From a24864a1d52a97e345a6bd4862a057f98364d098 Mon Sep 17 00:00:00 2001 From: Lepton Wu Date: Tue, 16 Oct 2007 01:27:35 -0700 Subject: uml: definitively kill subprocesses on panic In a stock 2.6.22.6 kernel, poweroff a user mode linux guest (2.6.22.6 running in skas0 mode) will halt the host linux. I think the reason is the kernel thread abort because of a bug. Then the sys_reboot in process of user mode linux guest is not trapped by the user mode linux kernel and is executed by host. I think it is better to make sure all of our children process to quit when user mode linux kernel abort. [ jdike - the kernel process needs to ignore SIGTERM, plus the waitpid/kill loop is needed to make sure that all of our children are dead before the kernel exits ] Signed-off-by: Lepton Wu Signed-off-by: Jeff Dike Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/um/os-Linux/skas/process.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/um/os-Linux/skas') diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c index e60d6e6c5a5..d77c81d7068 100644 --- a/arch/um/os-Linux/skas/process.c +++ b/arch/um/os-Linux/skas/process.c @@ -177,7 +177,7 @@ static int userspace_tramp(void *stack) ptrace(PTRACE_TRACEME, 0, 0, 0); - init_new_thread_signals(); + signal(SIGTERM, SIG_DFL); err = set_interval(); if (err) panic("userspace_tramp - setting timer failed, errno = %d\n", -- cgit v1.2.3