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Merge branch 'tip/perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/urgent

Browse source
This commit is contained in:
Ingo Molnar 2011-05-27 14:28:09 +02:00
commit d6a72fe465
17 changed files with 148 additions and 41 deletions
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4
arch/blackfin/mm/maccess.c
View file

@ -16,7 +16,7 @@ static int validate_memory_access_address(unsigned long addr, int size)
return bfin_mem_access_type(addr, size);
}
long probe_kernel_read(void *dst, void *src, size_t size)
long probe_kernel_read(void *dst, const void *src, size_t size)
{
unsigned long lsrc = (unsigned long)src;
int mem_type;
@ -55,7 +55,7 @@ long probe_kernel_read(void *dst, void *src, size_t size)
return -EFAULT;
}
long probe_kernel_write(void *dst, void *src, size_t size)
long probe_kernel_write(void *dst, const void *src, size_t size)
{
unsigned long ldst = (unsigned long)dst;
int mem_type;

4
arch/s390/mm/maccess.c
View file

@ -19,7 +19,7 @@
* using the stura instruction.
* Returns the number of bytes copied or -EFAULT.
*/
static long probe_kernel_write_odd(void *dst, void *src, size_t size)
static long probe_kernel_write_odd(void *dst, const void *src, size_t size)
{
unsigned long count, aligned;
int offset, mask;
@ -45,7 +45,7 @@ static long probe_kernel_write_odd(void *dst, void *src, size_t size)
return rc ? rc : count;
}
long probe_kernel_write(void *dst, void *src, size_t size)
long probe_kernel_write(void *dst, const void *src, size_t size)
{
long copied = 0;

12
arch/x86/kernel/ftrace.c
View file

@ -123,7 +123,7 @@ static unsigned char *ftrace_call_replace(unsigned long ip, unsigned long addr)
static atomic_t nmi_running = ATOMIC_INIT(0);
static int mod_code_status; /* holds return value of text write */
static void *mod_code_ip; /* holds the IP to write to */
static void *mod_code_newcode; /* holds the text to write to the IP */
static const void *mod_code_newcode; /* holds the text to write to the IP */
static unsigned nmi_wait_count;
static atomic_t nmi_update_count = ATOMIC_INIT(0);
@ -225,7 +225,7 @@ within(unsigned long addr, unsigned long start, unsigned long end)
}
static int
do_ftrace_mod_code(unsigned long ip, void *new_code)
do_ftrace_mod_code(unsigned long ip, const void *new_code)
{
/*
* On x86_64, kernel text mappings are mapped read-only with
@ -266,8 +266,8 @@ static const unsigned char *ftrace_nop_replace(void)
}
static int
ftrace_modify_code(unsigned long ip, unsigned char *old_code,
unsigned char *new_code)
ftrace_modify_code(unsigned long ip, unsigned const char *old_code,
unsigned const char *new_code)
{
unsigned char replaced[MCOUNT_INSN_SIZE];
@ -301,7 +301,7 @@ ftrace_modify_code(unsigned long ip, unsigned char *old_code,
int ftrace_make_nop(struct module *mod,
struct dyn_ftrace *rec, unsigned long addr)
{
unsigned char *new, *old;
unsigned const char *new, *old;
unsigned long ip = rec->ip;
old = ftrace_call_replace(ip, addr);
@ -312,7 +312,7 @@ int ftrace_make_nop(struct module *mod,
int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
{
unsigned char *new, *old;
unsigned const char *new, *old;
unsigned long ip = rec->ip;
old = ftrace_nop_replace();

12
include/linux/ftrace_event.h
View file

@ -16,6 +16,11 @@ struct trace_print_flags {
const char *name;
};
struct trace_print_flags_u64 {
unsigned long long mask;
const char *name;
};
const char *ftrace_print_flags_seq(struct trace_seq *p, const char *delim,
unsigned long flags,
const struct trace_print_flags *flag_array);
@ -23,6 +28,13 @@ const char *ftrace_print_flags_seq(struct trace_seq *p, const char *delim,
const char *ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val,
const struct trace_print_flags *symbol_array);
#if BITS_PER_LONG == 32
const char *ftrace_print_symbols_seq_u64(struct trace_seq *p,
unsigned long long val,
const struct trace_print_flags_u64
*symbol_array);
#endif
const char *ftrace_print_hex_seq(struct trace_seq *p,
const unsigned char *buf, int len);

2
include/linux/sched.h
View file

@ -1535,7 +1535,7 @@ struct task_struct {
#ifdef CONFIG_TRACING
/* state flags for use by tracers */
unsigned long trace;
/* bitmask of trace recursion */
/* bitmask and counter of trace recursion */
unsigned long trace_recursion;
#endif /* CONFIG_TRACING */
#ifdef CONFIG_CGROUP_MEM_RES_CTLR /* memcg uses this to do batch job */

8
include/linux/uaccess.h
View file

@ -93,8 +93,8 @@ static inline unsigned long __copy_from_user_nocache(void *to,
* Safely read from address @src to the buffer at @dst. If a kernel fault
* happens, handle that and return -EFAULT.
*/
extern long probe_kernel_read(void *dst, void *src, size_t size);
extern long __probe_kernel_read(void *dst, void *src, size_t size);
extern long probe_kernel_read(void *dst, const void *src, size_t size);
extern long __probe_kernel_read(void *dst, const void *src, size_t size);
/*
* probe_kernel_write(): safely attempt to write to a location
@ -105,7 +105,7 @@ extern long __probe_kernel_read(void *dst, void *src, size_t size);
* Safely write to address @dst from the buffer at @src. If a kernel fault
* happens, handle that and return -EFAULT.
*/
extern long notrace probe_kernel_write(void *dst, void *src, size_t size);
extern long notrace __probe_kernel_write(void *dst, void *src, size_t size);
extern long notrace probe_kernel_write(void *dst, const void *src, size_t size);
extern long notrace __probe_kernel_write(void *dst, const void *src, size_t size);
#endif /* __LINUX_UACCESS_H__ */

4
include/trace/events/btrfs.h
View file

@ -28,7 +28,7 @@ struct extent_buffer;
{ BTRFS_SHARED_DATA_REF_KEY, "SHARED_DATA_REF" })
#define __show_root_type(obj) \
__print_symbolic(obj, \
__print_symbolic_u64(obj, \
{ BTRFS_ROOT_TREE_OBJECTID, "ROOT_TREE" }, \
{ BTRFS_EXTENT_TREE_OBJECTID, "EXTENT_TREE" }, \
{ BTRFS_CHUNK_TREE_OBJECTID, "CHUNK_TREE" }, \
@ -125,7 +125,7 @@ DEFINE_EVENT(btrfs__inode, btrfs_inode_evict,
);
#define __show_map_type(type) \
__print_symbolic(type, \
__print_symbolic_u64(type, \
{ EXTENT_MAP_LAST_BYTE, "LAST_BYTE" }, \
{ EXTENT_MAP_HOLE, "HOLE" }, \
{ EXTENT_MAP_INLINE, "INLINE" }, \

13
include/trace/ftrace.h
View file

@ -205,6 +205,19 @@
ftrace_print_symbols_seq(p, value, symbols); \
})
#undef __print_symbolic_u64
#if BITS_PER_LONG == 32
#define __print_symbolic_u64(value, symbol_array...) \
({ \
static const struct trace_print_flags_u64 symbols[] = \
{ symbol_array, { -1, NULL } }; \
ftrace_print_symbols_seq_u64(p, value, symbols); \
})
#else
#define __print_symbolic_u64(value, symbol_array...) \
__print_symbolic(value, symbol_array)
#endif
#undef __print_hex
#define __print_hex(buf, buf_len) ftrace_print_hex_seq(p, buf, buf_len)

18
kernel/jump_label.c
View file

@ -105,9 +105,12 @@ static int __jump_label_text_reserved(struct jump_entry *iter_start,
}
static void __jump_label_update(struct jump_label_key *key,
struct jump_entry *entry, int enable)
struct jump_entry *entry,
struct jump_entry *stop, int enable)
{
for (; entry->key == (jump_label_t)(unsigned long)key; entry++) {
for (; (entry < stop) &&
(entry->key == (jump_label_t)(unsigned long)key);
entry++) {
/*
* entry->code set to 0 invalidates module init text sections
* kernel_text_address() verifies we are not in core kernel
@ -181,7 +184,11 @@ static void __jump_label_mod_update(struct jump_label_key *key, int enable)
struct jump_label_mod *mod = key->next;
while (mod) {
__jump_label_update(key, mod->entries, enable);
struct module *m = mod->mod;
__jump_label_update(key, mod->entries,
m->jump_entries + m->num_jump_entries,
enable);
mod = mod->next;
}
}
@ -245,7 +252,8 @@ static int jump_label_add_module(struct module *mod)
key->next = jlm;
if (jump_label_enabled(key))
__jump_label_update(key, iter, JUMP_LABEL_ENABLE);
__jump_label_update(key, iter, iter_stop,
JUMP_LABEL_ENABLE);
}
return 0;
@ -371,7 +379,7 @@ static void jump_label_update(struct jump_label_key *key, int enable)
/* if there are no users, entry can be NULL */
if (entry)
__jump_label_update(key, entry, enable);
__jump_label_update(key, entry, __stop___jump_table, enable);
#ifdef CONFIG_MODULES
__jump_label_mod_update(key, enable);

31
kernel/trace/ftrace.c
View file

@ -109,12 +109,18 @@ ftrace_ops_list_func(unsigned long ip, unsigned long parent_ip);
static void ftrace_global_list_func(unsigned long ip,
unsigned long parent_ip)
{
struct ftrace_ops *op = rcu_dereference_raw(ftrace_global_list); /*see above*/
struct ftrace_ops *op;
if (unlikely(trace_recursion_test(TRACE_GLOBAL_BIT)))
return;
trace_recursion_set(TRACE_GLOBAL_BIT);
op = rcu_dereference_raw(ftrace_global_list); /*see above*/
while (op != &ftrace_list_end) {
op->func(ip, parent_ip);
op = rcu_dereference_raw(op->next); /*see above*/
};
trace_recursion_clear(TRACE_GLOBAL_BIT);
}
static void ftrace_pid_func(unsigned long ip, unsigned long parent_ip)
@ -1638,12 +1644,12 @@ static void ftrace_startup_enable(int command)
ftrace_run_update_code(command);
}
static void ftrace_startup(struct ftrace_ops *ops, int command)
static int ftrace_startup(struct ftrace_ops *ops, int command)
{
bool hash_enable = true;
if (unlikely(ftrace_disabled))
return;
return -ENODEV;
ftrace_start_up++;
command |= FTRACE_ENABLE_CALLS;
@ -1662,6 +1668,8 @@ static void ftrace_startup(struct ftrace_ops *ops, int command)
ftrace_hash_rec_enable(ops, 1);
ftrace_startup_enable(command);
return 0;
}
static void ftrace_shutdown(struct ftrace_ops *ops, int command)
@ -2501,7 +2509,7 @@ static void __enable_ftrace_function_probe(void)
ret = __register_ftrace_function(&trace_probe_ops);
if (!ret)
ftrace_startup(&trace_probe_ops, 0);
ret = ftrace_startup(&trace_probe_ops, 0);
ftrace_probe_registered = 1;
}
@ -3466,7 +3474,11 @@ device_initcall(ftrace_nodyn_init);
static inline int ftrace_init_dyn_debugfs(struct dentry *d_tracer) { return 0; }
static inline void ftrace_startup_enable(int command) { }
/* Keep as macros so we do not need to define the commands */
# define ftrace_startup(ops, command) do { } while (0)
# define ftrace_startup(ops, command) \
({ \
(ops)->flags |= FTRACE_OPS_FL_ENABLED; \
0; \
})
# define ftrace_shutdown(ops, command) do { } while (0)
# define ftrace_startup_sysctl() do { } while (0)
# define ftrace_shutdown_sysctl() do { } while (0)
@ -3484,6 +3496,10 @@ ftrace_ops_list_func(unsigned long ip, unsigned long parent_ip)
{
struct ftrace_ops *op;
if (unlikely(trace_recursion_test(TRACE_INTERNAL_BIT)))
return;
trace_recursion_set(TRACE_INTERNAL_BIT);
/*
* Some of the ops may be dynamically allocated,
* they must be freed after a synchronize_sched().
@ -3496,6 +3512,7 @@ ftrace_ops_list_func(unsigned long ip, unsigned long parent_ip)
op = rcu_dereference_raw(op->next);
};
preempt_enable_notrace();
trace_recursion_clear(TRACE_INTERNAL_BIT);
}
static void clear_ftrace_swapper(void)
@ -3799,7 +3816,7 @@ int register_ftrace_function(struct ftrace_ops *ops)
ret = __register_ftrace_function(ops);
if (!ret)
ftrace_startup(ops, 0);
ret = ftrace_startup(ops, 0);
out_unlock:
@ -4045,7 +4062,7 @@ int register_ftrace_graph(trace_func_graph_ret_t retfunc,
ftrace_graph_return = retfunc;
ftrace_graph_entry = entryfunc;
ftrace_startup(&global_ops, FTRACE_START_FUNC_RET);
ret = ftrace_startup(&global_ops, FTRACE_START_FUNC_RET);
out:
mutex_unlock(&ftrace_lock);

10
kernel/trace/ring_buffer.c
View file

@ -2216,7 +2216,7 @@ static noinline void trace_recursive_fail(void)
printk_once(KERN_WARNING "Tracing recursion: depth[%ld]:"
"HC[%lu]:SC[%lu]:NMI[%lu]\n",
current->trace_recursion,
trace_recursion_buffer(),
hardirq_count() >> HARDIRQ_SHIFT,
softirq_count() >> SOFTIRQ_SHIFT,
in_nmi());
@ -2226,9 +2226,9 @@ static noinline void trace_recursive_fail(void)
static inline int trace_recursive_lock(void)
{
current->trace_recursion++;
trace_recursion_inc();
if (likely(current->trace_recursion < TRACE_RECURSIVE_DEPTH))
if (likely(trace_recursion_buffer() < TRACE_RECURSIVE_DEPTH))
return 0;
trace_recursive_fail();
@ -2238,9 +2238,9 @@ static inline int trace_recursive_lock(void)
static inline void trace_recursive_unlock(void)
{
WARN_ON_ONCE(!current->trace_recursion);
WARN_ON_ONCE(!trace_recursion_buffer());
current->trace_recursion--;
trace_recursion_dec();
}
#else

15
kernel/trace/trace.h
View file

@ -784,4 +784,19 @@ extern const char *__stop___trace_bprintk_fmt[];
FTRACE_ENTRY(call, struct_name, id, PARAMS(tstruct), PARAMS(print))
#include "trace_entries.h"
/* Only current can touch trace_recursion */
#define trace_recursion_inc() do { (current)->trace_recursion++; } while (0)
#define trace_recursion_dec() do { (current)->trace_recursion--; } while (0)
/* Ring buffer has the 10 LSB bits to count */
#define trace_recursion_buffer() ((current)->trace_recursion & 0x3ff)
/* for function tracing recursion */
#define TRACE_INTERNAL_BIT (1<<11)
#define TRACE_GLOBAL_BIT (1<<12)
#define trace_recursion_set(bit) do { (current)->trace_recursion |= (bit); } while (0)
#define trace_recursion_clear(bit) do { (current)->trace_recursion &= ~(bit); } while (0)
#define trace_recursion_test(bit) ((current)->trace_recursion & (bit))
#endif /* _LINUX_KERNEL_TRACE_H */

7
kernel/trace/trace_events.c
View file

@ -1657,7 +1657,12 @@ static struct ftrace_ops trace_ops __initdata =
static __init void event_trace_self_test_with_function(void)
{
register_ftrace_function(&trace_ops);
int ret;
ret = register_ftrace_function(&trace_ops);
if (WARN_ON(ret < 0)) {
pr_info("Failed to enable function tracer for event tests\n");
return;
}
pr_info("Running tests again, along with the function tracer\n");
event_trace_self_tests();
unregister_ftrace_function(&trace_ops);

27
kernel/trace/trace_output.c
View file

@ -353,6 +353,33 @@ ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val,
}
EXPORT_SYMBOL(ftrace_print_symbols_seq);
#if BITS_PER_LONG == 32
const char *
ftrace_print_symbols_seq_u64(struct trace_seq *p, unsigned long long val,
const struct trace_print_flags_u64 *symbol_array)
{
int i;
const char *ret = p->buffer + p->len;
for (i = 0; symbol_array[i].name; i++) {
if (val != symbol_array[i].mask)
continue;
trace_seq_puts(p, symbol_array[i].name);
break;
}
if (!p->len)
trace_seq_printf(p, "0x%llx", val);
trace_seq_putc(p, 0);
return ret;
}
EXPORT_SYMBOL(ftrace_print_symbols_seq_u64);
#endif
const char *
ftrace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len)
{

8
mm/maccess.c
View file

@ -15,10 +15,10 @@
* happens, handle that and return -EFAULT.
*/
long __weak probe_kernel_read(void *dst, void *src, size_t size)
long __weak probe_kernel_read(void *dst, const void *src, size_t size)
__attribute__((alias("__probe_kernel_read")));
long __probe_kernel_read(void *dst, void *src, size_t size)
long __probe_kernel_read(void *dst, const void *src, size_t size)
{
long ret;
mm_segment_t old_fs = get_fs();
@ -43,10 +43,10 @@ EXPORT_SYMBOL_GPL(probe_kernel_read);
* Safely write to address @dst from the buffer at @src. If a kernel fault
* happens, handle that and return -EFAULT.
*/
long __weak probe_kernel_write(void *dst, void *src, size_t size)
long __weak probe_kernel_write(void *dst, const void *src, size_t size)
__attribute__((alias("__probe_kernel_write")));
long __probe_kernel_write(void *dst, void *src, size_t size)
long __probe_kernel_write(void *dst, const void *src, size_t size)
{
long ret;
mm_segment_t old_fs = get_fs();

8
scripts/recordmcount.h
View file

@ -43,6 +43,7 @@
#undef ELF_R_INFO
#undef Elf_r_info
#undef ELF_ST_BIND
#undef ELF_ST_TYPE
#undef fn_ELF_R_SYM
#undef fn_ELF_R_INFO
#undef uint_t
@ -76,6 +77,7 @@
# define ELF_R_INFO ELF64_R_INFO
# define Elf_r_info Elf64_r_info
# define ELF_ST_BIND ELF64_ST_BIND
# define ELF_ST_TYPE ELF64_ST_TYPE
# define fn_ELF_R_SYM fn_ELF64_R_SYM
# define fn_ELF_R_INFO fn_ELF64_R_INFO
# define uint_t uint64_t
@ -108,6 +110,7 @@
# define ELF_R_INFO ELF32_R_INFO
# define Elf_r_info Elf32_r_info
# define ELF_ST_BIND ELF32_ST_BIND
# define ELF_ST_TYPE ELF32_ST_TYPE
# define fn_ELF_R_SYM fn_ELF32_R_SYM
# define fn_ELF_R_INFO fn_ELF32_R_INFO
# define uint_t uint32_t
@ -427,6 +430,11 @@ static unsigned find_secsym_ndx(unsigned const txtndx,
if (txtndx == w2(symp->st_shndx)
/* avoid STB_WEAK */
&& (STB_LOCAL == st_bind || STB_GLOBAL == st_bind)) {
/* function symbols on ARM have quirks, avoid them */
if (w2(ehdr->e_machine) == EM_ARM
&& ELF_ST_TYPE(symp->st_info) == STT_FUNC)
continue;
*recvalp = _w(symp->st_value);
return symp - sym0;
}

6
scripts/tags.sh
View file

@ -132,7 +132,7 @@ exuberant()
--regex-asm='/^ENTRY\(([^)]*)\).*/\1/' \
--regex-c='/^SYSCALL_DEFINE[[:digit:]]?\(([^,)]*).*/sys_\1/' \
--regex-c++='/^TRACE_EVENT\(([^,)]*).*/trace_\1/' \
--regex-c++='/^DEFINE_EVENT\(([^,)]*).*/trace_\1/'
--regex-c++='/^DEFINE_EVENT\([^,)]*, *([^,)]*).*/trace_\1/'
all_kconfigs | xargs $1 -a \
--langdef=kconfig --language-force=kconfig \
@ -152,7 +152,9 @@ emacs()
{
all_sources | xargs $1 -a \
--regex='/^ENTRY(\([^)]*\)).*/\1/' \
--regex='/^SYSCALL_DEFINE[0-9]?(\([^,)]*\).*/sys_\1/'
--regex='/^SYSCALL_DEFINE[0-9]?(\([^,)]*\).*/sys_\1/' \
--regex='/^TRACE_EVENT(\([^,)]*\).*/trace_\1/' \
--regex='/^DEFINE_EVENT([^,)]*, *\([^,)]*\).*/trace_\1/'
all_kconfigs | xargs $1 -a \
--regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/\3/'