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author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-05-03 21:19:54 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-05-03 21:19:54 +0300 |
commit | 9b1f61d5d73d550a20dd79b9a17b6bb05a8f9307 (patch) | |
tree | b1b3c9677f586971212fee1c38500ff5d2b6773a /arch | |
parent | 6f8ee8d36d076b517028b60911877e27bc1d8363 (diff) | |
parent | aafe104aa9096827a429bc1358f8260ee565b7cc (diff) | |
download | linux-9b1f61d5d73d550a20dd79b9a17b6bb05a8f9307.tar.xz |
Merge tag 'trace-v5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing updates from Steven Rostedt:
"New feature:
- A new "func-no-repeats" option in tracefs/options directory.
When set the function tracer will detect if the current function
being traced is the same as the previous one, and instead of
recording it, it will keep track of the number of times that the
function is repeated in a row. And when another function is
recorded, it will write a new event that shows the function that
repeated, the number of times it repeated and the time stamp of
when the last repeated function occurred.
Enhancements:
- In order to implement the above "func-no-repeats" option, the ring
buffer timestamp can now give the accurate timestamp of the event
as it is being recorded, instead of having to record an absolute
timestamp for all events. This helps the histogram code which no
longer needs to waste ring buffer space.
- New validation logic to make sure all trace events that access
dereferenced pointers do so in a safe way, and will warn otherwise.
Fixes:
- No longer limit the PIDs of tasks that are recorded for
"saved_cmdlines" to PID_MAX_DEFAULT (32768), as systemd now allows
for a much larger range. This caused the mapping of PIDs to the
task names to be dropped for all tasks with a PID greater than
32768.
- Change trace_clock_global() to never block. This caused a deadlock.
Clean ups:
- Typos, prototype fixes, and removing of duplicate or unused code.
- Better management of ftrace_page allocations"
* tag 'trace-v5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (32 commits)
tracing: Restructure trace_clock_global() to never block
tracing: Map all PIDs to command lines
ftrace: Reuse the output of the function tracer for func_repeats
tracing: Add "func_no_repeats" option for function tracing
tracing: Unify the logic for function tracing options
tracing: Add method for recording "func_repeats" events
tracing: Add "last_func_repeats" to struct trace_array
tracing: Define new ftrace event "func_repeats"
tracing: Define static void trace_print_time()
ftrace: Simplify the calculation of page number for ftrace_page->records some more
ftrace: Store the order of pages allocated in ftrace_page
tracing: Remove unused argument from "ring_buffer_time_stamp()
tracing: Remove duplicate struct declaration in trace_events.h
tracing: Update create_system_filter() kernel-doc comment
tracing: A minor cleanup for create_system_filter()
kernel: trace: Mundane typo fixes in the file trace_events_filter.c
tracing: Fix various typos in comments
scripts/recordmcount.pl: Make vim and emacs indent the same
scripts/recordmcount.pl: Make indent spacing consistent
tracing: Add a verifier to check string pointers for trace events
...
Diffstat (limited to 'arch')
-rw-r--r-- | arch/microblaze/include/asm/ftrace.h | 2 | ||||
-rw-r--r-- | arch/nds32/kernel/ftrace.c | 2 | ||||
-rw-r--r-- | arch/powerpc/include/asm/ftrace.h | 4 | ||||
-rw-r--r-- | arch/sh/kernel/ftrace.c | 2 | ||||
-rw-r--r-- | arch/sparc/include/asm/ftrace.h | 2 |
5 files changed, 6 insertions, 6 deletions
diff --git a/arch/microblaze/include/asm/ftrace.h b/arch/microblaze/include/asm/ftrace.h index 5db7f4489f05..6a92bed37794 100644 --- a/arch/microblaze/include/asm/ftrace.h +++ b/arch/microblaze/include/asm/ftrace.h @@ -13,7 +13,7 @@ extern void ftrace_call_graph(void); #endif #ifdef CONFIG_DYNAMIC_FTRACE -/* reloction of mcount call site is the same as the address */ +/* relocation of mcount call site is the same as the address */ static inline unsigned long ftrace_call_adjust(unsigned long addr) { return addr; diff --git a/arch/nds32/kernel/ftrace.c b/arch/nds32/kernel/ftrace.c index 414f8a780cc3..0e23e3a8df6b 100644 --- a/arch/nds32/kernel/ftrace.c +++ b/arch/nds32/kernel/ftrace.c @@ -236,7 +236,7 @@ void __naked return_to_handler(void) "bal ftrace_return_to_handler\n\t" "move $lp, $r0 \n\t" - /* restore state nedded by the ABI */ + /* restore state needed by the ABI */ "lmw.bim $r0,[$sp],$r1,#0x0 \n\t"); } diff --git a/arch/powerpc/include/asm/ftrace.h b/arch/powerpc/include/asm/ftrace.h index bc76970b6ee5..debe8c4f7062 100644 --- a/arch/powerpc/include/asm/ftrace.h +++ b/arch/powerpc/include/asm/ftrace.h @@ -12,7 +12,7 @@ #ifdef __ASSEMBLY__ -/* Based off of objdump optput from glibc */ +/* Based off of objdump output from glibc */ #define MCOUNT_SAVE_FRAME \ stwu r1,-48(r1); \ @@ -52,7 +52,7 @@ extern void _mcount(void); static inline unsigned long ftrace_call_adjust(unsigned long addr) { - /* reloction of mcount call site is the same as the address */ + /* relocation of mcount call site is the same as the address */ return addr; } diff --git a/arch/sh/kernel/ftrace.c b/arch/sh/kernel/ftrace.c index 0646c5961846..295c43315bbe 100644 --- a/arch/sh/kernel/ftrace.c +++ b/arch/sh/kernel/ftrace.c @@ -67,7 +67,7 @@ static unsigned char *ftrace_call_replace(unsigned long ip, unsigned long addr) * Modifying code must take extra care. On an SMP machine, if * the code being modified is also being executed on another CPU * that CPU will have undefined results and possibly take a GPF. - * We use kstop_machine to stop other CPUS from exectuing code. + * We use kstop_machine to stop other CPUS from executing code. * But this does not stop NMIs from happening. We still need * to protect against that. We separate out the modification of * the code to take care of this. diff --git a/arch/sparc/include/asm/ftrace.h b/arch/sparc/include/asm/ftrace.h index d3aa1a524431..e284394cb3aa 100644 --- a/arch/sparc/include/asm/ftrace.h +++ b/arch/sparc/include/asm/ftrace.h @@ -17,7 +17,7 @@ void _mcount(void); #endif #ifdef CONFIG_DYNAMIC_FTRACE -/* reloction of mcount call site is the same as the address */ +/* relocation of mcount call site is the same as the address */ static inline unsigned long ftrace_call_adjust(unsigned long addr) { return addr; |