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Merge tag 'mm-nonmm-stable-2023-08-28-22-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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Pull non-MM updates from Andrew Morton:

 - An extensive rework of kexec and crash Kconfig from Eric DeVolder
   ("refactor Kconfig to consolidate KEXEC and CRASH options")

 - kernel.h slimming work from Andy Shevchenko ("kernel.h: Split out a
   couple of macros to args.h")

 - gdb feature work from Kuan-Ying Lee ("Add GDB memory helper
   commands")

 - vsprintf inclusion rationalization from Andy Shevchenko
   ("lib/vsprintf: Rework header inclusions")

 - Switch the handling of kdump from a udev scheme to in-kernel
   handling, by Eric DeVolder ("crash: Kernel handling of CPU and memory
   hot un/plug")

 - Many singleton patches to various parts of the tree

* tag 'mm-nonmm-stable-2023-08-28-22-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (81 commits)
  document while_each_thread(), change first_tid() to use for_each_thread()
  drivers/char/mem.c: shrink character device's devlist[] array
  x86/crash: optimize CPU changes
  crash: change crash_prepare_elf64_headers() to for_each_possible_cpu()
  crash: hotplug support for kexec_load()
  x86/crash: add x86 crash hotplug support
  crash: memory and CPU hotplug sysfs attributes
  kexec: exclude elfcorehdr from the segment digest
  crash: add generic infrastructure for crash hotplug support
  crash: move a few code bits to setup support of crash hotplug
  kstrtox: consistently use _tolower()
  kill do_each_thread()
  nilfs2: fix WARNING in mark_buffer_dirty due to discarded buffer reuse
  scripts/bloat-o-meter: count weak symbol sizes
  treewide: drop CONFIG_EMBEDDED
  lockdep: fix static memory detection even more
  lib/vsprintf: declare no_hash_pointers in sprintf.h
  lib/vsprintf: split out sprintf() and friends
  kernel/fork: stop playing lockless games for exe_file replacement
  adfs: delete unused "union adfs_dirtail" definition
  ...
This commit is contained in:
Linus Torvalds
2023-08-29 14:53:51 -07:00
parent b96a3e9142 dce8f8ed1d
commit d68b4b6f30
205 changed files with 2838 additions and 1377 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Documentation/ABI/testing/sysfs-devices-memory
+8
View File
@@ -110,3 +110,11 @@ Description:
link is created for memory section 9 on node0.
/sys/devices/system/node/node0/memory9 -> ../../memory/memory9
What: /sys/devices/system/memory/crash_hotplug
Date: Aug 2023
Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org>
Description:
(RO) indicates whether or not the kernel directly supports
modifying the crash elfcorehdr for memory hot un/plug and/or
on/offline changes.
Documentation/ABI/testing/sysfs-devices-system-cpu
+8
View File
@@ -688,3 +688,11 @@ Description:
(RO) the list of CPUs that are isolated and don't
participate in load balancing. These CPUs are set by
boot parameter "isolcpus=".
What: /sys/devices/system/cpu/crash_hotplug
Date: Aug 2023
Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org>
Description:
(RO) indicates whether or not the kernel directly supports
modifying the crash elfcorehdr for CPU hot un/plug and/or
on/offline changes.
Documentation/admin-guide/mm/memory-hotplug.rst
+8
View File
@@ -291,6 +291,14 @@ The following files are currently defined:
Availability depends on the CONFIG_ARCH_MEMORY_PROBE
kernel configuration option.
``uevent`` read-write: generic udev file for device subsystems.
``crash_hotplug`` read-only: when changes to the system memory map
occur due to hot un/plug of memory, this file contains
'1' if the kernel updates the kdump capture kernel memory
map itself (via elfcorehdr), or '0' if userspace must update
the kdump capture kernel memory map.
Availability depends on the CONFIG_MEMORY_HOTPLUG kernel
configuration option.
====================== =========================================================
.. note::
Documentation/core-api/cpu_hotplug.rst
+18
View File
@@ -741,6 +741,24 @@ will receive all events. A script like::
can process the event further.
When changes to the CPUs in the system occur, the sysfs file
/sys/devices/system/cpu/crash_hotplug contains '1' if the kernel
updates the kdump capture kernel list of CPUs itself (via elfcorehdr),
or '0' if userspace must update the kdump capture kernel list of CPUs.
The availability depends on the CONFIG_HOTPLUG_CPU kernel configuration
option.
To skip userspace processing of CPU hot un/plug events for kdump
(i.e. the unload-then-reload to obtain a current list of CPUs), this sysfs
file can be used in a udev rule as follows:
SUBSYSTEM=="cpu", ATTRS{crash_hotplug}=="1", GOTO="kdump_reload_end"
For a CPU hot un/plug event, if the architecture supports kernel updates
of the elfcorehdr (which contains the list of CPUs), then the rule skips
the unload-then-reload of the kdump capture kernel.
Kernel Inline Documentations Reference
======================================
arch/Kconfig
+3 -14
View File
@@ -11,19 +11,6 @@ source "arch/$(SRCARCH)/Kconfig"
menu "General architecture-dependent options"
config CRASH_CORE
bool
config KEXEC_CORE
select CRASH_CORE
bool
config KEXEC_ELF
bool
config HAVE_IMA_KEXEC
bool
config ARCH_HAS_SUBPAGE_FAULTS
bool
help
@@ -748,7 +735,9 @@ config HAS_LTO_CLANG
depends on $(success,$(AR) --help | head -n 1 | grep -qi llvm)
depends on ARCH_SUPPORTS_LTO_CLANG
depends on !FTRACE_MCOUNT_USE_RECORDMCOUNT
depends on !KASAN || KASAN_HW_TAGS
# https://github.com/ClangBuiltLinux/linux/issues/1721
depends on (!KASAN || KASAN_HW_TAGS || CLANG_VERSION >= 170000) || !DEBUG_INFO
depends on (!KCOV || CLANG_VERSION >= 170000) || !DEBUG_INFO
depends on !GCOV_KERNEL
help
The compiler and Kconfig options support building with Clang's
arch/arc/configs/axs101_defconfig
+1 -1
View File
@@ -9,7 +9,7 @@ CONFIG_NAMESPACES=y
# CONFIG_UTS_NS is not set
# CONFIG_PID_NS is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_EMBEDDED=y
CONFIG_EXPERT=y
CONFIG_PERF_EVENTS=y
# CONFIG_VM_EVENT_COUNTERS is not set
# CONFIG_SLUB_DEBUG is not set
arch/arc/configs/axs103_defconfig
+1 -1
View File
@@ -9,7 +9,7 @@ CONFIG_NAMESPACES=y
# CONFIG_UTS_NS is not set
# CONFIG_PID_NS is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_EMBEDDED=y
CONFIG_EXPERT=y
CONFIG_PERF_EVENTS=y
# CONFIG_VM_EVENT_COUNTERS is not set
# CONFIG_SLUB_DEBUG is not set
arch/arc/configs/axs103_smp_defconfig
+1 -1
View File
@@ -9,7 +9,7 @@ CONFIG_NAMESPACES=y
# CONFIG_UTS_NS is not set
# CONFIG_PID_NS is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_EMBEDDED=y
CONFIG_EXPERT=y
CONFIG_PERF_EVENTS=y
# CONFIG_VM_EVENT_COUNTERS is not set
# CONFIG_COMPAT_BRK is not set
arch/arc/configs/haps_hs_smp_defconfig
+1 -1
View File
@@ -11,7 +11,7 @@ CONFIG_NAMESPACES=y
# CONFIG_UTS_NS is not set
# CONFIG_PID_NS is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_EMBEDDED=y
CONFIG_EXPERT=y
CONFIG_PERF_EVENTS=y
# CONFIG_VM_EVENT_COUNTERS is not set
# CONFIG_COMPAT_BRK is not set
arch/arc/configs/hsdk_defconfig
+1 -1
View File
@@ -9,7 +9,7 @@ CONFIG_NAMESPACES=y
# CONFIG_PID_NS is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_BLK_DEV_RAM=y
CONFIG_EMBEDDED=y
CONFIG_EXPERT=y
CONFIG_PERF_EVENTS=y
# CONFIG_VM_EVENT_COUNTERS is not set
# CONFIG_COMPAT_BRK is not set
arch/arc/configs/nsim_700_defconfig
+1 -1
View File
@@ -12,7 +12,7 @@ CONFIG_NAMESPACES=y
# CONFIG_PID_NS is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_KALLSYMS_ALL=y
CONFIG_EMBEDDED=y
CONFIG_EXPERT=y
CONFIG_PERF_EVENTS=y
# CONFIG_SLUB_DEBUG is not set
# CONFIG_COMPAT_BRK is not set
arch/arc/configs/nsimosci_defconfig
+1 -1
View File
@@ -11,7 +11,7 @@ CONFIG_NAMESPACES=y
# CONFIG_PID_NS is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_KALLSYMS_ALL=y
CONFIG_EMBEDDED=y
CONFIG_EXPERT=y
CONFIG_PERF_EVENTS=y
# CONFIG_SLUB_DEBUG is not set
# CONFIG_COMPAT_BRK is not set
arch/arc/configs/nsimosci_hs_defconfig
+1 -1
View File
@@ -11,7 +11,7 @@ CONFIG_NAMESPACES=y
# CONFIG_PID_NS is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_KALLSYMS_ALL=y
CONFIG_EMBEDDED=y
CONFIG_EXPERT=y
CONFIG_PERF_EVENTS=y
# CONFIG_SLUB_DEBUG is not set
# CONFIG_COMPAT_BRK is not set
arch/arc/configs/tb10x_defconfig
+1 -1
View File
@@ -16,7 +16,7 @@ CONFIG_INITRAMFS_ROOT_GID=501
# CONFIG_RD_GZIP is not set
CONFIG_KALLSYMS_ALL=y
# CONFIG_AIO is not set
CONFIG_EMBEDDED=y
CONFIG_EXPERT=y
# CONFIG_COMPAT_BRK is not set
CONFIG_ISA_ARCOMPACT=y
CONFIG_MODULES=y
arch/arc/configs/vdk_hs38_defconfig
+1 -1
View File
@@ -4,7 +4,7 @@ CONFIG_HIGH_RES_TIMERS=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_EMBEDDED=y
CONFIG_EXPERT=y
CONFIG_PERF_EVENTS=y
# CONFIG_VM_EVENT_COUNTERS is not set
# CONFIG_SLUB_DEBUG is not set
arch/arc/configs/vdk_hs38_smp_defconfig
+1 -1
View File
@@ -4,7 +4,7 @@ CONFIG_HIGH_RES_TIMERS=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_EMBEDDED=y
CONFIG_EXPERT=y
CONFIG_PERF_EVENTS=y
# CONFIG_VM_EVENT_COUNTERS is not set
# CONFIG_SLUB_DEBUG is not set
arch/arm/Kconfig
+5 -26
View File
@@ -250,7 +250,7 @@ config ARCH_MTD_XIP
bool
config ARM_PATCH_PHYS_VIRT
bool "Patch physical to virtual translations at runtime" if EMBEDDED
bool "Patch physical to virtual translations at runtime" if !ARCH_MULTIPLATFORM
default y
depends on MMU
help
@@ -1645,20 +1645,8 @@ config XIP_DEFLATED_DATA
copied, saving some precious ROM space. A possible drawback is a
slightly longer boot delay.
config KEXEC
bool "Kexec system call (EXPERIMENTAL)"
depends on (!SMP || PM_SLEEP_SMP)
depends on MMU
select KEXEC_CORE
help
kexec is a system call that implements the ability to shutdown your
current kernel, and to start another kernel. It is like a reboot
but it is independent of the system firmware. And like a reboot
you can start any kernel with it, not just Linux.
It is an ongoing process to be certain the hardware in a machine
is properly shutdown, so do not be surprised if this code does not
initially work for you.
config ARCH_SUPPORTS_KEXEC
def_bool (!SMP || PM_SLEEP_SMP) && MMU
config ATAGS_PROC
bool "Export atags in procfs"
@@ -1668,17 +1656,8 @@ config ATAGS_PROC
Should the atags used to boot the kernel be exported in an "atags"
file in procfs. Useful with kexec.
config CRASH_DUMP
bool "Build kdump crash kernel (EXPERIMENTAL)"
help
Generate crash dump after being started by kexec. This should
be normally only set in special crash dump kernels which are
loaded in the main kernel with kexec-tools into a specially
reserved region and then later executed after a crash by
kdump/kexec. The crash dump kernel must be compiled to a
memory address not used by the main kernel
For more details see Documentation/admin-guide/kdump/kdump.rst
config ARCH_SUPPORTS_CRASH_DUMP
def_bool y
config AUTO_ZRELADDR
bool "Auto calculation of the decompressed kernel image address" if !ARCH_MULTIPLATFORM
arch/arm/configs/aspeed_g4_defconfig
+1 -1
View File
@@ -15,7 +15,7 @@ CONFIG_BLK_DEV_INITRD=y
# CONFIG_UID16 is not set
# CONFIG_SYSFS_SYSCALL is not set
# CONFIG_AIO is not set
CONFIG_EMBEDDED=y
CONFIG_EXPERT=y
CONFIG_PERF_EVENTS=y
# CONFIG_ARCH_MULTI_V7 is not set
CONFIG_ARCH_ASPEED=y
arch/arm/configs/aspeed_g5_defconfig
+1 -1
View File
@@ -15,7 +15,7 @@ CONFIG_BLK_DEV_INITRD=y
# CONFIG_UID16 is not set
# CONFIG_SYSFS_SYSCALL is not set
# CONFIG_AIO is not set
CONFIG_EMBEDDED=y
CONFIG_EXPERT=y
CONFIG_PERF_EVENTS=y
CONFIG_ARCH_MULTI_V6=y
CONFIG_ARCH_ASPEED=y
arch/arm/configs/at91_dt_defconfig
+1 -1
View File
@@ -7,7 +7,7 @@ CONFIG_CGROUPS=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_KALLSYMS_ALL=y
CONFIG_EMBEDDED=y
CONFIG_EXPERT=y
CONFIG_ARCH_MULTI_V4T=y
CONFIG_ARCH_MULTI_V5=y
# CONFIG_ARCH_MULTI_V7 is not set

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