On Tuesday, October 11, 2011, Jeff Layton wrote: > On Tue, 11 Oct 2011 08:18:48 +0200 > Pavel Machek <pavel@xxxxxx> wrote: > > > > > Hi! > > > > > TASK_KILLABLE is often used to put tasks to sleep for quite some time. > > > One of the most common uses is to put tasks to sleep while waiting for > > > replies from a server on a networked filesystem (such as CIFS or NFS). > > > > > > Unfortunately, fake_signal_wake_up does not currently wake up tasks > > > that are sleeping in TASK_KILLABLE state. This means that even if the > > > code were in place to allow them to freeze while in this sleep, it > > > wouldn't work anyway. > > > > > > This patch changes this function to wake tasks in this state as well. > > > This should be harmless -- if the code doing the sleeping doesn't have > > > handling to deal with freezer events, it should just go back to sleep. > > > > I'm pretty sure this will break something; but that does not mean it > > is bad idea, just that it should be merged early and tested a lot. > > > > FWIW, I looked at most of the places in the kernel that do > TASK_KILLABLE sleeps and they look like they'll handle this correctly. > The main one I wasn't sure about was mem_cgroup_handle_oom(), but I > think it'll do the right thing too. I certainly could have missed > something though... > > In any case, would you mind merging this via the linux-pm tree for 3.2? I will push it for 3.2. Thanks, Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
