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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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atf | ||
atrun | ||
blacklistd-helper | ||
bootpd | ||
comsat | ||
dma | ||
fingerd | ||
flua | ||
ftpd | ||
getty | ||
hyperv | ||
mail.local | ||
makewhatis.local | ||
mknetid | ||
phttpget | ||
pppoed | ||
rbootd | ||
rc | ||
revnetgroup | ||
rpc.rquotad | ||
rpc.rstatd | ||
rpc.rusersd | ||
rpc.rwalld | ||
rpc.sprayd | ||
rtld-elf | ||
rtld-elf32 | ||
save-entropy | ||
smrsh | ||
talkd | ||
tcpd | ||
tests | ||
tftp-proxy | ||
tftpd | ||
ulog-helper | ||
ypxfr | ||
Makefile | ||
Makefile.amd64 | ||
Makefile.i386 | ||
Makefile.inc |