lwn.git/Documentation/admin-guide, branch docs-mw

docs: sysctl/net: Remove ax25, netrom, rose entries

2026-05-25T20:31:44+00:00

These networking subsystems were removed in commit dd8d4bc28ad7 ("net: remove ax25 and amateur radio (hamradio) subsystem"), but the sysctl directory table still listed them. Assisted-by: Claude:claude-opus-4-6 Signed-off-by: Costa Shulyupin Acked-by: Randy Dunlap Signed-off-by: Jonathan Corbet Message-ID: <20260515180200.1490926-1-costa.shul@redhat.com>

docs: admin-guide: add IGNORE_DIRS example for cscope

2026-05-15T14:48:28+00:00

The workload tracing guide shows how to build a cscope database by running cscope command directly. The kernel build system also provides a cscope target, which supports IGNORE_DIRS for excluding directories from the generated database. Mention make cscope and show how to exclude Documentation/ as an example. Signed-off-by: Cheng-Han Wu Reviewed-by: Shuah Khan Signed-off-by: Jonathan Corbet Message-ID: <20260503101429.254394-5-hank20010209@gmail.com>

docs: admin-guide: clarify perf bench all behavior

2026-05-15T14:48:28+00:00

The workload tracing guide lists a fixed set of benchmarks for "perf bench all". This list is stale and can become outdated when perf adds, removes, or renames benchmark collections or individual benchmarks. Describe "perf bench all" as running all available benchmarks in the perf bench framework instead. Also document how to list the collections and benchmarks available on a given system. Signed-off-by: Cheng-Han Wu Reviewed-by: Shuah Khan Signed-off-by: Jonathan Corbet Message-ID: <20260503101429.254394-4-hank20010209@gmail.com>

docs: admin-guide: fix stress-ng command examples

2026-05-15T14:48:28+00:00

The workload tracing guide includes stress-ng command examples with a stray "command." word at the end. This makes the examples invalid if they are copied and run directly. Remove the stray word from the stress-ng example. Also use "--" in the perf record example to clearly separate perf record options from the workload command being recorded. Signed-off-by: Cheng-Han Wu Reviewed-by: Shuah Khan Signed-off-by: Jonathan Corbet Message-ID: <20260503101429.254394-3-hank20010209@gmail.com>

docs: admin-guide: fix typos in workload tracing guide

2026-05-15T14:48:28+00:00

Fix several typos in the workload tracing guide: - sys_opennat() -> sys_openat() - annotate the to view -> annotate the output to view - sys_getegid -> sys_getegid() Signed-off-by: Cheng-Han Wu Reviewed-by: Shuah Khan Signed-off-by: Jonathan Corbet Message-ID: <20260503101429.254394-2-hank20010209@gmail.com>

docs: Update nosmt support for arm64

2026-05-15T14:26:31+00:00

commit eed4583bcf9a6 ("arm64: Kconfig: Enable HOTPLUG_SMT") enable HOTPLUG_SMT for SMT control for arm64, but the documentation was not updated accordingly to reflect that ARM64 now supports control SMT via boot parameter and sysfs knobs: 1. Boot parameters: nosmt: Disable SMT, can be enabled via sysfs knobs. nosmt=force: Disable SMT, cannot be enabled via sysfs knobs. 2. Runtime sysfs controls: Write "on", "off", "forceoff" or the number of SMT threads (1, 2, ...) to /sys/devices/system/cpu/smt/control. Signed-off-by: Jinjie Ruan Signed-off-by: Jonathan Corbet Message-ID: <20260417032540.3720627-1-ruanjinjie@huawei.com>

docs: reporting-issues: replace "these advices" with "all of this advice"

2026-05-15T13:55:51+00:00

"Advice" is an uncountable noun, so "these advices" is grammatically incorrect. Replace it with "all of this advice" instead, which keeps the sentence grammatical while also making it clear that it refers to the full set of recommendations in the paragraph. Signed-off-by: Chen-Shi-Hong Reviewed-by: WangYuli Signed-off-by: Jonathan Corbet Message-ID: <20260514082808.655-1-eric039eric@gmail.com>

Documentation/kernel-parameters: Remove "Deprecated" from isolcpus=

2026-05-03T15:09:15+00:00

The isolcpus= option has been marked as deprecated in 2017. Back then it was desired for the domain sub option to be configured dynamically at runtime instead using this boot command line which provides a static configuration. In the meantime this option was extended by other sub options which don't have runtime counterpart or it does not make sense to provide one. The deprecated part always referred to the default `domain' sub option but it was not obvious. Also the reasoning behind the deprecation is sort of dubious: There is nothing wrong with a static configuration if there is no desired to reconfigure. This is useful on systems which have one purpose and the CPU partition configuration is not changed for the entire lifetime. Remove the "Deprecated" note. Remove the part of the description which suggest to use cpuset.sched_load_balance and instead point to the documentation file which explains how to use cpusets to configure this at runtime. Signed-off-by: Sebastian Andrzej Siewior Acked-by: Waiman Long Acked-by: Steven Rostedt Signed-off-by: Jonathan Corbet Message-ID: <20260427150739.bwVmmkj2@linutronix.de>

docs: Remove stale ISDN parameters

2026-05-03T14:36:03+00:00

The icn= and pcbit= parameters referenced drivers removed in commit 02bbd9802da7 ("staging: i4l: delete the whole thing"). Remove the stale parameter entries and the now-unused ISDN tag from the legend. Suggested-by: Randy Dunlap Signed-off-by: Costa Shulyupin Assisted-by: Claude:claude-opus-4-6 Acked-by: Randy Dunlap Signed-off-by: Jonathan Corbet Message-ID: <20260502120206.1289126-1-costa.shul@redhat.com>

Documentation/binfmt-misc.rst: Specify aux vector for "O" flag description

2026-04-27T09:58:19+00:00

Instead of replacing the file path in the argument vector, the file descriptor is passed as AT_EXECFD in the auxilary vector. This appears to have been the case at least since the git port, update the documentation to reflect this. Signed-off-by: Charlie Jenkins Signed-off-by: Jonathan Corbet Message-ID: <20260418-binfmt_misc_doc_update-v1-1-c2e9601ab868@gmail.com>