This is an attempt to reduce the stack footprint of various functions (those using any of the wait_event_* macros), by removing the need to allocate a wait_queue_t on the stack and instead use a single instance embedded in task_struct. I'm not really sure where the best place to put it is; I just placed it next to other list bookkeeping fields.
For now, there is a little unconditional debugging. This could later be removed or maybe be made dependent on some CONFIG_* variable. The idea of using ->flags is taken from Pavel [1] (I originally stored (void*)1 into ->private). Compiles, but not actually tested. [1] http://thread.gmane.org/gmane.linux.kernel/1720670 Rasmus Villemoes (2): wait: Introduce per-task wait_queue_t wait: Use the per-task wait_queue_t in ___wait_event macro include/linux/sched.h | 23 +++++++++++++++++++++++ include/linux/wait.h | 18 ++++++++++-------- kernel/fork.c | 1 + 3 files changed, 34 insertions(+), 8 deletions(-) -- 1.9.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
