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7ae4ba7195
linux/scripts
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Steven Rostedt (Google) 7ae4ba7195 ftrace/scripts: Update the instructions for ftrace-bisect.sh 
The instructions for the ftrace-bisect.sh script, which is used to find
what function is being traced that is causing a kernel crash, and possibly
a triple fault reboot, uses the old method. In 5.1, a new feature was
added that let the user write in the index into available_filter_functions
that maps to the function a user wants to set in set_ftrace_filter (or
set_ftrace_notrace). This takes O(1) to set, as suppose to writing a
function name, which takes O(n) (where n is the number of functions in
available_filter_functions).

The ftrace-bisect.sh requires setting half of the functions in
available_filter_functions, which is O(n^2) using the name method to enable
and can take several minutes to complete. The number method is O(n) which
takes less than a second to complete. Using the number method for any
kernel 5.1 and after is the proper way to do the bisect.

Update the usage to reflect the new change, as well as using the
/sys/kernel/tracing path instead of the obsolete debugfs path.

Link: https://lkml.kernel.org/r/20230123112252.022003dd@gandalf.local.home

Cc: stable@vger.kernel.org
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Fixes: f79b3f3385 ("ftrace: Allow enabling of filters via index of available_filter_functions")
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2023-01-24 13:13:07 -05:00
..
atomic kbuild: check sha1sum just once for each atomic header 2022-09-29 04:40:14 +09:00
basic fixdep: remove unneeded <stdarg.h> inclusion 2022-12-30 17:26:19 +09:00
clang-tools kbuild: change module.order to list *.o instead of *.ko 2022-12-14 15:42:40 +09:00
coccinelle update Coccinelle URL 2022-08-07 21:30:36 +02:00
dtc scripts/dtc: Update to upstream version v1.6.1-63-g55778a03df61 2022-11-10 08:37:19 -06:00
dummy-tools kbuild: dummy-tools: pretend we understand __LONG_DOUBLE_128__ 2022-08-21 02:47:48 +09:00
gcc-plugins treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_385.RULE 2022-06-10 14:51:36 +02:00
gdb Updates to various subsystems which I help look after. lib, ocfs2, 2022-08-07 10:03:24 -07:00
genksyms genksyms: adjust the output format to modpost 2022-05-24 16:33:20 +09:00
kconfig kconfig: Update all declared targets 2023-01-13 16:29:52 +09:00
ksymoops
mod Kbuild updates for v6.2 2022-12-19 12:33:32 -06:00
package scripts: rpm: make clear that mkspec script contains 4.13 feature 2023-01-11 20:42:34 +09:00
selinux selinux: remove runtime disable message in the install_policy.sh script 2022-09-20 14:12:25 -04:00
tracing ftrace/scripts: Update the instructions for ftrace-bisect.sh 2023-01-24 13:13:07 -05:00
.gitignore scripts: add generate_rust_target.rs 2022-09-28 09:02:06 +02:00
adjust_autoksyms.sh kbuild: split the second line of *.mod into *.usyms 2022-05-08 03:16:59 +09:00
as-version.sh kbuild: Switch to 'f' variants of integrated assembler flag 2021-09-03 08:17:20 +09:00
asn1_compiler.c scripts: remove unused argument 'type' 2022-09-29 04:40:16 +09:00
bin2c.c
bloat-o-meter scripts/bloat-o-meter: add -p argument 2022-07-17 17:31:40 -07:00
bootgraph.pl
bpf_doc.py bpf: Rework process_dynptr_func 2022-12-08 18:25:31 -08:00
cc-can-link.sh
cc-version.sh Kbuild: add Rust support 2022-09-28 09:02:20 +02:00
check_extable.sh scripts: check_extable: fix typo in user error message 2021-09-08 11:50:28 -07:00
check-local-export kbuild: rewrite check-local-export in sh/awk 2022-09-29 04:40:15 +09:00
check-sysctl-docs
checkdeclares.pl scripts: make some scripts executable 2021-08-10 09:13:25 +09:00
checkincludes.pl
checkkconfigsymbols.py checkkconfigsymbols.py: Remove skipping of help lines in parse_kconfig_file 2021-09-19 10:13:03 +09:00
checkpatch.pl checkpatch: add check for array allocator family argument order 2022-11-30 16:13:16 -08:00
checkstack.pl checkstack: add riscv support for scripts/checkstack.pl 2022-07-27 21:18:00 +09:00
checksyscalls.sh checksyscalls: ignore -Wunused-macros 2022-05-08 03:16:59 +09:00
checkversion.pl scripts: checkversion: modernize linux/version.h search strings 2021-08-05 20:55:39 +09:00
cleanfile
cleanpatch
coccicheck scripts: coccicheck: use "grep -E" instead of "egrep" 2022-09-21 21:23:56 +02:00
config kconfig: config script: add a little user help 2021-01-04 10:38:11 +09:00
const_structs.checkpatch const_structs.checkpatch: add frequently used ops structs 2022-01-20 08:52:54 +02:00
decode_stacktrace.sh scripts: decode_stacktrace: demangle Rust symbols 2022-09-28 09:01:40 +02:00
decodecode scripts/decodecode: improve faulting line determination 2022-09-11 21:55:05 -07:00
depmod.sh depmod: handle the case of /sbin/depmod without /sbin in PATH 2021-01-01 12:26:39 -08:00
dev-needs.sh scripts/dev-needs: Add script to list device dependencies 2020-09-04 18:19:37 +02:00
diffconfig scripts: switch explicitly to Python 3 2021-01-22 06:34:44 +09:00
documentation-file-ref-check scripts: documentation-file-ref-check: fix bpf selftests path 2021-10-26 09:42:29 -06:00
export_report.pl modpost: move the namespace field in Module.symvers last 2020-03-17 08:59:03 +09:00
extract_xc3028.pl
extract-ikconfig scripts/extract-ikconfig: add zstd compression support 2022-08-29 13:58:47 +09:00
extract-module-sig.pl
extract-sys-certs.pl
extract-vmlinux
faddr2line scripts/faddr2line: Fix regression in name resolution on ppc64le 2022-11-16 10:42:10 +01:00
file-size.sh
find-unused-docs.sh
gcc-x86_32-has-stack-protector.sh x86/stackprotector/32: Make the canary into a regular percpu variable 2021-03-08 13:19:05 +01:00
gcc-x86_64-has-stack-protector.sh
gen_autoksyms.sh kbuild: change module.order to list *.o instead of *.ko 2022-12-14 15:42:40 +09:00
gen_ksymdeps.sh kbuild: redo fake deps at include/ksym/*.h 2021-09-03 08:17:21 +09:00
gen-randstruct-seed.sh randstruct: Move seed generation into scripts/basic/ 2022-05-08 01:33:07 -07:00
generate_initcall_order.pl init: lto: ensure initcall ordering 2021-01-14 08:21:09 -08:00
generate_rust_analyzer.py rust: add build_error crate 2022-12-04 01:59:16 +01:00
generate_rust_target.rs x86: enable initial Rust support 2022-09-28 09:02:45 +02:00
get_abi.pl scripts/get_abi: Fix wrong script file name in the help message 2022-04-24 10:38:44 +02:00
get_dvb_firmware
get_feat.pl scripts: get_feat.pl: use /usr/bin/env to find perl 2022-06-30 12:22:17 -06:00
get_maintainer.pl get_maintainer: Honor mailmap for in file emails 2022-04-29 14:38:00 -07:00
gfp-translate
head-object-list.txt RISC-V Patches for the 6.2 Merge Window, Part 1 2022-12-14 15:23:49 -08:00
headerdep.pl
headers_install.sh scripts: headers_install.sh: Update config leak ignore entries 2022-07-27 21:18:00 +09:00
insert-sys-cert.c
install.sh kbuild: factor out the common installation code into scripts/install.sh 2022-05-11 21:45:53 +09:00
is_rust_module.sh scripts: add is_rust_module.sh 2022-09-28 09:02:06 +02:00
jobserver-exec scripts: support GNU make 4.4 in jobserver-exec 2023-01-16 20:15:20 +09:00
kallsyms.c Char/Misc driver changes for 6.2-rc1 2022-12-16 03:49:24 -08:00
Kbuild.include kbuild: use .NOTINTERMEDIATE for future GNU Make versions 2022-12-13 22:29:10 +09:00
Kconfig.include Kbuild: add Rust support 2022-09-28 09:02:20 +02:00
kernel-doc hardening updates for v6.2-rc1 2022-12-14 12:20:00 -08:00
ld-version.sh kbuild: collect minimum tool versions into scripts/min-tool-version.sh 2021-04-25 05:14:26 +09:00
leaking_addresses.pl leaking_addresses: Always print a trailing newline 2021-10-15 11:25:13 +02:00
Lindent
link-vmlinux.sh kallsyms: Correctly sequence symbols when CONFIG_LTO_CLANG=y 2022-11-12 18:47:36 -08:00
Makefile Kbuild: add Rust support 2022-09-28 09:02:20 +02:00
Makefile.asm-generic kbuild: add kbuild-file macro 2022-11-22 23:40:02 +09:00
Makefile.build Kbuild updates for v6.2 2022-12-19 12:33:32 -06:00
Makefile.clang um: Allow builds with Clang 2022-03-21 08:13:03 -07:00
Makefile.clean kbuild: add kbuild-file macro 2022-11-22 23:40:02 +09:00
Makefile.compiler kbuild: add test-{ge,gt,le,lt} macros 2022-12-13 22:21:14 +09:00
Makefile.debug Makefile.debug: support for -gz=zstd 2022-11-21 10:18:39 +09:00
Makefile.dtbinst kbuild: add kbuild-file macro 2022-11-22 23:40:02 +09:00
Makefile.extrawarn kbuild: add -Wundef to KBUILD_CPPFLAGS for W=1 builds 2022-12-11 17:28:32 +09:00
Makefile.gcc-plugins gcc-plugins: Undefine LATENT_ENTROPY_PLUGIN when plugin disabled for a file 2022-08-16 12:25:53 -07:00
Makefile.headersinst kbuild: prefix $(srctree)/ to some included Makefiles 2021-03-15 19:20:48 +09:00
Makefile.host Kbuild: add Rust support 2022-09-28 09:02:20 +02:00
Makefile.kasan kasan: always respect CONFIG_KASAN_STACK 2021-09-24 16:13:35 -07:00
Makefile.kcov kbuild: include scripts/Makefile.* only when relevant CONFIG is enabled 2020-08-10 01:32:59 +09:00
Makefile.kcsan kcsan: Ignore GCC 11+ warnings about TSan runtime support 2021-12-09 16:42:27 -08:00
Makefile.kmsan kmsan: add KMSAN runtime core 2022-10-03 14:03:19 -07:00
Makefile.lib powerpc updates for 6.2 2022-12-19 07:13:33 -06:00
Makefile.modfinal kbuild: change module.order to list *.o instead of *.ko 2022-12-14 15:42:40 +09:00
Makefile.modinst kbuild: change module.order to list *.o instead of *.ko 2022-12-14 15:42:40 +09:00
Makefile.modpost kbuild: readd -w option when vmlinux.o or Module.symver is missing 2023-01-05 16:53:48 +09:00
Makefile.package kbuild: add a missing line for help message 2022-12-30 17:22:14 +09:00
Makefile.randstruct randstruct: Enable Clang support 2022-05-08 01:33:07 -07:00
Makefile.ubsan ubsan: remove CONFIG_UBSAN_OBJECT_SIZE 2022-01-20 08:52:55 +02:00
Makefile.userprogs kbuild: add infrastructure to build userspace programs 2020-05-17 18:52:01 +09:00
Makefile.vmlinux kbuild: Fix CFI hash randomization with KASAN 2023-01-13 15:22:03 -08:00
Makefile.vmlinux_o kbuild: move modules.builtin(.modinfo) rules to Makefile.vmlinux_o 2022-10-03 03:52:58 +09:00
makelst
markup_oops.pl
min-tool-version.sh Documentation: raise minimum supported version of binutils to 2.25 2022-12-13 22:21:14 +09:00
mkcompile_h Revert "kbuild: Make scripts/compile.h when sh != bash" 2022-09-29 04:40:15 +09:00
mksysmap kallsyms: ignore __kstrtab_* and __kstrtabns_* symbols 2022-10-03 03:51:58 +09:00
mkuboot.sh
module.lds.S arm64: unwind: add asynchronous unwind tables to kernel and modules 2022-11-09 18:06:35 +00:00
modules-check.sh kbuild: change module.order to list *.o instead of *.ko 2022-12-14 15:42:40 +09:00
nsdeps scripts/nsdeps: adjust to the format change of *.mod files 2022-06-08 20:14:13 +09:00
objdiff kbuild: clean .tmp_* pattern by make clean 2022-06-05 06:20:57 +09:00
objdump-func scripts: Create objdump-func helper script 2022-05-12 10:08:43 -07:00
pahole-flags.sh scripts/pahole-flags.sh: Parse DWARF and generate BTF with multithreading. 2022-02-22 14:32:44 -08:00
pahole-version.sh kbuild: Add CONFIG_PAHOLE_VERSION 2022-02-02 11:19:33 +01:00
parse-maintainers.pl parse-maintainers: Do not sort section content by default 2020-03-26 15:08:27 -07:00
patch-kernel
profile2linkerlist.pl
prune-kernel scripts/prune-kernel: Use kernel-install if available 2022-05-11 21:46:38 +09:00
recordmcount.c LoongArch/ftrace: Add recordmcount support 2022-12-14 08:41:53 +08:00
recordmcount.h recordmcount: Correct st_shndx handling 2021-06-18 09:09:17 -04:00
recordmcount.pl nds32: Remove the architecture 2022-03-07 13:54:59 +01:00
remove-stale-files kconfig: refactor Makefile to reduce process forks 2022-12-13 22:29:10 +09:00
rust_is_available_bindgen_libclang.h scripts: add rust_is_available.sh 2022-09-28 09:02:06 +02:00
rust_is_available.sh scripts: add rust_is_available.sh 2022-09-28 09:02:06 +02:00
setlocalversion kbuild: do not quote string values in include/config/auto.conf 2022-01-08 18:03:57 +09:00
show_delta tweewide: Fix most Shebang lines 2020-12-08 23:30:04 +09:00
sign-file.c sign-file: Fix confusing error messages 2022-08-03 23:56:20 +03:00
sorttable.c LoongArch: extable: Add type and data fields 2022-12-14 08:36:11 +08:00
sorttable.h script/sorttable: Fix some initialization problems 2022-01-18 10:17:18 -05:00
spdxcheck-test.sh docs: move Linux logo into a new images folder 2022-06-01 09:32:45 -06:00
spdxcheck.py scripts/spdxcheck: Put excluded files and directories into a separate file 2022-05-18 15:34:33 +02:00
spdxexclude scripts/spdxcheck: Exclude top-level README 2022-05-18 15:35:42 +02:00
spelling.txt scripts/spelling.txt: add more spellings to spelling.txt 2022-11-18 13:55:09 -08:00
sphinx-pre-install docs: sphinx-pre-install: don't require the RTD theme 2022-10-13 11:14:43 -06:00
split-man.pl tweewide: Fix most Shebang lines 2020-12-08 23:30:04 +09:00
stackdelta
stackusage
subarch.include LoongArch: Add build infrastructure 2022-06-03 20:09:27 +08:00
syscallhdr.sh scripts: check duplicated syscall number in syscall table 2021-07-09 04:00:39 +09:00
syscallnr.sh scripts: make some scripts executable 2021-08-10 09:13:25 +09:00
syscalltbl.sh scripts: check duplicated syscall number in syscall table 2021-07-09 04:00:39 +09:00
tags.sh scripts/tags.sh: Include tools directory in tags generation 2022-07-01 10:32:30 +02:00
test_fortify.sh fortify: Update compile-time tests for Clang 14 2022-02-13 16:50:06 -08:00
tools-support-relr.sh Makefile: fix GDB warning with CONFIG_RELR 2021-06-08 13:09:34 +01:00
unifdef.c
ver_linux Removed the oprofiled version option 2021-05-03 17:23:06 -06:00
xen-hypercalls.sh scripts: make some scripts executable 2021-08-10 09:13:25 +09:00
xz_wrap.sh kbuild: add variables for compression tools 2020-06-06 23:42:01 +09:00