From 0acf00014bcfd71090c3b0d43c98e970108064e4 Mon Sep 17 00:00:00 2001 From: Michal Hocko Date: Tue, 27 Sep 2011 08:56:03 +0200 Subject: [PATCH] lguest: move process freezing before pending signals check run_guest tries to freeze the current process after it has handled pending interrupts and before it calls lguest_arch_run_guest. This doesn't work nicely if the task has been killed while being frozen and when we want to handle that signal as soon as possible. Let's move try_to_freeze before we check for pending signal so that we can get out of the loop as soon as possible. Signed-off-by: Michal Hocko Acked-by: Rusty Russell Signed-off-by: Rusty Russell --- drivers/lguest/core.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/drivers/lguest/core.c b/drivers/lguest/core.c index 5c13e93898f..b5fdcb78a75 100644 --- a/drivers/lguest/core.c +++ b/drivers/lguest/core.c @@ -232,6 +232,13 @@ int run_guest(struct lg_cpu *cpu, unsigned long __user *user) } } + /* + * All long-lived kernel loops need to check with this horrible + * thing called the freezer. If the Host is trying to suspend, + * it stops us. + */ + try_to_freeze(); + /* Check for signals */ if (signal_pending(current)) return -ERESTARTSYS; @@ -245,13 +252,6 @@ int run_guest(struct lg_cpu *cpu, unsigned long __user *user) if (irq < LGUEST_IRQS) try_deliver_interrupt(cpu, irq, more); - /* - * All long-lived kernel loops need to check with this horrible - * thing called the freezer. If the Host is trying to suspend, - * it stops us. - */ - try_to_freeze(); - /* * Just make absolutely sure the Guest is still alive. One of * those hypercalls could have been fatal, for example.