Messages in this thread | | | Subject | Re: Kernel WARNING: at net/core/dev.c:1330 __netif_schedule+0x2c/0x98() | From | Peter Zijlstra <> | Date | Thu, 24 Jul 2008 12:08:56 +0200 |
| |
On Thu, 2008-07-24 at 02:32 -0700, David Miller wrote: > From: Peter Zijlstra <peterz@infradead.org> > Date: Thu, 24 Jul 2008 11:27:05 +0200 > > > Well, not only lockdep, taking a very large number of locks is expensive > > as well. > > Right now it would be on the order of 16 or 32 for > real hardware. > > Much less than the scheduler currently takes on some > of my systems, so currently you are the pot calling the > kettle black. :-)
One nit, and then I'll let this issue rest :-)
The scheduler has a long lock dependancy chain (nr_cpu_ids rq locks), but it never takes all of them at the same time. Any one code path will at most hold two rq locks.
| |