Lines Matching +full:max +full:- +full:memory +full:- +full:bandwidth
1 # SPDX-License-Identifier: GPL-2.0-only
8 - Re-run Kconfig when the compiler is updated
13 - Ensure full rebuild when the compiler is updated
14 include/linux/compiler-version.h contains this option in the comment
16 auto-generated dependency. When the compiler is updated, syncconfig
20 def_bool $(success,test "$(cc-name)" = GCC)
24 default $(cc-version) if CC_IS_GCC
28 def_bool $(success,test "$(cc-name)" = Clang)
32 default $(cc-version) if CC_IS_CLANG
36 def_bool $(success,test "$(as-name)" = GNU)
39 def_bool $(success,test "$(as-name)" = LLVM)
45 default $(as-version)
48 def_bool $(success,test "$(ld-name)" = BFD)
52 default $(ld-version) if LD_IS_BFD
56 def_bool $(success,test "$(ld-name)" = LLD)
60 default $(ld-version) if LD_IS_LLD
65 default $(rustc-version)
75 Please see Documentation/rust/quick-start.rst for instructions on how
83 default $(rustc-llvm-version)
87 …default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) $(CLANG_FLAGS) $(USERCFLAGS) $(USERLDFLA…
88 …default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) $(CLANG_FLAGS) $(USERCFLAGS) $(USERLDFLA…
103 …nt x) { asm goto ("": "=r"(x) ::: bar); return x; bar: return 0; }' | $(CC) -x c - -c -o /dev/null)
105 …te__((cleanup(b)))=c();{asm goto(""::::l1);return 2;l1:return 3;}}' | $(CC) -x c - -c -o /dev/null)
109 # Detect buggy gcc and clang, fixed in gcc-11 clang-14.
110 …foo(int *x) { asm goto (".long (%l[bar]) - .": "+m"(*x) ::: bar); return *x; bar: return 0; }' | $…
113 …env "CC=$(CC)" "LD=$(LD)" "NM=$(NM)" "OBJCOPY=$(OBJCOPY)" $(srctree)/scripts/tools-support-relr.sh)
116 def_bool $(success,echo 'void foo(void) { asm inline (""); }' | $(CC) -x c - -c -o /dev/null)
122 # https://github.com/llvm/llvm-project/commit/c44fa3e8a9a44c2e9a575768a3c185354b9f6c17
129 … '__attribute__((no_profile_instrument_function)) int x();' | $(CC) -x c - -c -o /dev/null -Werror)
136 # https://github.com/llvm/llvm-project/commit/160fb1121cdf703c3ef5e61fb26c5659eb581489
143 …[][4] __attribute__((__nonstring__)) = { };' | $(CC) $(CLANG_FLAGS) -x c - -c -o /dev/null -Werror)
147 # https://github.com/llvm/llvm-project/pull/130661
167 default $(shell,$(srctree)/scripts/pahole-version.sh $(PAHOLE))
218 drivers to compile-test them.
229 enables the '-Werror' (for C) and '-Dwarnings' (for Rust) flags
245 Compile test headers exported to user-space to ensure they are
246 self-contained, i.e. compilable as standalone units.
249 headers are self-contained, say Y here. Otherwise, choose N.
252 string "Local version - append to kernel release"
270 A string of the format -gxxxxxxxx will be added to the localversion
271 if a git-based tree is found. The string generated by this will be
278 $ git rev-parse --verify HEAD
320 The linux kernel is a kind of self-extracting executable.
351 Bzip2 uses a large amount of memory. For modern kernels you
370 filter (i386, x86_64, ARM, ARM64, RISC-V, big endian PowerPC,
390 LZ4 is an LZ77-type compressor with a fixed, byte-oriented encoding.
447 DOSEMU-HOWTO, available from <http://www.tldp.org/docs.html#howto>),
496 See Documentation/core-api/watch_queue.rst
560 this also enables accounting of stolen time on logically-partitioned
573 kernel-user boundaries using the context tracking subsystem.
628 command name, memory usage, controlling terminal etc. (the complete
660 bool "Enable per-task delay accounting"
681 bool "Enable per-task storage I/O accounting"
693 Collect metrics that indicate how overcommitted the CPU, memory,
697 pressure statistics files cpu, memory, and io. These will indicate
702 have cpu.pressure, memory.pressure, and io.pressure files,
720 common scheduling-intense workloads in practice (such as
751 on-disk kernel. This information can be extracted from the kernel
752 image file with the script scripts/extract-ikconfig and used as
768 This option enables access to the in-kernel headers that are generated during
771 kheaders.ko is built which can be loaded on-demand to get access to headers.
860 With this option, the user can specify the min and max CPU
861 utilization allowed for RUNNABLE tasks. The max utilization defines
865 Both min and max utilization clamp values are hints to the scheduler,
867 enforce or grant any specific bandwidth for tasks.
880 the precision of clamping aggregation and tracking at run-time.
886 If a second 30% boosted task should be co-scheduled on the same CPU,
897 clamp buckets to trade off used memory for run-time tracking
908 # Not particularly useful until we get to multi-rq proxying
911 This option enables proxy execution, a mechanism for mutex-owning
917 # For architectures that want to enable the support for NUMA-affine scheduler
934 def_bool !$(cc-option,$(m64-flag) -D__SIZEOF_INT128__=0) && 64BIT
938 default "-Wimplicit-fallthrough=5" if CC_IS_GCC && $(cc-option,-Wimplicit-fallthrough=5)
939 default "-Wimplicit-fallthrough" if CC_IS_CLANG && $(cc-option,-Wunreachable-code-fallthrough)
941 # Currently, disable gcc-10+ array-bounds globally.
942 # It's still broken in gcc-13, so no upper bound yet.
950 # Currently, disable -Wstringop-overflow for GCC globally.
968 # For architectures that (ab)use NUMA to represent different memory regions
969 # all cpu-local but of different latencies, such as SuperH.
975 bool "Memory placement aware NUMA scheduler"
980 This option adds support for automatic NUMA aware memory/task placement.
981 The mechanism is quite primitive and is based on migrating memory when
987 bool "Automatically enable NUMA aware memory/task placement"
1002 use with process control subsystems such as Cpusets, CFS, memory
1005 - Documentation/scheduler/sched-design-CFS.rst (CFS)
1006 - Documentation/admin-guide/cgroup-v1/ (features for grouping, isolation
1027 bool "Memory controller"
1033 Provides control over the memory footprint of tasks in a cgroup.
1050 bool "Legacy cgroup v1 memory controller"
1054 Legacy cgroup v1 memory controller which has been deprecated by
1060 Please note that feature set of the legacy memory controller is likely
1076 control disk bandwidth allocation (proportional time slice allocation)
1082 enabling proportional weight division of disk bandwidth in CFQ, set
1086 See Documentation/admin-guide/cgroup-v1/blkio-controller.rst for more information.
1098 bandwidth allocation to such task groups. It uses cgroups to group
1115 bool "CPU bandwidth provisioning for FAIR_GROUP_SCHED"
1120 This option allows users to define CPU bandwidth rates (limits) for
1124 See Documentation/scheduler/sched-bwc.rst for more information.
1131 This feature lets you explicitly allocate real CPU bandwidth
1133 schedule realtime tasks for non-root users until you allocate
1134 realtime bandwidth for them.
1135 See Documentation/scheduler/sched-rt-group.rst for more information.
1170 When this option is enabled, the user can specify a min and max
1171 CPU bandwidth which is allowed for each single task in a group.
1172 The max bandwidth allows to clamp the maximum frequency a task
1173 can use, while the min bandwidth allows to define a minimum
1177 specified task-specific clamp value is constrained by the cgroup
1210 bool "Device memory controller (DMEM)"
1214 memory usage based on the cgroup hierarchy.
1225 This option affects the ORIGINAL cgroup interface. The cgroup2 memory
1226 controller includes important in-kernel memory consumers per default.
1253 Memory Nodes and assigning tasks to run only within those sets.
1293 This option extends the perf per-cpu mode to restrict monitoring
1325 /Documentation/admin-guide/cgroup-v2.rst.
1389 user-space use the memory control groups to limit the amount
1390 of memory a memory unprivileged users can use.
1439 bool "Kernel->user space relay support (formerly relayfs)"
1457 etc. See <file:Documentation/admin-guide/initrd.rst> for details.
1479 See <file:Documentation/admin-guide/bootconfig.rst> for details.
1489 out even when the "bootconfig" kernel-boot parameter is omitted.
1491 make the kernel ignore the BOOT_CONFIG-supplied kernel-boot
1531 Build KUnit tests for initramfs. See Documentation/dev-tools/kunit
1538 bool "Optimize for performance (-O2)"
1541 with the "-O2" compiler flag for best performance and most
1542 helpful compile-time warnings.
1545 bool "Optimize for size (-Os)"
1547 Choosing this option will pass "-Os" to your compiler resulting
1566 depends on $(cc-option,-ffunction-sections -fdata-sections)
1567 depends on $(ld-option,--gc-sections)
1570 the linker by compiling with -ffunction-sections -fdata-sections,
1571 and linking with --gc-sections.
1573 This can reduce on disk and in-memory size of the kernel
1583 depends on $(ld-option,--orphan-handling=warn)
1584 depends on $(ld-option,--orphan-handling=error)
1601 Enable support for /proc/sys/debug/exception-trace.
1606 Enable support for /proc/sys/kernel/ignore-unaligned-usertrap
1613 Enable support for /proc/sys/kernel/unaligned-trap
1633 # Unhide debug options, to make the on-by-default options visible
1638 environments which can tolerate a "non-standard" kernel.
1642 bool "Enable 16-bit UID system calls" if EXPERT
1646 This enables the legacy 16-bit UID syscall wrappers.
1652 This option enables support for non-root users, groups and
1744 bool "Enable PC-Speaker support" if EXPERT
1749 This option allows to disable the internal PC-Speaker
1750 support, saving some memory.
1753 bool "Enable smaller-sized data structures for core" if EXPERT
1756 kernel data structures. This saves memory on small machines,
1767 run glibc-based applications correctly.
1823 The shmem is an internal filesystem used to manage shared memory.
1875 applications to advise the kernel about their future memory or file
1884 Enable the membarrier() system call that allows issuing memory
1886 the cost of user-space memory barriers asymmetrically by transforming
1887 pairs of memory barriers into pairs consisting of membarrier() and a
1896 user-space with the ability to compare two processes to see if they
1898 memory space.
1909 user-space cache for the current CPU number value, which
1910 speeds up getting the current CPU number from user-space,
1911 as well as an ABI to speed up user-space operations on
1912 per-CPU data.
1952 Start self-test automatically after system startup. Suggest executing
1987 A 64-bit kernel is required for the memory sealing feature.
2001 For complete descriptions of memory sealing, please see
2002 Documentation/userspace-api/mseal.rst
2029 Software events are supported either built-in or via the
2035 suffered, or branches mis-predicted - without slowing down the
2037 when a threshold number of events have passed - and can thus be
2054 Use vmalloc memory to back perf mmap() buffers.
2104 This allows other Rust-related options, like drivers written in Rust,
2124 # The dummy parameter `workaround-for-0.69.0` is required to support 0.69.0
2125 # (https://github.com/rust-lang/rust-bindgen/pull/2678) and 0.71.0
2126 # (https://github.com/rust-lang/rust-bindgen/pull/3040). It can be removed
2129 default "$(shell,$(BINDGEN) --version workaround-for-0.69.0 2>/dev/null)"
2196 # macros for not-implemented syscalls in kernel/sys_ni.c and
2197 # kernel/time/posix-stubs.c. All these overrides need to be available in