cvs commit: src/sys/vm vm_fault.c

[Brian Fundakowski Feldman]

On Sat, Aug 21, 2004 at 11:49:36PM -0500, Alan Cox wrote:
> On Sun, Aug 22, 2004 at 12:18:49AM -0400, Robert Watson wrote:
> > 
> > On Sun, 22 Aug 2004, Brian Fundakowski Feldman wrote:
> > 
> > > Also, it was the system_map lock, so it was a mutex, not an sx. 
> > > 
> > > /Goes back to trying to figure out wtf portupgrade -rR kde\* keeps
> > > causing
> > >  hangs, but only in X, not at the command line, and not seemingly
> > >  dependant on AGP/X driver. 
> > 
> > I believe mutexes are alright also as long as you're careful about
> > sleeping and lock order.  I.e., don't sleep while holding a
> > non-funnel-like mutex, etc.
> > 
> 
> We should never page fault on a system map.  If that happens to you,
> it indicates an error.  (In-kernel maps on which we do page fault,
> such as the pipe submap, are treated the same as user maps and utilize
> an sx lock.)

vm_fault
vm_fault_wire
vm_map_wire
kmem_alloc
vm_ksubmap_init
cpu_startup
mi_startup

-- 
Brian Fundakowski Feldman                           \'[ FreeBSD ]''''''''''\
  <> green at FreeBSD.org                               \  The Power to Serve! \
 Opinions expressed are my own.                       \,,,,,,,,,,,,,,,,,,,,,,\