Alan Cox 031102cc7b Use an atomic op to update the pte in pmap_protect(). This is to prevent ... the loss of a page modified (PG_M) bit in a race between processors. Quoting Tor: One scenario where the old code could cause a lost PG_M bit is a multithreaded linux program (or FreeBSD program using the linuxthreads port) where one thread was starting a subprocess. The thread doing fork() would call vmspace_fork(), which would then call vm_map_copy_entry() which would call pmap_protect() on an area possibly accessed by other threads. Additionally, make the clearing of PG_M by pmap_protect() unconditional if write permission is removed. Previously, PG_M could persist on a read-only unmanaged page. That seems inconsistent and confusing. In collaboration with: tegge@ MT5 candidate PR: 61852		2004-09-12 20:20:40 +00:00
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acpica	Sync with i386 - get the softc via the devclass rather than caching the dev	2004-08-16 23:10:18 +00:00
amd64	Use an atomic op to update the pte in pmap_protect(). This is to prevent	2004-09-12 20:20:40 +00:00
compile	Make space for compilations.	2002-07-06 02:49:07 +00:00
conf	Add device driver support for the VIA Networking Technologies	2004-09-10 20:57:46 +00:00
ia32	Remove sched_free_thread() which was only used	2004-08-31 06:12:13 +00:00
include	Double the number of kernel page tables for amd64 and for i386/PAE. The old	2004-09-11 01:31:26 +00:00
isa	Sync with i386 - Optimize intr_execute_handlers a bit etc.	2004-08-16 23:12:30 +00:00
linux32	Give setrunqueue() and sched_add() more of a clue as to	2004-09-01 02:11:28 +00:00
pci	Add missing <sys/module.h> instances which were shadowed by the nested	2004-06-03 05:58:30 +00:00
Makefile	This commit adds basic support for the UFS2 filesystem. The UFS2	2002-06-21 06:18:05 +00:00