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x86/boot: Further compress CPUs bootup message

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Turn it into (for example):

[    0.073380] x86: Booting SMP configuration:
[    0.074005] .... node   #0, CPUs:          #1   #2   #3   #4   #5   #6   #7
[    0.603005] .... node   #1, CPUs:     #8   #9  #10  #11  #12  #13  #14  #15
[    1.200005] .... node   #2, CPUs:    #16  #17  #18  #19  #20  #21  #22  #23
[    1.796005] .... node   #3, CPUs:    #24  #25  #26  #27  #28  #29  #30  #31
[    2.393005] .... node   #4, CPUs:    #32  #33  #34  #35  #36  #37  #38  #39
[    2.996005] .... node   #5, CPUs:    #40  #41  #42  #43  #44  #45  #46  #47
[    3.600005] .... node   #6, CPUs:    #48  #49  #50  #51  #52  #53  #54  #55
[    4.202005] .... node   #7, CPUs:    #56  #57  #58  #59  #60  #61  #62  #63
[    4.811005] .... node   #8, CPUs:    #64  #65  #66  #67  #68  #69  #70  #71
[    5.421006] .... node   #9, CPUs:    #72  #73  #74  #75  #76  #77  #78  #79
[    6.032005] .... node  #10, CPUs:    #80  #81  #82  #83  #84  #85  #86  #87
[    6.648006] .... node  #11, CPUs:    #88  #89  #90  #91  #92  #93  #94  #95
[    7.262005] .... node  #12, CPUs:    #96  #97  #98  #99 #100 #101 #102 #103
[    7.865005] .... node  #13, CPUs:   #104 #105 #106 #107 #108 #109 #110 #111
[    8.466005] .... node  #14, CPUs:   #112 #113 #114 #115 #116 #117 #118 #119
[    9.073006] .... node  #15, CPUs:   #120 #121 #122 #123 #124 #125 #126 #127
[    9.679901] x86: Booted up 16 nodes, 128 CPUs

and drop useless elements.

Change num_digits() to hpa's division-avoiding, cell-phone-typed
version which he went at great lengths and pains to submit on a
Saturday evening.

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: huawei.libin@huawei.com
Cc: wangyijing@huawei.com
Cc: fenghua.yu@intel.com
Cc: guohanjun@huawei.com
Cc: paul.gortmaker@windriver.com
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20130930095624.GB16383@pd.tnic
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Borislav Petkov 2013-09-30 11:56:24 +02:00 committed by Ingo Molnar
parent 646e29a178
commit a17bce4d1d
3 changed files with 40 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
arch/x86/kernel/smpboot.c
View File

@ -647,22 +647,38 @@ wakeup_secondary_cpu_via_init(int phys_apicid, unsigned long start_eip)
return (send_status | accept_status);
}
void smp_announce(void)
{
int num_nodes = num_online_nodes();
printk(KERN_INFO "x86: Booted up %d node%s, %d CPUs\n",
num_nodes, (num_nodes > 1 ? "s" : ""), num_online_cpus());
}
/* reduce the number of lines printed when booting a large cpu count system */
static void announce_cpu(int cpu, int apicid)
{
static int current_node = -1;
int node = early_cpu_to_node(cpu);
static int width;
static int width, node_width;
if (!width)
width = num_digits(num_possible_cpus()) + 1; /* + '#' sign */
if (!node_width)
node_width = num_digits(num_possible_nodes()) + 1; /* + '#' */
if (cpu == 1)
printk(KERN_INFO "x86: Booting SMP configuration:\n");
if (system_state == SYSTEM_BOOTING) {
if (node != current_node) {
if (current_node > (-1))
pr_cont(" OK\n");
pr_cont("\n");
current_node = node;
pr_info("Booting Node %3d, Processors:", node);
printk(KERN_INFO ".... node %*s#%d, CPUs: ",
node_width - num_digits(node), " ", node);
}
/* Add padding for the BSP */
@ -671,8 +687,6 @@ static void announce_cpu(int cpu, int apicid)
pr_cont("%*s#%d", width - num_digits(cpu), " ", cpu);
if (cpu == num_present_cpus() - 1)
pr_cont(" OK\n");
} else
pr_info("Booting Node %d Processor %d APIC 0x%x\n",
node, cpu, apicid);

20
arch/x86/lib/misc.c
View File

@ -1,11 +1,21 @@
/*
* Count the digits of @val including a possible sign.
*
* (Typed on and submitted from hpa's mobile phone.)
*/
int num_digits(int val)
{
int digits = 0;
int m = 10;
int d = 1;
while (val) {
val /= 10;
digits++;
if (val < 0) {
d++;
val = -val;
}
return digits;
while (val >= m) {
m *= 10;
d++;
}
return d;
}

7
kernel/smp.c
View File

@ -524,6 +524,11 @@ void __init setup_nr_cpu_ids(void)
nr_cpu_ids = find_last_bit(cpumask_bits(cpu_possible_mask),NR_CPUS) + 1;
}
void __weak smp_announce(void)
{
printk(KERN_INFO "Brought up %d CPUs\n", num_online_cpus());
}
/* Called by boot processor to activate the rest. */
void __init smp_init(void)
{
@ -540,7 +545,7 @@ void __init smp_init(void)
}
/* Any cleanup work */
printk(KERN_INFO "Brought up %ld CPUs\n", (long)num_online_cpus());
smp_announce();
smp_cpus_done(setup_max_cpus);
}