• Colin Cross's avatar
    epoll: use freezable blocking call · 1c441e92
    Colin Cross authored
    Avoid waking up every thread sleeping in an epoll_wait call during
    suspend and resume by calling a freezable blocking call.  Previous
    patches modified the freezer to avoid sending wakeups to threads
    that are blocked in freezable blocking calls.
    
    This call was selected to be converted to a freezable call because
    it doesn't hold any locks or release any resources when interrupted
    that might be needed by another freezing task or a kernel driver
    during suspend, and is a common site where idle userspace tasks are
    blocked.
    Acked-by: default avatarTejun Heo <tj@kernel.org>
    Signed-off-by: default avatarColin Cross <ccross@android.com>
    Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
    1c441e92
eventpoll.c 57.7 KB