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alc 87de22f863 Remove a broken micro-optimization from pmap_enter(). The ill effect 
of this micro-optimization occurs when we call pmap_enter() to wire an
already mapped page.  Because of the micro-optimization, we fail to
mark the PTE as wired.  Later, on teardown of the address space,
pmap_remove_pages() destroys the PTE before vm_fault_unwire() has
unwired the page.  (pmap_remove_pages() is not supposed to destroy
wired PTEs.  They are destroyed by a later call to pmap_remove().)
Thus, the page becomes lost.

Note: The page is not lost if the application called munlock(2), only
if it relies on teardown of the address space to unwire its pages.

For the historically inclined, this bug was introduced by a
megacommit, revision 1.182, roughly six years ago.

Leak observed by: green@ and dillon independently
Patch submitted by: dillon at backplane dot com
Reviewed by: tegge@
MFC after: 1 week
2004-05-28 19:42:02 +00:00
..
alpha Retire cpu_sched_exit(); it is not used any more. 2004-05-26 12:09:39 +00:00
amd64 Remove a broken micro-optimization from pmap_enter(). The ill effect 2004-05-28 19:42:02 +00:00
arm Retire cpu_sched_exit(); it is not used any more. 2004-05-26 12:09:39 +00:00
boot Use the correct location of the EBDA for searching for the RSDP. 2004-05-25 05:52:48 +00:00
cam Quirk for Neuros USB audio device. 2004-05-02 19:24:23 +00:00
coda Device megapatch 5/6: 2004-02-21 21:32:15 +00:00
compat Small timer cleanups: 2004-04-30 20:51:55 +00:00
conf First release of ixgb driver for the Intel(R) PRO/10GbE Family of Adapters. This driver has 2004-05-28 00:23:00 +00:00
contrib This commit was generated by cvs2svn to compensate for changes in r129694, 2004-05-25 03:06:37 +00:00
crypto
ddb Fixed DDB_NOKLDSYM on amd64's: 2004-05-18 05:30:06 +00:00
dev Don't assume that the current setting (_CRS) of a PCI link device is 2004-05-28 17:31:32 +00:00
fs Switch from using the vnode interlock to a private mutex in fifo_open() 2004-05-17 20:16:40 +00:00
geom Dump some more informations: 2004-05-26 11:36:27 +00:00
gnu Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
i4b Convert callers to the new bus_alloc_resource_any(9) API. 2004-03-17 17:50:55 +00:00
i386 Remove a broken micro-optimization from pmap_enter(). The ill effect 2004-05-28 19:42:02 +00:00
ia64 Retire cpu_sched_exit(); it is not used any more. 2004-05-26 12:09:39 +00:00
isa Move fdc from isa/fd.c to dev/fdc/fdc.c. The old files were 2004-05-17 05:46:16 +00:00
isofs/cd9660 Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
kern Sysctl hw.bus.devctl_disable shouldn't be writtable from inside a jail. 2004-05-26 16:36:32 +00:00
libkern Import libkern arm specific bits. 2004-05-14 12:28:31 +00:00
modules First release of ixgb driver for the Intel(R) PRO/10GbE Family of Adapters. This driver has 2004-05-28 00:23:00 +00:00
net if_printf() won't emit a newline unless told to. 2004-05-26 11:41:26 +00:00
net80211 Link state change notification of ethernet media to the routing socket. 2004-05-05 15:48:06 +00:00
netatalk Remove redundant call to soisdisconnected() from ddp_abort(), as it 2004-05-05 03:34:37 +00:00
netatm These are changes to allow to use the Intel C/C++ compiler (lang/icc) 2004-03-12 21:45:33 +00:00
netgraph Move to generating pccarddevs.h on the fly, both for the kernel and 2004-05-26 00:53:10 +00:00
netinet Add a super-user check to ipfw_ctl() to make sure that the calling 2004-05-25 15:02:12 +00:00
netinet6 Fix a bug which I discovered recently while doing IPv6 testing at 2004-05-14 03:57:17 +00:00
netipsec use correct address for SADB_EXT_ADDRESS_DST in key_do_allocsa_policy 2004-05-03 05:15:53 +00:00
netipx Rename dup_sockaddr() to sodupsockaddr() for consistency with other 2004-03-01 03:14:23 +00:00
netkey
netnatm Rename dup_sockaddr() to sodupsockaddr() for consistency with other 2004-03-01 03:14:23 +00:00
netncp Make the process_exit eventhandler run without Giant. Add Giant hooks 2004-03-14 02:06:28 +00:00
netsmb Rename dup_sockaddr() to sodupsockaddr() for consistency with other 2004-03-01 03:14:23 +00:00
nfs Remove advertising clause from University of California Regent's 2004-04-07 05:00:01 +00:00
nfs4client Remove advertising clause from University of California Regent's 2004-04-07 20:46:16 +00:00
nfsclient Make vm_page's PG_ZERO flag immutable between the time of the page's 2004-05-06 05:03:23 +00:00
nfsserver Call nfsm_clget_nolock() instead of nfsm_clget() when holding the NFS 2004-05-27 20:34:04 +00:00
opencrypto kthread_exit() no longer requires Giant, so don't force callers to acquire 2004-03-05 22:42:17 +00:00
pc98 MFi386: revision 1.1160. 2004-05-18 11:56:56 +00:00
pccard Convert callers to the new bus_alloc_resource_any(9) API. 2004-03-17 17:50:55 +00:00
pci Wrap the code to save/restore PCI config registers on suspend/resume in 2004-05-24 19:39:23 +00:00
posix4
powerpc Retire cpu_sched_exit(); it is not used any more. 2004-05-26 12:09:39 +00:00
rpc Remove advertising clause from University of California Regent's 2004-04-07 05:00:01 +00:00
security Remove dead code. (This loop counted the number of rules, but the count 2004-05-15 20:55:19 +00:00
sparc64 Retire cpu_sched_exit(); it is not used any more. 2004-05-26 12:09:39 +00:00
sys Style. 2004-05-28 14:20:06 +00:00
tools devlist2h.awk is too generic a name for what it does. It really 2004-05-26 00:19:39 +00:00
ufs Upon further review it was decided this piece of the msync(2) 2004-05-21 12:05:48 +00:00
vm MFS: vm_map.c rev 1.187.2.27 through 1.187.2.29, fix MS_INVALIDATE 2004-05-25 18:40:53 +00:00
Makefile Try harder not to compile anything in sys/boot for arm. 2004-05-16 00:19:12 +00:00