diff options
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 126 | ||||
| -rw-r--r-- | init/do_mounts.c | 1 | ||||
| -rw-r--r-- | init/init_task.c | 5 | ||||
| -rw-r--r-- | init/initramfs.c | 4 | ||||
| -rw-r--r-- | init/main.c | 25 | ||||
| -rw-r--r-- | init/noinitramfs.c | 14 | ||||
| -rw-r--r-- | init/version.c | 1 |
7 files changed, 136 insertions, 40 deletions
diff --git a/init/Kconfig b/init/Kconfig index 8b9ffe236e4f..bd7d650d4a99 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -1,3 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only config DEFCONFIG_LIST string depends on !UML @@ -23,6 +24,9 @@ config CLANG_VERSION int default $(shell,$(srctree)/scripts/clang-version.sh $(CC)) +config CC_CAN_LINK + def_bool $(success,$(srctree)/scripts/cc-can-link.sh $(CC)) + config CC_HAS_ASM_GOTO def_bool $(success,$(srctree)/scripts/gcc-goto.sh $(CC)) @@ -95,6 +99,36 @@ config COMPILE_TEST here. If you are a user/distributor, say N here to exclude useless drivers to be distributed. +config HEADER_TEST + bool "Compile test headers that should be standalone compilable" + help + Compile test headers listed in header-test-y target to ensure they are + self-contained, i.e. compilable as standalone units. + + If you are a developer or tester and want to ensure the requested + headers are self-contained, say Y here. Otherwise, choose N. + +config KERNEL_HEADER_TEST + bool "Compile test kernel headers" + depends on HEADER_TEST + help + Headers in include/ are used to build external moduls. + Compile test them to ensure they are self-contained, i.e. + compilable as standalone units. + + If you are a developer or tester and want to ensure the headers + in include/ are self-contained, say Y here. Otherwise, choose N. + +config UAPI_HEADER_TEST + bool "Compile test UAPI headers" + depends on HEADER_TEST && HEADERS_INSTALL && CC_CAN_LINK + help + Compile test headers exported to user-space to ensure they are + self-contained, i.e. compilable as standalone units. + + If you are a developer or tester and want to ensure the exported + headers are self-contained, say Y here. Otherwise, choose N. + config LOCALVERSION string "Local version - append to kernel release" help @@ -516,7 +550,7 @@ config PSI have cpu.pressure, memory.pressure, and io.pressure files, which aggregate pressure stalls for the grouped tasks only. - For more details see Documentation/accounting/psi.txt. + For more details see Documentation/accounting/psi.rst. Say N if unsure. @@ -579,15 +613,14 @@ config IKCONFIG_PROC This option enables access to the kernel configuration file through /proc/config.gz. -config IKHEADERS_PROC - tristate "Enable kernel header artifacts through /proc/kheaders.tar.xz" - depends on PROC_FS +config IKHEADERS + tristate "Enable kernel headers through /sys/kernel/kheaders.tar.xz" + depends on SYSFS help - This option enables access to the kernel header and other artifacts that - are generated during the build process. These can be used to build eBPF - tracing programs, or similar programs. If you build the headers as a - module, a module called kheaders.ko is built which can be loaded on-demand - to get access to the headers. + This option enables access to the in-kernel headers that are generated during + the build process. These can be used to build eBPF tracing programs, + or similar programs. If you build the headers as a module, a module called + kheaders.ko is built which can be loaded on-demand to get access to headers. config LOG_BUF_SHIFT int "Kernel log buffer size (16 => 64KB, 17 => 128KB)" @@ -677,6 +710,59 @@ config HAVE_UNSTABLE_SCHED_CLOCK config GENERIC_SCHED_CLOCK bool +menu "Scheduler features" + +config UCLAMP_TASK + bool "Enable utilization clamping for RT/FAIR tasks" + depends on CPU_FREQ_GOV_SCHEDUTIL + help + This feature enables the scheduler to track the clamped utilization + of each CPU based on RUNNABLE tasks scheduled on that CPU. + + With this option, the user can specify the min and max CPU + utilization allowed for RUNNABLE tasks. The max utilization defines + the maximum frequency a task should use while the min utilization + defines the minimum frequency it should use. + + Both min and max utilization clamp values are hints to the scheduler, + aiming at improving its frequency selection policy, but they do not + enforce or grant any specific bandwidth for tasks. + + If in doubt, say N. + +config UCLAMP_BUCKETS_COUNT + int "Number of supported utilization clamp buckets" + range 5 20 + default 5 + depends on UCLAMP_TASK + help + Defines the number of clamp buckets to use. The range of each bucket + will be SCHED_CAPACITY_SCALE/UCLAMP_BUCKETS_COUNT. The higher the + number of clamp buckets the finer their granularity and the higher + the precision of clamping aggregation and tracking at run-time. + + For example, with the minimum configuration value we will have 5 + clamp buckets tracking 20% utilization each. A 25% boosted tasks will + be refcounted in the [20..39]% bucket and will set the bucket clamp + effective value to 25%. + If a second 30% boosted task should be co-scheduled on the same CPU, + that task will be refcounted in the same bucket of the first task and + it will boost the bucket clamp effective value to 30%. + The clamp effective value of a bucket is reset to its nominal value + (20% in the example above) when there are no more tasks refcounted in + that bucket. + + An additional boost/capping margin can be added to some tasks. In the + example above the 25% task will be boosted to 30% until it exits the + CPU. If that should be considered not acceptable on certain systems, + it's always possible to reduce the margin by increasing the number of + clamp buckets to trade off used memory for run-time tracking + precision. + + If in doubt, use the default value. + +endmenu + # # For architectures that want to enable the support for NUMA-affine scheduler # balancing logic: @@ -734,8 +820,8 @@ menuconfig CGROUPS use with process control subsystems such as Cpusets, CFS, memory controls or device isolation. See - - Documentation/scheduler/sched-design-CFS.txt (CFS) - - Documentation/cgroup-v1/ (features for grouping, isolation + - Documentation/scheduler/sched-design-CFS.rst (CFS) + - Documentation/admin-guide/cgroup-v1/ (features for grouping, isolation and resource control) Say N if unsure. @@ -797,15 +883,7 @@ config BLK_CGROUP CONFIG_CFQ_GROUP_IOSCHED=y; for enabling throttling policy, set CONFIG_BLK_DEV_THROTTLING=y. - See Documentation/cgroup-v1/blkio-controller.txt for more information. - -config DEBUG_BLK_CGROUP - bool "IO controller debugging" - depends on BLK_CGROUP - default n - ---help--- - Enable some debugging help. Currently it exports additional stat - files in a cgroup which can be useful for debugging. + See Documentation/admin-guide/cgroup-v1/blkio-controller.rst for more information. config CGROUP_WRITEBACK bool @@ -835,7 +913,7 @@ config CFS_BANDWIDTH tasks running within the fair group scheduler. Groups with no limit set are considered to be unconstrained and will run with no restriction. - See Documentation/scheduler/sched-bwc.txt for more information. + See Documentation/scheduler/sched-bwc.rst for more information. config RT_GROUP_SCHED bool "Group scheduling for SCHED_RR/FIFO" @@ -846,7 +924,7 @@ config RT_GROUP_SCHED to task groups. If enabled, it will also make it impossible to schedule realtime tasks for non-root users until you allocate realtime bandwidth for them. - See Documentation/scheduler/sched-rt-group.txt for more information. + See Documentation/scheduler/sched-rt-group.rst for more information. endif #CGROUP_SCHED @@ -1749,7 +1827,7 @@ config SLAB_FREELIST_HARDENED help Many kernel heap attacks try to target slab cache metadata and other infrastructure. This options makes minor performance - sacrifies to harden the kernel slab allocator against common + sacrifices to harden the kernel slab allocator against common freelist exploit methods. config SHUFFLE_PAGE_ALLOCATOR @@ -1781,7 +1859,7 @@ config SLUB_CPU_PARTIAL depends on SLUB && SMP bool "SLUB per cpu partial cache" help - Per cpu partial caches accellerate objects allocation and freeing + Per cpu partial caches accelerate objects allocation and freeing that is local to a processor at the price of more indeterminism in the latency of the free. On overflow these caches will be cleared which requires the taking of locks that may cause latency spikes. diff --git a/init/do_mounts.c b/init/do_mounts.c index 864c032e995d..53cb37b66227 100644 --- a/init/do_mounts.c +++ b/init/do_mounts.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only #include <linux/module.h> #include <linux/sched.h> #include <linux/ctype.h> diff --git a/init/init_task.c b/init/init_task.c index c70ef656d0f4..7ab773b9b3cd 100644 --- a/init/init_task.c +++ b/init/init_task.c @@ -72,7 +72,8 @@ struct task_struct init_task .static_prio = MAX_PRIO - 20, .normal_prio = MAX_PRIO - 20, .policy = SCHED_NORMAL, - .cpus_allowed = CPU_MASK_ALL, + .cpus_ptr = &init_task.cpus_mask, + .cpus_mask = CPU_MASK_ALL, .nr_cpus_allowed= NR_CPUS, .mm = NULL, .active_mm = &init_mm, @@ -166,6 +167,8 @@ struct task_struct init_task .softirqs_enabled = 1, #endif #ifdef CONFIG_LOCKDEP + .lockdep_depth = 0, /* no locks held yet */ + .curr_chain_key = INITIAL_CHAIN_KEY, .lockdep_recursion = 0, #endif #ifdef CONFIG_FUNCTION_GRAPH_TRACER diff --git a/init/initramfs.c b/init/initramfs.c index 178130fd61c2..c47dad0884f7 100644 --- a/init/initramfs.c +++ b/init/initramfs.c @@ -617,7 +617,7 @@ static inline void clean_rootfs(void) #endif /* CONFIG_BLK_DEV_RAM */ #ifdef CONFIG_BLK_DEV_RAM -static void populate_initrd_image(char *err) +static void __init populate_initrd_image(char *err) { ssize_t written; int fd; @@ -637,7 +637,7 @@ static void populate_initrd_image(char *err) ksys_close(fd); } #else -static void populate_initrd_image(char *err) +static void __init populate_initrd_image(char *err) { printk(KERN_EMERG "Initramfs unpacking failed: %s\n", err); } diff --git a/init/main.c b/init/main.c index 4dbc7243557e..96f8d5af52d6 100644 --- a/init/main.c +++ b/init/main.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * linux/init/main.c * @@ -519,6 +520,29 @@ static inline void initcall_debug_enable(void) } #endif +/* Report memory auto-initialization states for this boot. */ +static void __init report_meminit(void) +{ + const char *stack; + + if (IS_ENABLED(CONFIG_INIT_STACK_ALL)) + stack = "all"; + else if (IS_ENABLED(CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL)) + stack = "byref_all"; + else if (IS_ENABLED(CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF)) + stack = "byref"; + else if (IS_ENABLED(CONFIG_GCC_PLUGIN_STRUCTLEAK_USER)) + stack = "__user"; + else + stack = "off"; + + pr_info("mem auto-init: stack:%s, heap alloc:%s, heap free:%s\n", + stack, want_init_on_alloc(GFP_KERNEL) ? "on" : "off", + want_init_on_free() ? "on" : "off"); + if (want_init_on_free()) + pr_info("mem auto-init: clearing system memory may take some time...\n"); +} + /* * Set up kernel memory allocators */ @@ -529,6 +553,7 @@ static void __init mm_init(void) * bigger than MAX_ORDER unless SPARSEMEM. */ page_ext_init_flatmem(); + report_meminit(); mem_init(); kmem_cache_init(); pgtable_init(); diff --git a/init/noinitramfs.c b/init/noinitramfs.c index f4bad8436c93..fa9cdfa7101d 100644 --- a/init/noinitramfs.c +++ b/init/noinitramfs.c @@ -1,21 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * init/noinitramfs.c * * Copyright (C) 2006, NXP Semiconductors, All Rights Reserved * Author: Jean-Paul Saman <jean-paul.saman@nxp.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/init.h> #include <linux/stat.h> diff --git a/init/version.c b/init/version.c index ef4012ec4375..cba341161b58 100644 --- a/init/version.c +++ b/init/version.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * linux/init/version.c * |