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Konstantin Belousov 85d76c38ba Simplify flow of pmap_demote_pde_locked() and add more comprehensive
debugging checks.

In particular,
- Move the code to handle failure to allocate page table page into
  a helper.
- After the previous item is done, it is possible to distinguish !PG_A
  case and case of missed page, in the control flow.
- Make the variable to indicate that in-kernel mapping is demoted.
- Assert that missed page table page can only happen for in-kernel
  mapping when demoting direct map.
- If DIAGNOSTIC is enabled, and the page table page should be already
  filled, check all ptes instead of only first one.

Reviewed by:	alc, markj
Tested by:	pho (previous version)
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D20266
2019-05-31 18:53:04 +00:00
bin Convert freebsd-version to using -v 2019-05-23 17:19:00 +00:00
cddl Hook up the existing i386 DTrace tests to the build. 2019-05-22 03:42:03 +00:00
contrib readelf: Make -t imply -S, for compatibility with GNU binutils. 2019-05-30 18:54:34 +00:00
crypto Complete LOCAL_PEERCRED support. Cache pid of the remote process in the 2019-05-30 14:24:26 +00:00
etc Move back group, master.passwd and shells to etc directory 2019-05-23 18:37:05 +00:00
gnu [PPC] Enable build/install of ld.bfd on base 2019-05-20 16:00:32 +00:00
include Import OpenSSL 1.1.1c. 2019-05-28 20:08:17 +00:00
kerberos5 Add WITH_PIE knob to build Position Independent Executables 2019-02-15 22:22:38 +00:00
lib libelftc: Add MLINKS. 2019-05-30 19:18:01 +00:00
libexec Correctly align usage: output 2019-05-25 11:22:49 +00:00
release Revert r348438. 2019-05-31 18:40:19 +00:00
rescue rescue: set NO_SHARED in Makefile 2018-11-19 22:18:18 +00:00
sbin acpi_dock(4): Notify devd(8) on dock status change. 2019-05-31 15:44:33 +00:00
secure Merge OpenSSL 1.1.1c. 2019-05-28 21:54:12 +00:00
share Add Sergio Carlavilla (myself) to the committers doc, Gabor is going to be my mentor Approved by: gabor 2019-05-30 21:39:49 +00:00
stand stand: zfs: Free bouncebuf on error path in vdev_read 2019-05-31 17:44:22 +00:00
sys Simplify flow of pmap_demote_pde_locked() and add more comprehensive 2019-05-31 18:53:04 +00:00
targets Remove kgzip and kgzldr. 2019-05-24 05:34:21 +00:00
tests Remove tests for the deprecated algorithms in r348206 2019-05-31 04:29:29 +00:00
tools nanobsd: exclude .git (and .hg) in the same places we exclude .svn 2019-05-24 15:21:23 +00:00
usr.bin Minor tweaks to the layout. 2019-05-30 16:02:40 +00:00
usr.sbin Whitespace cleanups, no functional change. 2019-05-31 18:00:44 +00:00
.arcconfig callsign isn't required anymore 2016-09-29 06:19:45 +00:00
.arclint arc lint: ignore /tests/ in chmod 2017-12-19 03:38:06 +00:00
.cirrus.yml Cirrus-CI: pass OVMF env var to test script for upcoming changes 2019-04-11 13:01:26 +00:00
.gitattributes MK_ZFS -> {MK_ZFS|MK_LOADER_ZFS}, this is so we can diable userland / kernel 2019-01-05 22:45:20 +00:00
.gitignore Ignore _.universe-toolchain file. 2018-07-01 13:50:37 +00:00
COPYRIGHT Happy New Year 2019! 2019-01-01 00:25:25 +00:00
LOCKS LOCKS: update current locks 2018-06-09 03:08:04 +00:00
MAINTAINERS Update/reformat maintainer entries that I am a part of 2019-04-29 18:48:43 +00:00
Makefile Modernize the MAKE_JUST_KERNELS hint in the top-level makefile. 2019-05-24 15:45:43 +00:00
Makefile.inc1 Update __FreeBSD_version and Makefile check for r348347 2019-05-29 02:26:15 +00:00
Makefile.libcompat Use ...-freebsd13.0 in -target strings. 2018-11-12 16:55:20 +00:00
Makefile.sys.inc AUTO_OBJ: For all top-level targets enforce using an OBJDIR. 2017-12-05 21:29:47 +00:00
ObsoleteFiles.inc Remove kgzip and kgzldr. 2019-05-24 05:34:21 +00:00
README Import OpenSSL 1.1.1c. 2019-05-28 20:08:17 +00:00
README.md README: add generic notes about GENERIC and NOTES 2018-06-17 19:44:24 +00:00
UPDATING Move back group, master.passwd and shells to etc directory 2019-05-23 18:37:05 +00:00

FreeBSD Source:

This is the top level of the FreeBSD source directory. This file was last revised on: FreeBSD

FreeBSD is an operating system used to power modern servers, desktops, and embedded platforms. A large community has continually developed it for more than thirty years. Its advanced networking, security, and storage features have made FreeBSD the platform of choice for many of the busiest web sites and most pervasive embedded networking and storage devices.

For copyright information, please see the file COPYRIGHT in this directory. Additional copyright information also exists for some sources in this tree - please see the specific source directories for more information.

The Makefile in this directory supports a number of targets for building components (or all) of the FreeBSD source tree. See build(7), config(8), https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html, and https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html for more information, including setting make(1) variables.

Source Roadmap:

bin		System/user commands.

cddl		Various commands and libraries under the Common Development
		and Distribution License.

contrib		Packages contributed by 3rd parties.

crypto		Cryptography stuff (see crypto/README).

etc		Template files for /etc.

gnu		Various commands and libraries under the GNU Public License.
		Please see gnu/COPYING* for more information.

include		System include files.

kerberos5	Kerberos5 (Heimdal) package.

lib		System libraries.

libexec		System daemons.

release		Release building Makefile & associated tools.

rescue		Build system for statically linked /rescue utilities.

sbin		System commands.

secure		Cryptographic libraries and commands.

share		Shared resources.

stand		Boot loader sources.

sys		Kernel sources.

sys/<arch>/conf Kernel configuration files. GENERIC is the configuration
		used in release builds. NOTES contains documentation of
		all possible entries.

tests		Regression tests which can be run by Kyua.  See tests/README
		for additional information.

tools		Utilities for regression testing and miscellaneous tasks.

usr.bin		User commands.

usr.sbin	System administration commands.

For information on synchronizing your source tree with one or more of the FreeBSD Project's development branches, please see:

https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/current-stable.html