Masami Hiramatsu (Google) a494d3c8d5 ring-buffer: Flush and stop persistent ring buffer on panic ... On real hardware, panic and machine reboot may not flush hardware cache to memory. This means the persistent ring buffer, which relies on a coherent state of memory, may not have its events written to the buffer and they may be lost. Moreover, there may be inconsistency with the counters which are used for validation of the integrity of the persistent ring buffer which may cause all data to be discarded. To avoid this issue, stop recording of the ring buffer on panic and flush the cache of the ring buffer's memory. Fixes: e645535a95 ("tracing: Add option to use memmapped memory for trace boot instance") Cc: stable@vger.kernel.org Cc: Will Deacon <will@kernel.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Ian Rogers <irogers@google.com> Link: https://patch.msgid.link/177751969602.2136606.12031934362587643488.stgit@mhiramat.tok.corp.google.com Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>		2026-05-21 08:20:58 -04:00
..
Kbuild	ring-buffer: Flush and stop persistent ring buffer on panic	2026-05-21 08:20:58 -04:00
arcregs.h	mm: replace (20 - PAGE_SHIFT) with common macros for pages<->MB conversion	2025-09-13 16:54:42 -07:00
asm-offsets.h	…
asserts.h	…
atomic-llsc.h	ARC: atomics: Add compiler barrier to atomic operations...	2023-08-15 17:27:26 -07:00
atomic-spinlock.h	locking/atomic: arc: add preprocessor symbols	2023-06-05 09:57:14 +02:00
atomic.h	ARC: Replace __ASSEMBLY__ with __ASSEMBLER__ in the non-uapi headers	2025-06-09 09:18:12 -07:00
atomic64-arcv2.h	ARC: atomics: Implement arch_atomic64_cmpxchg using _relaxed	2025-06-09 09:18:12 -07:00
barrier.h	…
bitops.h	arc: Fix __fls() const-foldability via __builtin_clzl()	2025-09-02 19:30:51 -04:00
bug.h	ARC: Replace __ASSEMBLY__ with __ASSEMBLER__ in the non-uapi headers	2025-06-09 09:18:12 -07:00
cache.h	ARC: Replace __ASSEMBLY__ with __ASSEMBLER__ in the non-uapi headers	2025-06-09 09:18:12 -07:00
cacheflush.h	percpu:	2024-01-18 15:01:28 -08:00
cachetype.h	mm: introduce cpu_icache_is_aliasing() across all architectures	2024-12-18 19:04:43 -08:00
checksum.h	arc: Prefer unsigned int to bare use of unsigned	2021-08-03 18:58:33 -07:00
cmpxchg.h	ARC: build: Use __force to suppress per-CPU cmpxchg warnings	2024-12-10 10:12:56 -08:00
current.h	ARC: Replace __ASSEMBLY__ with __ASSEMBLER__ in the non-uapi headers	2025-06-09 09:18:12 -07:00
delay.h	…
disasm.h	…
dma.h	PCI: Move isa_dma_bridge_buggy out of asm/dma.h	2022-07-22 17:24:47 -05:00
dsp-impl.h	ARC: Replace __ASSEMBLY__ with __ASSEMBLER__ in the non-uapi headers	2025-06-09 09:18:12 -07:00
dsp.h	ARC: Replace __ASSEMBLY__ with __ASSEMBLER__ in the non-uapi headers	2025-06-09 09:18:12 -07:00
dwarf.h	ARC: Replace __ASSEMBLY__ with __ASSEMBLER__ in the non-uapi headers	2025-06-09 09:18:12 -07:00
elf.h	…
entry-arcv2.h	ARC: entry: SAVE_ABI_CALLEE_REG: ISA/ABI specific helper	2023-12-08 16:30:24 -08:00
entry-compact.h	ARC: Fix typos	2024-04-01 18:40:39 -07:00
entry.h	ARC: Replace __ASSEMBLY__ with __ASSEMBLER__ in the non-uapi headers	2025-06-09 09:18:12 -07:00
exec.h	…
fpu.h	…
futex.h	…
highmem.h	…
hugepage.h	arch: remove mk_pmd()	2025-05-11 17:48:04 -07:00
io.h	asm-generic: provide generic page_to_phys and phys_to_page implementations	2024-10-28 21:44:28 +00:00
irq.h	ARC: Fix typos	2024-04-01 18:40:39 -07:00
irqflags-arcv2.h	ARC: Replace __ASSEMBLY__ with __ASSEMBLER__ in the non-uapi headers	2025-06-09 09:18:12 -07:00
irqflags-compact.h	ARC: Replace __ASSEMBLY__ with __ASSEMBLER__ in the non-uapi headers	2025-06-09 09:18:12 -07:00
irqflags.h	…
jump_label.h	ARC: Replace __ASSEMBLY__ with __ASSEMBLER__ in the non-uapi headers	2025-06-09 09:18:12 -07:00
kdebug.h	…
kgdb.h	…
kprobes.h	kprobes: unify kprobes_exceptions_nofify() prototypes	2023-11-10 19:59:05 +09:00
linkage.h	ARC: Replace __ASSEMBLY__ with __ASSEMBLER__ in the non-uapi headers	2025-06-09 09:18:12 -07:00
mach_desc.h	…
mmu-arcv2.h	ARC: Replace __ASSEMBLY__ with __ASSEMBLER__ in the non-uapi headers	2025-06-09 09:18:12 -07:00
mmu.h	ARC: Replace __ASSEMBLY__ with __ASSEMBLER__ in the non-uapi headers	2025-06-09 09:18:12 -07:00
mmu_context.h	ARC: Fix typos	2024-04-01 18:40:39 -07:00
module.h	…
page.h	mm: convert do_brk_flags() to use vma_flags_t	2026-04-05 13:53:40 -07:00
pci.h	…
perf_event.h	ARC: bpf: define uapi for BPF_PROG_TYPE_PERF_EVENT program type	2022-04-26 09:35:28 -07:00
pgalloc.h	asm-generic: pgalloc: provide generic __pgd_{alloc,free}	2025-01-25 20:22:24 -08:00
pgtable-bits-arcv2.h	ARC fixes for 6.16	2025-06-12 08:17:56 -07:00
pgtable-levels.h	ARC: Replace __ASSEMBLY__ with __ASSEMBLER__ in the non-uapi headers	2025-06-09 09:18:12 -07:00
pgtable.h	arch, mm: consolidate empty_zero_page	2026-04-05 13:53:01 -07:00
processor.h	ARC: Replace __ASSEMBLY__ with __ASSEMBLER__ in the non-uapi headers	2025-06-09 09:18:12 -07:00
ptrace.h	ARC: Replace __ASSEMBLY__ with __ASSEMBLER__ in the non-uapi headers	2025-06-09 09:18:12 -07:00
sections.h	…
serial.h	…
setup.h	ARC: boot log: eliminate struct cpuinfo_arc #4: boot log per ISA	2023-08-17 20:31:59 -07:00
shmparam.h	ARC: Fix typos	2024-04-01 18:40:39 -07:00
smp.h	ARC: Fix typos	2024-04-01 18:40:39 -07:00
spinlock.h	…
spinlock_types.h	…
stacktrace.h	…
string.h	…
switch_to.h	ARC: Replace __ASSEMBLY__ with __ASSEMBLER__ in the non-uapi headers	2025-06-09 09:18:12 -07:00
syscall.h	syscall.h: introduce syscall_set_nr()	2025-05-11 17:48:15 -07:00
syscalls.h	…
thread_info.h	ARC: Replace __ASSEMBLY__ with __ASSEMBLER__ in the non-uapi headers	2025-06-09 09:18:12 -07:00
timex.h	…
tlb.h	…
tlbflush.h	…
uaccess.h	ARC: uaccess: elide unaliged handling if hardware supports	2023-08-17 12:40:26 -07:00
unistd.h	arc: convert to generic syscall table	2024-07-10 14:23:38 +02:00
unwind.h	…
vermagic.h	…
vmalloc.h	…