[PATCH 1/2] lguest: move process freezing before pending signals check
From: Michal Hocko <hidden>
Date: 2011-09-27 18:10:57
Subsystem:
the rest · Maintainer:
Linus Torvalds
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 <redacted> Acked-by: Rusty Russell <redacted> --- drivers/lguest/core.c | 14 +++++++------- 1 files changed, 7 insertions(+), 7 deletions(-)
diff --git a/drivers/lguest/core.c b/drivers/lguest/core.c
index 2535933..e7dda91 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;
@@ -246,13 +253,6 @@ int run_guest(struct lg_cpu *cpu, unsigned long __user *user) 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. */
--
1.7.5.4
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