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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] xen: Changes to printk handling:
# HG changeset patch
# User Keir Fraser <keir@xxxxxxxxxxxxx>
# Date 1191517096 -3600
# Node ID 2d761ca771fb2c19d06a4835bfaca33d76a742f4
# Parent 65c4977850d71c759062019bee3e62c3d335e439
xen: Changes to printk handling:
1. Command-line option 'console_timestamps' adds a timestamp prefix
to each line of Xen console output (x86 only, after CMOS has been
interrogated).
2. Clean up prefix handling and vanity banner info.
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
---
xen/arch/ia64/xen/xensetup.c | 1
xen/arch/x86/time.c | 12 ++++++++++
xen/drivers/char/console.c | 46 ++++++++++++++++++++++++++---------------
xen/include/asm-ia64/time.h | 7 ++++++
xen/include/asm-powerpc/time.h | 3 ++
xen/include/asm-x86/time.h | 3 ++
xen/include/xen/console.h | 2 -
7 files changed, 55 insertions(+), 19 deletions(-)
diff -r 65c4977850d7 -r 2d761ca771fb xen/arch/ia64/xen/xensetup.c
--- a/xen/arch/ia64/xen/xensetup.c Thu Oct 04 14:21:11 2007 +0100
+++ b/xen/arch/ia64/xen/xensetup.c Thu Oct 04 17:58:16 2007 +0100
@@ -315,7 +315,6 @@ void __init start_kernel(void)
#endif
init_console();
- set_printk_prefix("(XEN) ");
if (running_on_sim || ia64_boot_param->domain_start == 0 ||
ia64_boot_param->domain_size == 0) {
diff -r 65c4977850d7 -r 2d761ca771fb xen/arch/x86/time.c
--- a/xen/arch/x86/time.c Thu Oct 04 14:21:11 2007 +0100
+++ b/xen/arch/x86/time.c Thu Oct 04 17:58:16 2007 +0100
@@ -1038,6 +1038,18 @@ int dom0_pit_access(struct ioreq *ioreq)
return 0;
}
+struct tm wallclock_time(void)
+{
+ uint64_t seconds;
+
+ if ( !wc_sec )
+ return (struct tm) { 0 };
+
+ seconds = NOW() + (wc_sec * 1000000000ull) + wc_nsec;
+ do_div(seconds, 1000000000);
+ return gmtime(seconds);
+}
+
/*
* Local variables:
* mode: C
diff -r 65c4977850d7 -r 2d761ca771fb xen/drivers/char/console.c
--- a/xen/drivers/char/console.c Thu Oct 04 14:21:11 2007 +0100
+++ b/xen/drivers/char/console.c Thu Oct 04 17:58:16 2007 +0100
@@ -53,12 +53,14 @@ static int opt_console_to_ring;
static int opt_console_to_ring;
boolean_param("console_to_ring", opt_console_to_ring);
+/* console_timestamps: include a timestamp prefix on every Xen console line. */
+static int opt_console_timestamps;
+boolean_param("console_timestamps", opt_console_timestamps);
+
#define CONRING_SIZE 16384
#define CONRING_IDX_MASK(i) ((i)&(CONRING_SIZE-1))
static char conring[CONRING_SIZE];
static unsigned int conringc, conringp;
-
-static char printk_prefix[16] = "";
static int sercon_handle = -1;
@@ -448,6 +450,26 @@ static int printk_prefix_check(char *p,
((loglvl < upper_thresh) && printk_ratelimit()));
}
+static void printk_start_of_line(void)
+{
+ struct tm tm;
+ char tstr[32];
+
+ __putstr("(XEN) ");
+
+ if ( !opt_console_timestamps )
+ return;
+
+ tm = wallclock_time();
+ if ( tm.tm_mday == 0 )
+ return;
+
+ snprintf(tstr, sizeof(tstr), "[%04u-%02u-%02u %02u:%02u:%02u] ",
+ 1900 + tm.tm_year, tm.tm_mon, tm.tm_mday,
+ tm.tm_hour, tm.tm_min, tm.tm_sec);
+ __putstr(tstr);
+}
+
void printk(const char *fmt, ...)
{
static char buf[1024];
@@ -475,7 +497,7 @@ void printk(const char *fmt, ...)
if ( do_print )
{
if ( start_of_line )
- __putstr(printk_prefix);
+ printk_start_of_line();
__putstr(p);
__putstr("\n");
}
@@ -490,7 +512,7 @@ void printk(const char *fmt, ...)
if ( do_print )
{
if ( start_of_line )
- __putstr(printk_prefix);
+ printk_start_of_line();
__putstr(p);
}
start_of_line = 0;
@@ -498,11 +520,6 @@ void printk(const char *fmt, ...)
spin_unlock_recursive(&console_lock);
local_irq_restore(flags);
-}
-
-void set_printk_prefix(const char *prefix)
-{
- safe_strcpy(printk_prefix, prefix);
}
void __init init_console(void)
@@ -523,15 +540,12 @@ void __init init_console(void)
serial_set_rx_handler(sercon_handle, serial_rx);
/* HELLO WORLD --- start-of-day banner text. */
- printk(xen_banner());
- printk(" http://www.cl.cam.ac.uk/netos/xen\n";);
- printk(" University of Cambridge Computer Laboratory\n\n");
- printk(" Xen version %d.%d%s (%s@%s) (%s) %s\n",
+ __putstr(xen_banner());
+ printk("Xen version %d.%d%s (%s@%s) (%s) %s\n",
xen_major_version(), xen_minor_version(), xen_extra_version(),
xen_compile_by(), xen_compile_domain(),
xen_compiler(), xen_compile_date());
- printk(" Latest ChangeSet: %s\n\n", xen_changeset());
- set_printk_prefix("(XEN) ");
+ printk("Latest ChangeSet: %s\n", xen_changeset());
if ( opt_sync_console )
{
@@ -687,7 +701,7 @@ int __printk_ratelimit(int ratelimit_ms,
snprintf(lost_str, sizeof(lost_str), "%d", lost);
/* console_lock may already be acquired by printk(). */
spin_lock_recursive(&console_lock);
- __putstr(printk_prefix);
+ printk_start_of_line();
__putstr("printk: ");
__putstr(lost_str);
__putstr(" messages suppressed.\n");
diff -r 65c4977850d7 -r 2d761ca771fb xen/include/asm-ia64/time.h
--- a/xen/include/asm-ia64/time.h Thu Oct 04 14:21:11 2007 +0100
+++ b/xen/include/asm-ia64/time.h Thu Oct 04 17:58:16 2007 +0100
@@ -1,2 +1,9 @@
+#ifndef _ASM_TIME_H_
+#define _ASM_TIME_H_
+
#include <asm/linux/time.h>
#include <asm/timex.h>
+
+#define wallclock_time() ((struct tm) { 0 })
+
+#endif /* _ASM_TIME_H_ */
diff -r 65c4977850d7 -r 2d761ca771fb xen/include/asm-powerpc/time.h
--- a/xen/include/asm-powerpc/time.h Thu Oct 04 14:21:11 2007 +0100
+++ b/xen/include/asm-powerpc/time.h Thu Oct 04 17:58:16 2007 +0100
@@ -80,4 +80,7 @@ static inline u64 tb_to_ns(u64 tb)
{
return tb * (__nano(1) / timebase_freq);
}
+
+#define wallclock_time() ((struct tm) { 0 })
+
#endif
diff -r 65c4977850d7 -r 2d761ca771fb xen/include/asm-x86/time.h
--- a/xen/include/asm-x86/time.h Thu Oct 04 14:21:11 2007 +0100
+++ b/xen/include/asm-x86/time.h Thu Oct 04 17:58:16 2007 +0100
@@ -31,4 +31,7 @@ int dom0_pit_access(struct ioreq *ioreq)
int cpu_frequency_change(u64 freq);
+struct tm;
+struct tm wallclock_time(void);
+
#endif /* __X86_TIME_H__ */
diff -r 65c4977850d7 -r 2d761ca771fb xen/include/xen/console.h
--- a/xen/include/xen/console.h Thu Oct 04 14:21:11 2007 +0100
+++ b/xen/include/xen/console.h Thu Oct 04 17:58:16 2007 +0100
@@ -10,8 +10,6 @@
#include <xen/spinlock.h>
#include <xen/guest_access.h>
#include <public/xen.h>
-
-void set_printk_prefix(const char *prefix);
long read_console_ring(XEN_GUEST_HANDLE(char), u32 *, int);
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