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Backports of patch from systemd git to stable distributions
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Zbigniew Jędrzejewski-Szmek 362a55fc14 Bump /tmp size back to 50% of RAM 
This should be enough to fix https://bugzilla.redhat.com/show_bug.cgi?id=1856514.
But the limit should be significantly higher than 10% anyway. By setting a
limit on /tmp at 10% we'll break many reasonable use cases, even though the
machine would deal fine with a much larger fraction devoted to /tmp.
(In the first version of this patch I made it 25% with the comment that
"Even 25% might be too low.". The kernel default is 50%, and we have been using
that seemingly without trouble since https://fedoraproject.org/wiki/Features/tmp-on-tmpfs.
So let's just make it 50% again.)

See 7d85383edb.

(Another consideration is that we learned from from the whole initiative with
zram in Fedora that a reasonable size for zram is 0.5-1.5 of RAM, and that pretty
much all systems benefit from having zram or zswap enabled. Thus it is reasonable
to assume that it'll become widely used. Taking the usual compression effectiveness
of 0.2 into account, machines have effective memory available of between
1.0 - 0.2*0.5 + 0.5 = 1.4 (for zram sized to 0.5 of RAM) and
1.0 - 0.2*1.5 + 1.5 = 2.2 (for zram 1.5 sized to 1.5 of RAM) times RAM size.
This means that the 10% was really like 7-4% of effective memory.)

A comment is added to mount-util.h to clarify that tmp.mount is separate.
2020-07-29 11:07:04 +02:00
.github Revert "ci: turn off the "upstream-systemd-ci" ppa" 2020-07-15 08:59:25 +02:00
.lgtm/cpp-queries lgtm: complain about accept() [people should use accept4() instead, due to O_CLOEXEC] 2019-04-10 20:03:38 +02:00
.mkosi Update mkosi.ubuntu to 'focal' 2020-07-23 16:44:09 +02:00
catalog udevadm: beef up deprecation log warning 2020-07-14 14:57:19 +02:00
coccinelle tree-wide: use set_ensure_put() 2020-06-22 16:32:37 +02:00
docs docs: Document xdg-autostart parameter X-systemd-skip 2020-07-20 16:03:47 +02:00
factory/etc nss-mymachines: drop support for UID/GID resolving 2020-07-14 17:08:12 +02:00
hwdb.d hwdb: update again for v246 2020-07-23 17:25:40 +02:00
man doc: update os-release spec with new path for container host's file 2020-07-23 18:47:38 +02:00
modprobe.d Add SPDX license headers to various assorted files 2017-11-19 19:08:15 +01:00
network network: add TUN/TAP vt-* network rule for VMs 2020-04-17 19:15:00 +02:00
po l10n: update Czech Translation 2020-07-01 17:44:20 +02:00
presets Revert "presets: "disable" all passive targets by default" 2020-05-26 20:51:58 +02:00
rules.d udev: split attribute assignment for MMC cards 2020-06-25 18:40:45 +02:00
semaphoreci semaphoreci: update Debian release to bullseye 2020-07-24 01:45:44 +03:00
shell-completion shell-completion: add missing verbs for networkctl 2020-06-30 08:56:36 +02:00
src Bump /tmp size back to 50% of RAM 2020-07-29 11:07:04 +02:00
sysctl.d sysctl: enable coredump for suid binaries 2020-04-07 15:28:46 +02:00
sysusers.d sysusers,tmpfiles: re-create systemd-network, systemd-resolve and systemd-timesync 2018-07-16 17:11:50 +02:00
test nspawn: rework how /run/host/ is set up 2020-07-23 18:47:38 +02:00
tmpfiles.d tmpfiles: don't complain if we can't enable pstore in containers 2020-05-25 16:43:35 +02:00
tools hwdb/autosuspend: add missing parenthesis 2020-07-16 18:06:35 +02:00
travis-ci travis: compile with -O1 with clang 2020-07-21 02:00:04 +09:00
units Bump /tmp size back to 50% of RAM 2020-07-29 11:07:04 +02:00
xorg scripts: use 4 space indentation 2019-04-12 08:30:31 +02:00
.clang-format clang-format: set Break afer enum to false 2020-07-19 15:44:04 +02:00
.ctags editors: Prevent ctags from following symlinks 2019-02-15 11:01:20 -08:00
.dir-locals.el scripts: use 4 space indentation 2019-04-12 08:30:31 +02:00
.editorconfig editorconfig: add man configuration 2020-05-26 15:37:05 +02:00
.gitattributes git: indicate that tabs are never OK in the systemd tree 2013-10-30 02:25:38 +01:00
.gitignore mkosi: Keep mkosi.default out of the repository. 2020-07-16 21:44:02 +01:00
.lgtm.yml lgtm: drop the TMPDIR/meson workaround 2020-03-03 20:27:42 +01:00
.mailmap NEWS: update contributors list for v246-pre 2020-07-23 17:30:54 +02:00
.travis.yml coverity: switch back to Fedora 31 2020-07-12 22:00:16 +00:00
.vimrc scripts: use 4 space indentation 2019-04-12 08:30:31 +02:00
.ycm_extra_conf.py ycm: add doc string for all the functions in configuration file 2017-11-29 13:21:49 -07:00
azure-pipelines.yml Free up some resources on Azure Pipelines 2019-07-17 13:28:38 +09:00
configure treewide: more portable bash shebangs 2020-03-05 17:27:07 +01:00
LICENSE.GPL2 relicense to LGPLv2.1 (with exceptions) 2012-04-12 00:24:39 +02:00
LICENSE.LGPL2.1 licence: remove references to old FSF address 2012-12-17 11:41:31 +01:00
Makefile build-sys: Fix Makefile wrapper for install target (#6548) 2017-08-07 11:29:20 +02:00
meson_options.txt build-sys: add libfido2 as optional dependency 2020-07-01 11:17:28 +02:00
meson.build meson: do not choke on time epoch when there are no git tags 2020-07-23 12:25:14 +02:00
mkosi.build mkosi: Unify environment for unit tests 2020-04-22 10:35:12 +02:00
NEWS Merge pull request #16566 from poettering/nspawn-osrelease-fixes 2020-07-24 13:37:31 +09:00
README nss-mymachines: drop support for UID/GID resolving 2020-07-14 17:08:12 +02:00
README.md README: add reference to systemd.io 2020-06-16 13:34:04 +02:00
TODO update TODO 2020-07-23 18:47:38 +02:00
zanata.xml po: add basic fedora.zanata.org configuration 2018-02-19 13:56:57 +01:00

README.md

Systemd

System and Service Manager

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Details

Most documentation is available on systemd's web site.

Assorted, older, general information about systemd can be found in the systemd Wiki.

Information about build requirements is provided in the README file.

Consult our NEWS file for information about what's new in the most recent systemd versions.

Please see the Hacking guide for information on how to hack on systemd and test your modifications.

Please see our Contribution Guidelines for more information about filing GitHub Issues and posting GitHub Pull Requests.

When preparing patches for systemd, please follow our Coding Style Guidelines.

If you are looking for support, please contact our mailing list or join our IRC channel.

Stable branches with backported patches are available in the stable repo.