On Tue, Aug 13, 2013 at 01:04:01PM +0100, Richard W.M. Jones wrote:
> OK, I understand what's going wrong and how to reproduce the
> signal-to-parent problem. It does look like a bug in vmlinux.
>
> It happens if the init process (PID 1) inside the VM gets a segfault.
To add an additional data-point, applying the attached patch causes
the rogue SIGTERM-to-parent signal to disappear. So at least we know
where it comes from!
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
virt-p2v converts physical machines to virtual machines. Boot with a
live CD or over the network (PXE) and turn machines into KVM guests.
http://libguestfs.org/virt-v2v
>From 73e2153039803d6f8cec7425ae501f857d9523a9 Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjo...@redhat.com>
Date: Tue, 13 Aug 2013 13:24:32 +0100
Subject: [PATCH] COMMENT OUT KILL SIGTERM
---
arch/um/os-Linux/util.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/um/os-Linux/util.c b/arch/um/os-Linux/util.c
index 492ef5e..a0f308e 100644
--- a/arch/um/os-Linux/util.c
+++ b/arch/um/os-Linux/util.c
@@ -108,7 +108,7 @@ void os_dump_core(void)
*/
signal(SIGTERM, SIG_IGN);
- kill(0, SIGTERM);
+ //kill(0, SIGTERM);
/*
* Most of the other processes associated with this UML are
* likely sTopped, so give them a SIGCONT so they see the
--
1.8.3.1
------------------------------------------------------------------------------
Get 100% visibility into Java/.NET code with AppDynamics Lite!
It's a free troubleshooting tool designed for production.
Get down to code-level detail for bottlenecks, with <2% overhead.
Download for free and get started troubleshooting in minutes.
http://pubads.g.doubleclick.net/gampad/clk?id=48897031&iu=/4140/ostg.clktrk
_______________________________________________
User-mode-linux-devel mailing list
User-mode-linux-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
