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| author | Michal Hocko <mhocko@suse.cz> | 2011-09-27 08:56:03 +0200 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2011-10-27 10:56:18 +1030 |
| commit | 0acf00014bcfd71090c3b0d43c98e970108064e4 (patch) | |
| tree | fcd5be7a9def49cd31cdd23c4ddafe4bd0e48ac9 | |
| parent | 89cfc99177c9270c5c6d429f6c5177ab3428ad57 (diff) | |
| download | linux-0acf00014bcfd71090c3b0d43c98e970108064e4.tar.gz linux-0acf00014bcfd71090c3b0d43c98e970108064e4.tar.bz2 linux-0acf00014bcfd71090c3b0d43c98e970108064e4.zip | |
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 <mhocko@suse.cz>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
| -rw-r--r-- | 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 5c13e93898f9..b5fdcb78a75b 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. */ |