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Backports of patch from systemd git to stable distributions
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Chen Guanqiao 39f4a5abbe mount: optimize mountinfo traversal by decoupling device discovery 
In mount_load_proc_self_mountinfo(), device_found_node() is synchronously called
during the traversal of mountinfo entries. When there are a large number of
mount points, and the device types are not significantly different, this results
in excessive time consumption during device discovery, causing a performance
bottleneck. This issue is particularly prominent on servers with a large number
of cores in IDC.

This patch decouples device discovery from the mountinfo traversal process,
avoiding redundant device operations. As a result, it significantly improves
performance, especially in environments with numerous mount points.

Signed-off-by: Chen Guanqiao <chen.chenchacha@foxmail.com>
(cherry picked from commit 00ad3f02275b507a753495ace5e5f84cb38b604d)
(cherry picked from commit 44e1774660fcddcfefcf153cc3c189ea35572d63)
(cherry picked from commit ea35f88ae7)
(cherry picked from commit 7ed4036831)
2024-11-16 10:30:57 +00:00
.clusterfuzzlite ci: unpin CFLite 2022-04-26 09:13:57 +00:00
.github mkosi: work around jammy's debootstrap issue 2024-09-11 15:10:37 +02:00
.semaphore semaphore: do not build docs 2024-10-10 10:33:40 +01:00
catalog portable: log structured message when attach/detach succeeds 2024-02-28 10:29:35 +00:00
coccinelle coccinelle: skip the empty-to-null transformation on the macro itself 2023-01-25 11:35:06 +01:00
docs docs: Mention the new mount API in the container interface doc 2024-08-19 20:22:44 +02:00
factory man: don't suggest using pam_unix.so's use_authtok switch 2024-01-26 19:53:42 +00:00
hwdb.d hwdb: update to main@{2024-09-10} 2024-09-11 15:10:37 +02:00
LICENSES LICENSES/README: expand text to summarize state for binaries and libs 2024-07-07 00:15:21 +02:00
man man: machinectl(1): Fix description of subcommand poweroff 2024-11-16 10:30:57 +00:00
mkosi.conf.d mkosi: policykit-1 was renamed to polkitd 2024-07-25 09:16:58 +01:00
modprobe.d modprobe: set 'ifb numifbs=0' to avoid autocreating ifb0 2024-01-26 19:53:42 +00:00
network network: request non-NULL SSID when a wlan interface is configured as station 2024-08-19 20:22:44 +02:00
po po: Translated using Weblate (Portuguese) 2022-12-12 13:26:55 +09:00
presets journal: give the ability to enable/disable systemd-journald-audit.socket 2023-01-11 17:18:57 +01:00
rules.d add udev rules for trezor hw wallet devices 2024-07-25 09:16:58 +01:00
shell-completion shell completion: fix machinectl import-{tar,raw} 2024-05-09 17:44:12 +02:00
src mount: optimize mountinfo traversal by decoupling device discovery 2024-11-16 10:30:57 +00:00
sysctl.d sysctl.d: Fix pid_max comment 2023-11-09 21:05:51 +00:00
sysusers.d sysusers: also add root group 2023-02-15 10:29:10 +09:00
test test: mask rc.local generator, broken on Jammy 2024-10-10 10:33:40 +01:00
tmpfiles.d Revert "tmpfiles.d/systemd: use ACL 'X' bit where appropriate" 2024-05-26 11:54:40 +01:00
tools tools: syscall tables moved to a subdirectory 2023-11-09 21:05:51 +00:00
units man,units: drop "temporary" from description of systemd-tmpfiles 2024-06-25 20:31:13 +02:00
xorg xorg/50-systemd-user: add a full license header 2021-10-01 14:45:00 +02:00
.clang-format clang-format: Adjust style of pointers 2022-05-30 04:00:54 +09:00
.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 docs: configure editorconfig for css and html 2022-05-17 21:13:17 +02:00
.gitattributes gitattributes: introduce and use "generated" attribute 2021-10-18 09:42:55 +02:00
.gitignore git: Ignore mkosi secure boot keys 2023-02-01 16:52:28 +01:00
.mailmap mailmap: two more names 2021-03-30 13:17:58 +02:00
.packit.yml packit: use the closest matching tag for the checked out revision 2024-01-26 19:53:42 +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
configure configure: update meson invocation 2023-08-09 23:04:43 +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 tree-wide: add spdx header on all scripts and helpers 2021-01-28 09:55:35 +01:00
meson_options.txt meson: fix description for link-udev-shared option 2023-06-01 16:37:09 +02:00
meson.build meson: enable -Wunterminated-string-initialization 2024-08-19 20:22:44 +02:00
mkosi.build mkosi: configure multiarch libdir in debian/ubuntu builds 2023-03-03 09:43:10 +01:00
mkosi.kernel.config mkosi: Enable CONFIG_ZBOOT 2022-12-13 21:27:15 +01:00
mkosi.postinst mkosi: mask unit from newer versions that gets installed by package 2023-11-09 23:28:34 +00:00
mkosi.prepare mkosi: Use globs instead of prepare script to install extra packages 2023-02-10 16:05:32 +01:00
NEWS tree-wide: use https for the 0pointer.de doc links 2023-07-07 19:30:52 +01:00
README README: update requirements for signed dm-verity 2024-07-07 00:15:21 +02:00
README.md README.md: add a missing line break 2022-10-19 11:17:33 +02:00
TODO doc: replace wrong á preposition by à 2023-03-28 18:57:25 +02:00

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 Code Map for information about this repository's layout and content.

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.