Subject: Re: deadlock with sched_lock in SA code
To: Chuck Silvers <firstname.lastname@example.org>
From: Jason Thorpe <email@example.com>
Date: 08/28/2005 12:20:11
On Aug 28, 2005, at 8:17 AM, Chuck Silvers wrote:
> allocating pages from UVM can call wakeup(), so we must avoid that
> while holding sched_lock. one way to do this would be to call
> sadata_upcall_alloc() before acquiring sched_lock and passing the
> resulting pointer to sa_switch(), instead of calling that in
> sa_switch() itself. does anyone have any better suggestions?
> if not, I'll fix it that way.
That sounds reasonable.
It would be nice to put some assertions in place to prevent this from