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author | Ingo Molnar <mingo@elte.hu> | 2009-05-08 10:50:00 +0200 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2009-05-08 10:50:00 +0200 |
commit | f066a155334642b8a206eec625b1925d88c48aeb (patch) | |
tree | cb12975e60b70d1dae3b7397bab955de78a4d01e /kernel/trace | |
parent | e7c064889606aab3569669078c69b87b2c527e72 (diff) | |
parent | 33df4db04a79660150e1948e3296eeb451ac121b (diff) | |
download | op-kernel-dev-f066a155334642b8a206eec625b1925d88c48aeb.zip op-kernel-dev-f066a155334642b8a206eec625b1925d88c48aeb.tar.gz |
Merge branch 'x86/urgent' into x86/xen
Conflicts:
arch/frv/include/asm/pgtable.h
arch/x86/include/asm/required-features.h
arch/x86/xen/mmu.c
Merge reason: x86/xen was on a .29 base still, move it to a fresher
branch and pick up Xen fixes as well, plus resolve
conflicts
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/trace')
-rw-r--r-- | kernel/trace/Kconfig | 4 | ||||
-rw-r--r-- | kernel/trace/blktrace.c | 17 | ||||
-rw-r--r-- | kernel/trace/trace.c | 58 | ||||
-rw-r--r-- | kernel/trace/trace.h | 2 | ||||
-rw-r--r-- | kernel/trace/trace_branch.c | 8 | ||||
-rw-r--r-- | kernel/trace/trace_events.c | 12 | ||||
-rw-r--r-- | kernel/trace/trace_events_filter.c | 14 | ||||
-rw-r--r-- | kernel/trace/trace_events_stage_2.h | 4 | ||||
-rw-r--r-- | kernel/trace/trace_export.c | 2 | ||||
-rw-r--r-- | kernel/trace/trace_output.c | 2 | ||||
-rw-r--r-- | kernel/trace/trace_power.c | 7 | ||||
-rw-r--r-- | kernel/trace/trace_sched_switch.c | 3 | ||||
-rw-r--r-- | kernel/trace/trace_sched_wakeup.c | 8 | ||||
-rw-r--r-- | kernel/trace/trace_syscalls.c | 2 |
14 files changed, 98 insertions, 45 deletions
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index 2246141..417d198 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -312,7 +312,7 @@ config KMEMTRACE and profile kernel code. This requires an userspace application to use. See - Documentation/vm/kmemtrace.txt for more information. + Documentation/trace/kmemtrace.txt for more information. Saying Y will make the kernel somewhat larger and slower. However, if you disable kmemtrace at run-time or boot-time, the performance @@ -403,7 +403,7 @@ config MMIOTRACE implementation and works via page faults. Tracing is disabled by default and can be enabled at run-time. - See Documentation/tracers/mmiotrace.txt. + See Documentation/trace/mmiotrace.txt. If you are not helping to develop drivers, say N. config MMIOTRACE_TEST diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c index 947c5b3..921ef5d 100644 --- a/kernel/trace/blktrace.c +++ b/kernel/trace/blktrace.c @@ -327,10 +327,10 @@ static ssize_t blk_msg_write(struct file *filp, const char __user *buffer, char *msg; struct blk_trace *bt; - if (count > BLK_TN_MAX_MSG) + if (count >= BLK_TN_MAX_MSG) return -EINVAL; - msg = kmalloc(count, GFP_KERNEL); + msg = kmalloc(count + 1, GFP_KERNEL); if (msg == NULL) return -ENOMEM; @@ -339,6 +339,7 @@ static ssize_t blk_msg_write(struct file *filp, const char __user *buffer, return -EFAULT; } + msg[count] = '\0'; bt = filp->private_data; __trace_note_message(bt, "%s", msg); kfree(msg); @@ -642,7 +643,7 @@ static void blk_add_trace_rq(struct request_queue *q, struct request *rq, if (blk_pc_request(rq)) { what |= BLK_TC_ACT(BLK_TC_PC); __blk_add_trace(bt, 0, rq->data_len, rw, what, rq->errors, - sizeof(rq->cmd), rq->cmd); + rq->cmd_len, rq->cmd); } else { what |= BLK_TC_ACT(BLK_TC_FS); __blk_add_trace(bt, rq->hard_sector, rq->hard_nr_sectors << 9, @@ -1376,12 +1377,12 @@ static int blk_trace_str2mask(const char *str) { int i; int mask = 0; - char *s, *token; + char *buf, *s, *token; - s = kstrdup(str, GFP_KERNEL); - if (s == NULL) + buf = kstrdup(str, GFP_KERNEL); + if (buf == NULL) return -ENOMEM; - s = strstrip(s); + s = strstrip(buf); while (1) { token = strsep(&s, ","); @@ -1402,7 +1403,7 @@ static int blk_trace_str2mask(const char *str) break; } } - kfree(s); + kfree(buf); return mask; } diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index a0174a4..a884c09 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -30,6 +30,7 @@ #include <linux/percpu.h> #include <linux/splice.h> #include <linux/kdebug.h> +#include <linux/string.h> #include <linux/ctype.h> #include <linux/init.h> #include <linux/poll.h> @@ -147,8 +148,7 @@ static int __init set_ftrace_dump_on_oops(char *str) } __setup("ftrace_dump_on_oops", set_ftrace_dump_on_oops); -long -ns2usecs(cycle_t nsec) +unsigned long long ns2usecs(cycle_t nsec) { nsec += 500; do_div(nsec, 1000); @@ -1632,7 +1632,11 @@ static void test_cpu_buff_start(struct trace_iterator *iter) return; cpumask_set_cpu(iter->cpu, iter->started); - trace_seq_printf(s, "##### CPU %u buffer started ####\n", iter->cpu); + + /* Don't print started cpu buffer for the first entry of the trace */ + if (iter->idx > 1) + trace_seq_printf(s, "##### CPU %u buffer started ####\n", + iter->cpu); } static enum print_line_t print_trace_fmt(struct trace_iterator *iter) @@ -1867,6 +1871,11 @@ __tracing_open(struct inode *inode, struct file *file) if (current_trace) *iter->trace = *current_trace; + if (!alloc_cpumask_var(&iter->started, GFP_KERNEL)) + goto fail; + + cpumask_clear(iter->started); + if (current_trace && current_trace->print_max) iter->tr = &max_tr; else @@ -1917,6 +1926,7 @@ __tracing_open(struct inode *inode, struct file *file) if (iter->buffer_iter[cpu]) ring_buffer_read_finish(iter->buffer_iter[cpu]); } + free_cpumask_var(iter->started); fail: mutex_unlock(&trace_types_lock); kfree(iter->trace); @@ -1960,6 +1970,7 @@ static int tracing_release(struct inode *inode, struct file *file) seq_release(inode, file); mutex_destroy(&iter->mutex); + free_cpumask_var(iter->started); kfree(iter->trace); kfree(iter); return 0; @@ -2358,9 +2369,9 @@ static const char readme_msg[] = "# mkdir /debug\n" "# mount -t debugfs nodev /debug\n\n" "# cat /debug/tracing/available_tracers\n" - "wakeup preemptirqsoff preemptoff irqsoff ftrace sched_switch none\n\n" + "wakeup preemptirqsoff preemptoff irqsoff function sched_switch nop\n\n" "# cat /debug/tracing/current_tracer\n" - "none\n" + "nop\n" "# echo sched_switch > /debug/tracing/current_tracer\n" "# cat /debug/tracing/current_tracer\n" "sched_switch\n" @@ -3266,19 +3277,13 @@ static int tracing_buffers_open(struct inode *inode, struct file *filp) info->tr = &global_trace; info->cpu = cpu; - info->spare = ring_buffer_alloc_read_page(info->tr->buffer); + info->spare = NULL; /* Force reading ring buffer for first read */ info->read = (unsigned int)-1; - if (!info->spare) - goto out; filp->private_data = info; - return 0; - - out: - kfree(info); - return -ENOMEM; + return nonseekable_open(inode, filp); } static ssize_t @@ -3293,6 +3298,11 @@ tracing_buffers_read(struct file *filp, char __user *ubuf, if (!count) return 0; + if (!info->spare) + info->spare = ring_buffer_alloc_read_page(info->tr->buffer); + if (!info->spare) + return -ENOMEM; + /* Do we have previous read data to read? */ if (info->read < PAGE_SIZE) goto read; @@ -3331,7 +3341,8 @@ static int tracing_buffers_release(struct inode *inode, struct file *file) { struct ftrace_buffer_info *info = file->private_data; - ring_buffer_free_read_page(info->tr->buffer, info->spare); + if (info->spare) + ring_buffer_free_read_page(info->tr->buffer, info->spare); kfree(info); return 0; @@ -3417,14 +3428,19 @@ tracing_buffers_splice_read(struct file *file, loff_t *ppos, int size, i; size_t ret; - /* - * We can't seek on a buffer input - */ - if (unlikely(*ppos)) - return -ESPIPE; + if (*ppos & (PAGE_SIZE - 1)) { + WARN_ONCE(1, "Ftrace: previous read must page-align\n"); + return -EINVAL; + } + if (len & (PAGE_SIZE - 1)) { + WARN_ONCE(1, "Ftrace: splice_read should page-align\n"); + if (len < PAGE_SIZE) + return -EINVAL; + len &= PAGE_MASK; + } - for (i = 0; i < PIPE_BUFFERS && len; i++, len -= size) { + for (i = 0; i < PIPE_BUFFERS && len; i++, len -= PAGE_SIZE) { struct page *page; int r; @@ -3432,6 +3448,7 @@ tracing_buffers_splice_read(struct file *file, loff_t *ppos, if (!ref) break; + ref->ref = 1; ref->buffer = info->tr->buffer; ref->page = ring_buffer_alloc_read_page(ref->buffer); if (!ref->page) { @@ -3463,6 +3480,7 @@ tracing_buffers_splice_read(struct file *file, loff_t *ppos, spd.partial[i].offset = 0; spd.partial[i].private = (unsigned long)ref; spd.nr_pages++; + *ppos += PAGE_SIZE; } spd.nr_pages = i; diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index cbc168f..e685ac2 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -602,7 +602,7 @@ extern int trace_selftest_startup_branch(struct tracer *trace, #endif /* CONFIG_FTRACE_STARTUP_TEST */ extern void *head_page(struct trace_array_cpu *data); -extern long ns2usecs(cycle_t nsec); +extern unsigned long long ns2usecs(cycle_t nsec); extern int trace_vbprintk(unsigned long ip, const char *fmt, va_list args); extern int diff --git a/kernel/trace/trace_branch.c b/kernel/trace/trace_branch.c index ad8c22e..8333715 100644 --- a/kernel/trace/trace_branch.c +++ b/kernel/trace/trace_branch.c @@ -155,6 +155,13 @@ static enum print_line_t trace_branch_print(struct trace_iterator *iter, return TRACE_TYPE_HANDLED; } +static void branch_print_header(struct seq_file *s) +{ + seq_puts(s, "# TASK-PID CPU# TIMESTAMP CORRECT" + " FUNC:FILE:LINE\n"); + seq_puts(s, "# | | | | | " + " |\n"); +} static struct trace_event trace_branch_event = { .type = TRACE_BRANCH, @@ -169,6 +176,7 @@ static struct tracer branch_trace __read_mostly = #ifdef CONFIG_FTRACE_SELFTEST .selftest = trace_selftest_startup_branch, #endif /* CONFIG_FTRACE_SELFTEST */ + .print_header = branch_print_header, }; __init static int init_branch_tracer(void) diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c index 64ec4d2..576f4fa 100644 --- a/kernel/trace/trace_events.c +++ b/kernel/trace/trace_events.c @@ -503,6 +503,7 @@ event_filter_write(struct file *filp, const char __user *ubuf, size_t cnt, if (copy_from_user(&buf, ubuf, cnt)) return -EFAULT; + buf[cnt] = '\0'; pred = kzalloc(sizeof(*pred), GFP_KERNEL); if (!pred) @@ -520,9 +521,10 @@ event_filter_write(struct file *filp, const char __user *ubuf, size_t cnt, return cnt; } - if (filter_add_pred(call, pred)) { + err = filter_add_pred(call, pred); + if (err < 0) { filter_free_pred(pred); - return -EINVAL; + return err; } *ppos += cnt; @@ -569,6 +571,7 @@ subsystem_filter_write(struct file *filp, const char __user *ubuf, size_t cnt, if (copy_from_user(&buf, ubuf, cnt)) return -EFAULT; + buf[cnt] = '\0'; pred = kzalloc(sizeof(*pred), GFP_KERNEL); if (!pred) @@ -586,10 +589,11 @@ subsystem_filter_write(struct file *filp, const char __user *ubuf, size_t cnt, return cnt; } - if (filter_add_subsystem_pred(system, pred)) { + err = filter_add_subsystem_pred(system, pred); + if (err < 0) { filter_free_subsystem_preds(system); filter_free_pred(pred); - return -EINVAL; + return err; } *ppos += cnt; diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c index 026be41..e03cbf1 100644 --- a/kernel/trace/trace_events_filter.c +++ b/kernel/trace/trace_events_filter.c @@ -215,7 +215,7 @@ static int __filter_add_pred(struct ftrace_event_call *call, } } - return -ENOMEM; + return -ENOSPC; } static int is_string_field(const char *type) @@ -319,7 +319,7 @@ int filter_add_subsystem_pred(struct event_subsystem *system, } if (i == MAX_FILTER_PRED) - return -EINVAL; + return -ENOSPC; events_for_each(call) { int err; @@ -410,16 +410,22 @@ int filter_parse(char **pbuf, struct filter_pred *pred) } } + if (!val_str) { + pred->field_name = NULL; + return -EINVAL; + } + pred->field_name = kstrdup(pred->field_name, GFP_KERNEL); if (!pred->field_name) return -ENOMEM; - pred->val = simple_strtoull(val_str, &tmp, 10); + pred->val = simple_strtoull(val_str, &tmp, 0); if (tmp == val_str) { pred->str_val = kstrdup(val_str, GFP_KERNEL); if (!pred->str_val) return -ENOMEM; - } + } else if (*tmp != '\0') + return -EINVAL; return 0; } diff --git a/kernel/trace/trace_events_stage_2.h b/kernel/trace/trace_events_stage_2.h index 30743f7..d363c66 100644 --- a/kernel/trace/trace_events_stage_2.h +++ b/kernel/trace/trace_events_stage_2.h @@ -105,10 +105,10 @@ ftrace_raw_output_##call(struct trace_iterator *iter, int flags) \ return 0; #undef __entry -#define __entry "REC" +#define __entry REC #undef TP_printk -#define TP_printk(fmt, args...) "%s, %s\n", #fmt, #args +#define TP_printk(fmt, args...) "%s, %s\n", #fmt, __stringify(args) #undef TP_fast_assign #define TP_fast_assign(args...) args diff --git a/kernel/trace/trace_export.c b/kernel/trace/trace_export.c index 4d9952d..07a22c3 100644 --- a/kernel/trace/trace_export.c +++ b/kernel/trace/trace_export.c @@ -40,7 +40,7 @@ #undef TRACE_FIELD_ZERO_CHAR #define TRACE_FIELD_ZERO_CHAR(item) \ - ret = trace_seq_printf(s, "\tfield: char " #item ";\t" \ + ret = trace_seq_printf(s, "\tfield:char " #item ";\t" \ "offset:%u;\tsize:0;\n", \ (unsigned int)offsetof(typeof(field), item)); \ if (!ret) \ diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c index d72b9a6..64b54a5 100644 --- a/kernel/trace/trace_output.c +++ b/kernel/trace/trace_output.c @@ -423,7 +423,7 @@ int trace_print_lat_context(struct trace_iterator *iter) trace_find_cmdline(entry->pid, comm); - ret = trace_seq_printf(s, "%16s %5d %3d %d %08x %08lx [%08lx]" + ret = trace_seq_printf(s, "%16s %5d %3d %d %08x %08lx [%08llx]" " %ld.%03ldms (+%ld.%03ldms): ", comm, entry->pid, iter->cpu, entry->flags, entry->preempt_count, iter->idx, diff --git a/kernel/trace/trace_power.c b/kernel/trace/trace_power.c index bae791e..1184397 100644 --- a/kernel/trace/trace_power.c +++ b/kernel/trace/trace_power.c @@ -186,6 +186,12 @@ static enum print_line_t power_print_line(struct trace_iterator *iter) return TRACE_TYPE_UNHANDLED; } +static void power_print_header(struct seq_file *s) +{ + seq_puts(s, "# TIMESTAMP STATE EVENT\n"); + seq_puts(s, "# | | |\n"); +} + static struct tracer power_tracer __read_mostly = { .name = "power", @@ -194,6 +200,7 @@ static struct tracer power_tracer __read_mostly = .stop = stop_power_trace, .reset = power_trace_reset, .print_line = power_print_line, + .print_header = power_print_header, }; static int init_power_trace(void) diff --git a/kernel/trace/trace_sched_switch.c b/kernel/trace/trace_sched_switch.c index de35f20..9117cea 100644 --- a/kernel/trace/trace_sched_switch.c +++ b/kernel/trace/trace_sched_switch.c @@ -62,6 +62,9 @@ probe_sched_wakeup(struct rq *__rq, struct task_struct *wakee, int success) pc = preempt_count(); tracing_record_cmdline(current); + if (sched_stopped) + return; + local_irq_save(flags); cpu = raw_smp_processor_id(); data = ctx_trace->data[cpu]; diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c index 3c5ad6b..5bc00e8f 100644 --- a/kernel/trace/trace_sched_wakeup.c +++ b/kernel/trace/trace_sched_wakeup.c @@ -154,7 +154,7 @@ probe_wakeup_sched_switch(struct rq *rq, struct task_struct *prev, if (unlikely(!tracer_enabled || next != wakeup_task)) goto out_unlock; - trace_function(wakeup_trace, CALLER_ADDR1, CALLER_ADDR2, flags, pc); + trace_function(wakeup_trace, CALLER_ADDR0, CALLER_ADDR1, flags, pc); tracing_sched_switch_trace(wakeup_trace, prev, next, flags, pc); /* @@ -257,6 +257,12 @@ probe_wakeup(struct rq *rq, struct task_struct *p, int success) data = wakeup_trace->data[wakeup_cpu]; data->preempt_timestamp = ftrace_now(cpu); tracing_sched_wakeup_trace(wakeup_trace, p, current, flags, pc); + + /* + * We must be careful in using CALLER_ADDR2. But since wake_up + * is not called by an assembly function (where as schedule is) + * it should be safe to use it here. + */ trace_function(wakeup_trace, CALLER_ADDR1, CALLER_ADDR2, flags, pc); out_locked: diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c index a2a3af2..5e57964 100644 --- a/kernel/trace/trace_syscalls.c +++ b/kernel/trace/trace_syscalls.c @@ -1,5 +1,5 @@ +#include <trace/syscall.h> #include <linux/kernel.h> -#include <linux/ftrace.h> #include <asm/syscall.h> #include "trace_output.h" |