4a30d7bb37
Add the ability to create a swap partition in the course of growing the root file system on first boot, enabling by default. The default rules are: add swap if the disk is at least 15 GB (decimal), and the existing root is less than 40% of the disk. The default size is 10% of the disk, but is limited by the memory size. The limit is twice memory size up to 4 GB, 8 GB up to 8 GB memory, and memory size over 8 GB memory. Swap size is clamped at vm.swap_maxpages/2 as well. The new swap partition is labeled as "growfs_swap". The default behavior can be overridden by setting growfs_swap_size in /etc/rc.conf or in the kernel environment, with kenv taking priority. A value of 0 inhibits the addition of swap, an empty value specifies the default, and other values indicate a swap size in bytes. By default, addition of swap is inhibited if a swap partition is found in the output of the sysctl kern.geom.conftxt before the current root partition, usually meaning that there is another disk present. Swap space is not added if one is already present in /etc/fstab. The root partition is read-only when growfs runs, so /etc/fstab can not be modified. That step is handled by a new growfs_fstab script, added in a separate commit. Set the value "growfs_swap_pdev" in kenv to indicate that this should be done, as well as for internal use. There is optional verbose output meant for debugging; it can only be enabled by modifying the script (in two places, for sh and awk). This should be removed before release, after testing on -current. Discussed with: cperciva Reviewed by: imp (previous version) Differential Revision: https://reviews.freebsd.org/D37462 |
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|---|---|---|
| .cirrus-ci | ||
| .github | ||
| bin | ||
| cddl | ||
| contrib | ||
| crypto | ||
| etc | ||
| gnu | ||
| include | ||
| kerberos5 | ||
| lib | ||
| libexec | ||
| release | ||
| rescue | ||
| sbin | ||
| secure | ||
| share | ||
| stand | ||
| sys | ||
| targets | ||
| tests | ||
| tools | ||
| usr.bin | ||
| usr.sbin | ||
| .arcconfig | ||
| .arclint | ||
| .cirrus.yml | ||
| .clang-format | ||
| .gitattributes | ||
| .gitignore | ||
| COPYRIGHT | ||
| LOCKS | ||
| MAINTAINERS | ||
| Makefile | ||
| Makefile.inc1 | ||
| Makefile.libcompat | ||
| Makefile.sys.inc | ||
| ObsoleteFiles.inc | ||
| README.md | ||
| RELNOTES | ||
| UPDATING | ||
FreeBSD Source:
This is the top level of the FreeBSD source directory.
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), FreeBSD handbook on building userland, and Handbook for kernels for more information, including setting make(1) variables.
For information on the CPU architectures and platforms supported by FreeBSD, see the FreeBSD website's Platforms page.
Source Roadmap:
| Directory | Description |
|---|---|
| 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 | Commands and libraries under the GNU General Public License (GPL) or Lesser General Public License (LGPL). Please see gnu/COPYING and gnu/COPYING.LIB 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 (see sys/README.md). |
| targets | Support for experimental DIRDEPS_BUILD |
| 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 FreeBSD Handbook.