On Wed, Mar 06, 2013 at 04:50:39PM +0100, Oleg Nesterov wrote: > On 03/05, Andrew Morton wrote: > > > > Basically the same as > > http://ozlabs.org/~akpm/mmots/broken-out/drivers-platform-x86-thinkpad_acpic-move-hotkey_thread_mutex-lock-after-set_freezable.patch. > > I think Artem's patch is a little better. There doesn't appear to be > > any locking protocol for tpacpi_lifecycle. > > Which seems to have the same problem, hotkey_kthread() still calls > kthread_freezable_should_stop() under hotkey_thread_mutex. > > IOW, we have two try_to_freeze's here, the patch moves only one of > them outside of the hotkey_thread_mutex. It's hard for me to judge but this lock does indeed look like it has been used to block until the thread exits. I'm trying out the "remove hotkey_thread_mutex completely" approach and everything looks fine so far. -- Regards, Artem -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
