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authorLinus Torvalds <torvalds@linux-foundation.org>2026-08-18 10:28:28 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2026-08-18 10:28:28 -0700
commitba24659b1dbee90d4ce7ffc7577e299f085533a1 (patch)
tree6b928f169d4cd020133f0ad13f8a29ae6cbc90f8 /Documentation/admin-guide
parent38fda1d9d2f5df55bd1c095aec07de3699091316 (diff)
parent9d50f7c5ad5b4b031c9b85f9a43c626d8268ab51 (diff)
downloadlinux-next-ba24659b1dbee90d4ce7ffc7577e299f085533a1.tar.gz
linux-next-ba24659b1dbee90d4ce7ffc7577e299f085533a1.zip
Merge tag 'kexec-v7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/liveupdate/linux
Pull kexec updates from Mike Rapoport: - Deduplicate crash memory allocation and the exclusion of reserved crash kernel regions from architecture specific code into a generic crash_prepare_headers() and enable crashkernel CMA reservation on arm64 and riscv reservation on arm64 and riscv. - Skip purgatory checksum verification when the kexec segments cannot be corrupted by DMA, which saves about 250ms on kexec. - Replace __ASSEMBLY__ with the compiler provided __ASSEMBLER__ in include/linux/kexec.h. - Fix a keyring refcount imbalance in the kdump kernel's dm-crypt key restore path, which over-dropped the user keyring reference when more than one key was restored. * tag 'kexec-v7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/liveupdate/linux: crash_dump: release keyring reference at the correct time kexec: Replace __ASSEMBLY__ with __ASSEMBLER__ in header file kexec_file: skip checksum verification when safe riscv: kexec_file: Add support for crashkernel CMA reservation arm64: kexec_file: Add support for crashkernel CMA reservation powerpc/kexec_file: Use crash_exclude_core_ranges() helper LoongArch: kexec_file: Use crash_prepare_headers() helper to simplify code riscv: kexec_file: Use crash_prepare_headers() helper to simplify code x86/crash: Use crash_prepare_headers() helper to simplify code arm64: kexec_file: Use crash_prepare_headers() helper to simplify code crash: Add crash_prepare_headers() to exclude crash kernel memory powerpc/crash: sort crash memory ranges before preparing elfcorehdr riscv: kexec_file: Fix crashk_low_res not exclude bug
Diffstat (limited to 'Documentation/admin-guide')
-rw-r--r--Documentation/admin-guide/kernel-parameters.txt16
1 files changed, 8 insertions, 8 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index c6ce3ccf5e04..68bbc7315f90 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -1090,14 +1090,14 @@ Kernel parameters
It will be ignored when crashkernel=X,high is not used
or memory reserved is below 4G.
crashkernel=size[KMG],cma
- [KNL, X86, ppc] Reserve additional crash kernel memory from
- CMA. This reservation is usable by the first system's
- userspace memory and kernel movable allocations (memory
- balloon, zswap). Pages allocated from this memory range
- will not be included in the vmcore so this should not
- be used if dumping of userspace memory is intended and
- it has to be expected that some movable kernel pages
- may be missing from the dump.
+ [KNL, X86, ARM64, RISCV, PPC] Reserve additional crash
+ kernel memory from CMA. This reservation is usable by
+ the first system's userspace memory and kernel movable
+ allocations (memory balloon, zswap). Pages allocated
+ from this memory range will not be included in the vmcore
+ so this should not be used if dumping of userspace memory
+ is intended and it has to be expected that some movable
+ kernel pages may be missing from the dump.
A standard crashkernel reservation, as described above,
is still needed to hold the crash kernel and initrd.