On Wed, Oct 19, 2016 at 06:31:12PM +0200, Christoph Hellwig wrote: > On Wed, Oct 19, 2016 at 08:34:40AM -0700, Andy Lutomirski wrote: > > > > It would be quite awkward for a task stack to get freed from a > > sleepable context, because the obvious sleepable context is the task > > itself, and it still needs its stack. This was true even in the old > > regime when task stacks were freed from RCU context. > > > > But vfree has a magic automatic deferral mechanism. Couldn't you make > > the non-deferred case might_sleep()? > > But it's only magic from interrupt context.. > > Chris, does this patch make virtually mapped stack work for you again?
So far, so good. No warns from anyone else. -Chris -- Chris Wilson, Intel Open Source Technology Centre
