freebsd-skq/sys/i386
cperciva 290c1ef87f Lock the vm page queue mutex in pmap_pte_release around the call
to PMAP_SET_VA; this fixes a mutex-not-held panic when a process
which called mlock(2) exits, and parallels a change made in
pmap_pte 10 months ago (svn r204160).

Note: The locking in this code is utterly broken.  We should not
be using the VM page queue mutex to protect the queue of pending
Xen page mapping hypervisor calls.  Even if it made sense to do
so, this commit and r204160 introduce LORs between the vm page
queue mutex and PMAP2mutex.

(However, a possible deadlock is better than a guaranteed panic,
and this change will hopefully make life easier for whoever fixes
the Xen pmap locking in the future.)

PR:		kern/140313
MFC after:	3 days
2010-12-26 13:05:43 +00:00
..
acpica MFamd64: (based on) r209957 2010-11-12 20:55:14 +00:00
bios Add compat shim for apm(4) to translate APM BIOS function numbers from i386 2010-11-11 19:20:33 +00:00
compile Clone Kip's Xen on stable/6 tree so that I can work on improving FreeBSD/amd64 2008-11-22 16:14:52 +00:00
conf Now userland POSIX semaphore is based on umtx. The kernel module 2010-09-24 09:04:16 +00:00
i386 Redo some parts of r216333, specifically, the locking changes to 2010-12-19 07:31:56 +00:00
ibcs2 Add macro DECLARE_MODULE_TIED to denote a module as requiring the 2010-10-12 09:18:17 +00:00
include Merge amd64 and i386 bus.h and move the resulting header to x86. Replace 2010-12-20 16:39:43 +00:00
isa In fpudna()/npxdna(), mark FPU context initialized and optionally 2010-12-12 16:16:39 +00:00
linux Add macro DECLARE_MODULE_TIED to denote a module as requiring the 2010-10-12 09:18:17 +00:00
pci Add device IDs for two more ServerWorks Host-PCI bridges so that we can 2010-11-25 15:42:33 +00:00
svr4 Change some movl's to mov's. Newer GAS no longer accept 'movl' instructions 2009-01-31 11:37:21 +00:00
xbox Update d_mmap() to accept vm_ooffset_t and vm_memattr_t. 2009-12-29 21:51:28 +00:00
xen Lock the vm page queue mutex in pmap_pte_release around the call 2010-12-26 13:05:43 +00:00
Makefile Clone Kip's Xen on stable/6 tree so that I can work on improving FreeBSD/amd64 2008-11-22 16:14:52 +00:00