From: Andrew Morton <akpm@linux-foundation.org>
To: akpm@linux-foundation.org, alex.popov@linux.com,
andriy.shevchenko@linux.intel.com, arnd@arndb.de,
elver@google.com, glider@google.com, john.ogness@linutronix.de,
linux-mm@kvack.org, mcgrof@kernel.org, mingo@redhat.com,
mm-commits@vger.kernel.org, pmladek@suse.com,
rostedt@goodmis.org, rppt@kernel.org,
torvalds@linux-foundation.org, wei.liu@kernel.org
Subject: [patch 42/55] panic: use error_report_end tracepoint on warnings
Date: Wed, 19 Jan 2022 18:09:56 -0800 [thread overview]
Message-ID: <20220120020956.7nXS_wTfb%akpm@linux-foundation.org> (raw)
In-Reply-To: <20220119180714.9e187ce100e4510de3cd9f7d@linux-foundation.org>
From: Marco Elver <elver@google.com>
Subject: panic: use error_report_end tracepoint on warnings
Introduce the error detector "warning" to the error_report event and use
the error_report_end tracepoint at the end of a warning report.
This allows in-kernel tests but also userspace to more easily determine
if a warning occurred without polling kernel logs.
[akpm@linux-foundation.org: add comma to enum list, per Andy]
Link: https://lkml.kernel.org/r/20211115085630.1756817-1-elver@google.com
Signed-off-by: Marco Elver <elver@google.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Wei Liu <wei.liu@kernel.org>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: John Ogness <john.ogness@linutronix.de>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Alexander Popov <alex.popov@linux.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
include/trace/events/error_report.h | 8 +++++---
kernel/panic.c | 2 ++
2 files changed, 7 insertions(+), 3 deletions(-)
--- a/include/trace/events/error_report.h~panic-use-error_report_end-tracepoint-on-warnings
+++ a/include/trace/events/error_report.h
@@ -17,14 +17,16 @@
enum error_detector {
ERROR_DETECTOR_KFENCE,
- ERROR_DETECTOR_KASAN
+ ERROR_DETECTOR_KASAN,
+ ERROR_DETECTOR_WARN,
};
#endif /* __ERROR_REPORT_DECLARE_TRACE_ENUMS_ONCE_ONLY */
-#define error_detector_list \
+#define error_detector_list \
EM(ERROR_DETECTOR_KFENCE, "kfence") \
- EMe(ERROR_DETECTOR_KASAN, "kasan")
+ EM(ERROR_DETECTOR_KASAN, "kasan") \
+ EMe(ERROR_DETECTOR_WARN, "warning")
/* Always end the list with an EMe. */
#undef EM
--- a/kernel/panic.c~panic-use-error_report_end-tracepoint-on-warnings
+++ a/kernel/panic.c
@@ -32,6 +32,7 @@
#include <linux/bug.h>
#include <linux/ratelimit.h>
#include <linux/debugfs.h>
+#include <trace/events/error_report.h>
#include <asm/sections.h>
#define PANIC_TIMER_STEP 100
@@ -609,6 +610,7 @@ void __warn(const char *file, int line,
print_irqtrace_events(current);
print_oops_end_marker();
+ trace_error_report_end(ERROR_DETECTOR_WARN, (unsigned long)caller);
/* Just a warning, don't kill lockdep. */
add_taint(taint, LOCKDEP_STILL_OK);
_
next prev parent reply other threads:[~2022-01-20 2:10 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-20 2:07 incoming Andrew Morton
2022-01-20 2:07 ` [patch 01/55] mm: percpu: generalize percpu related config Andrew Morton
2022-01-20 2:07 ` [patch 02/55] mm: percpu: add pcpu_fc_cpu_to_node_fn_t typedef Andrew Morton
2022-01-20 2:07 ` [patch 03/55] mm: percpu: add generic pcpu_fc_alloc/free funciton Andrew Morton
2022-01-20 2:07 ` [patch 04/55] mm: percpu: add generic pcpu_populate_pte() function Andrew Morton
2022-01-20 2:07 ` [patch 05/55] proc/vmcore: don't fake reading zeroes on surprise vmcore_cb unregistration Andrew Morton
2022-01-20 2:08 ` [patch 06/55] proc: make the proc_create[_data]() stubs static inlines Andrew Morton
2022-01-20 2:08 ` [patch 07/55] proc: convert the return type of proc_fd_access_allowed() to be boolean Andrew Morton
2022-01-20 2:08 ` [patch 08/55] sysctl: fix duplicate path separator in printed entries Andrew Morton
2022-01-20 2:08 ` [patch 09/55] sysctl: remove redundant ret assignment Andrew Morton
2022-01-20 2:08 ` [patch 10/55] include/linux/unaligned: replace kernel.h with the necessary inclusions Andrew Morton
2022-01-20 2:08 ` [patch 11/55] kernel.h: include a note to discourage people from including it in headers Andrew Morton
2022-01-20 2:08 ` [patch 12/55] fs/exec: replace strlcpy with strscpy_pad in __set_task_comm Andrew Morton
2022-01-20 2:08 ` [patch 13/55] fs/exec: replace strncpy with strscpy_pad in __get_task_comm Andrew Morton
2022-01-20 2:08 ` [patch 14/55] drivers/infiniband: replace open-coded string copy with get_task_comm Andrew Morton
2022-01-20 2:08 ` [patch 15/55] fs/binfmt_elf: " Andrew Morton
2022-01-20 2:08 ` [patch 16/55] samples/bpf/test_overhead_kprobe_kern: replace bpf_probe_read_kernel with bpf_probe_read_kernel_str to get task comm Andrew Morton
2022-01-20 2:08 ` [patch 17/55] tools/bpf/bpftool/skeleton: " Andrew Morton
2022-01-20 2:08 ` [patch 18/55] tools/testing/selftests/bpf: replace open-coded 16 with TASK_COMM_LEN Andrew Morton
2022-01-20 2:08 ` [patch 19/55] kthread: dynamically allocate memory to store kthread's full name Andrew Morton
2022-01-20 2:08 ` [patch 20/55] kernel/sys.c: only take tasklist_lock for get/setpriority(PRIO_PGRP) Andrew Morton
2022-01-20 2:08 ` [patch 21/55] get_maintainer: don't remind about no git repo when --nogit is used Andrew Morton
2022-01-20 2:08 ` [patch 22/55] kstrtox: uninline everything Andrew Morton
2022-01-20 2:08 ` [patch 23/55] list: introduce list_is_head() helper and re-use it in list.h Andrew Morton
2022-01-20 2:08 ` [patch 24/55] lib/list_debug.c: print more list debugging context in __list_del_entry_valid() Andrew Morton
2022-01-20 2:09 ` [patch 25/55] hash.h: remove unused define directive Andrew Morton
2022-01-20 2:09 ` [patch 26/55] test_hash.c: split test_int_hash into arch-specific functions Andrew Morton
2022-01-20 2:09 ` [patch 27/55] test_hash.c: split test_hash_init Andrew Morton
2022-01-20 2:09 ` [patch 28/55] lib/Kconfig.debug: properly split hash test kernel entries Andrew Morton
2022-01-20 2:09 ` [patch 29/55] test_hash.c: refactor into kunit Andrew Morton
2022-01-20 2:09 ` [patch 30/55] kunit: replace kernel.h with the necessary inclusions Andrew Morton
2022-01-20 2:09 ` [patch 31/55] uuid: discourage people from using UAPI header in new code Andrew Morton
2022-01-20 2:09 ` [patch 32/55] uuid: remove licence boilerplate text from the header Andrew Morton
2022-01-20 2:09 ` [patch 33/55] lib/test_meminit: destroy cache in kmem_cache_alloc_bulk() test Andrew Morton
2022-01-20 2:09 ` [patch 34/55] checkpatch: relax regexp for COMMIT_LOG_LONG_LINE Andrew Morton
2022-01-20 2:09 ` [patch 35/55] checkpatch: improve Kconfig help test Andrew Morton
2022-01-20 2:09 ` [patch 36/55] const_structs.checkpatch: add frequently used ops structs Andrew Morton
2022-01-20 2:09 ` [patch 37/55] fs/binfmt_elf: use PT_LOAD p_align values for static PIE Andrew Morton
2022-01-20 2:09 ` [patch 38/55] nilfs2: remove redundant pointer sbufs Andrew Morton
2022-01-20 2:09 ` [patch 39/55] hfsplus: use struct_group_attr() for memcpy() region Andrew Morton
2022-01-20 2:09 ` [patch 40/55] FAT: use io_schedule_timeout() instead of congestion_wait() Andrew Morton
2022-01-20 2:09 ` [patch 41/55] fs/adfs: remove unneeded variable make code cleaner Andrew Morton
2022-01-20 2:09 ` Andrew Morton [this message]
2022-01-20 2:09 ` [patch 43/55] panic: remove oops_id Andrew Morton
2022-01-20 2:10 ` [patch 44/55] delayacct: support swapin delay accounting for swapping without blkio Andrew Morton
2022-01-20 2:10 ` [patch 45/55] delayacct: fix incomplete disable operation when switch enable to disable Andrew Morton
2022-01-20 2:10 ` [patch 46/55] delayacct: cleanup flags in struct task_delay_info and functions use it Andrew Morton
2022-01-20 2:10 ` [patch 47/55] Documentation/accounting/delay-accounting.rst: add thrashing page cache and direct compact Andrew Morton
2022-01-20 2:10 ` [patch 48/55] delayacct: track delays from memory compact Andrew Morton
2022-01-20 2:10 ` [patch 49/55] configs: introduce debug.config for CI-like setup Andrew Morton
2022-01-20 2:10 ` [patch 50/55] arch/Kconfig: split PAGE_SIZE_LESS_THAN_256KB from PAGE_SIZE_LESS_THAN_64KB Andrew Morton
2022-01-20 2:10 ` [patch 51/55] btrfs: use generic Kconfig option for 256kB page size limit Andrew Morton
2022-01-20 2:10 ` [patch 52/55] lib/Kconfig.debug: make TEST_KMOD depend on PAGE_SIZE_LESS_THAN_256KB Andrew Morton
2022-01-20 2:10 ` [patch 53/55] kcov: fix generic Kconfig dependencies if ARCH_WANTS_NO_INSTR Andrew Morton
2022-01-20 2:10 ` [patch 54/55] ubsan: remove CONFIG_UBSAN_OBJECT_SIZE Andrew Morton
2022-01-20 2:10 ` [patch 55/55] lib: remove redundant assignment to variable ret Andrew Morton
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