Date: Sun, 22 Aug 2004 01:01:55 -0400 From: Brian Fundakowski Feldman <green@FreeBSD.org> To: Alan Cox <alc@cs.rice.edu> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/vm vm_fault.c Message-ID: <20040822050155.GA1007@green.homeunix.org> In-Reply-To: <20040822044936.GJ9106@cs.rice.edu> References: <20040822041018.GA937@green.homeunix.org> <Pine.NEB.3.96L.1040822001718.95496H-100000@fledge.watson.org> <20040822044936.GJ9106@cs.rice.edu>
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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@FreeBSD.org \ The Power to Serve! \ Opinions expressed are my own. \,,,,,,,,,,,,,,,,,,,,,,\
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