From 22e2c507c301c3dbbcf91b4948b88f78842ee6c9 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Mon, 27 Jun 2005 10:55:12 +0200 Subject: [PATCH] Update cfq io scheduler to time sliced design This updates the CFQ io scheduler to the new time sliced design (cfq v3). It provides full process fairness, while giving excellent aggregate system throughput even for many competing processes. It supports io priorities, either inherited from the cpu nice value or set directly with the ioprio_get/set syscalls. The latter closely mimic set/getpriority. This import is based on my latest from -mm. Signed-off-by: Jens Axboe Signed-off-by: Linus Torvalds --- kernel/fork.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'kernel/fork.c') diff --git a/kernel/fork.c b/kernel/fork.c index 2c7806873bfd..cdef6cea8900 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1090,6 +1090,11 @@ static task_t *copy_process(unsigned long clone_flags, spin_unlock(¤t->sighand->siglock); } + /* + * inherit ioprio + */ + p->ioprio = current->ioprio; + SET_LINKS(p); if (unlikely(p->ptrace & PT_PTRACED)) __ptrace_link(p, current->parent); -- cgit v1.2.2