then
 		echo "Removing block-type swap devices"
+#
+#	Check if there is tmpfs present.
+#	The problem is that we my hang in swapctl -U if there
+#	is not enougth physical memory to hold the contents.
+#
+#	Remark: We assume that there are no other mount points inside of tmpfs
+#		and this will not solve the problem for more process memory
+#		than physical memory.
+#
+		umount -aft tmpfs
 		swapctl -U -t blk
 	fi
 }