On 06/13/2017 07:03 AM, Noam Camus wrote:
> From: Noam Camus <noamca at mellanox.com>
>
> The reasons are:
> 1) speeding up boot time, becomes critical for many CPUs machine,
> e.g. NPS400 with 4K CPUs
> 2) shorten kernel log at boot time, again easy to scan for large
> scale machines such NPS400
>
> Signed-off-by: Noam Camus <noamca at mellanox.com>
> ---
> arch/arc/kernel/setup.c | 6 +++---
> arch/arc/kernel/smp.c | 4 ++--
> arch/arc/mm/cache.c | 2 +-
> arch/arc/mm/tlb.c | 2 +-
> 4 files changed, 7 insertions(+), 7 deletions(-)
>
> diff --git a/arch/arc/kernel/setup.c b/arch/arc/kernel/setup.c
> index fc8211f..8494b31 100644
> --- a/arch/arc/kernel/setup.c
> +++ b/arch/arc/kernel/setup.c
> @@ -385,13 +385,13 @@ void setup_processor(void)
> read_arc_build_cfg_regs();
> arc_init_IRQ();
>
> - printk(arc_cpu_mumbojumbo(cpu_id, str, sizeof(str)));
> + pr_debug("%s", arc_cpu_mumbojumbo(cpu_id, str, sizeof(str)));
I understand you issue, but as Alexey mentioned before we can't switch the normal
kernel boot log to debug only.
At best you can convert the current printk to pr_info and then set the log level
in your cmdline to something higher than info !
>
> arc_mmu_init();
> arc_cache_init();
>
> - printk(arc_extn_mumbojumbo(cpu_id, str, sizeof(str)));
> - printk(arc_platform_smp_cpuinfo());
> + pr_debug("%s", arc_extn_mumbojumbo(cpu_id, str, sizeof(str)));
> + pr_debug("%s", arc_platform_smp_cpuinfo());
>
> arc_chk_core_config();
> }
> diff --git a/arch/arc/kernel/smp.c b/arch/arc/kernel/smp.c
> index f462671..d1aa917 100644
> --- a/arch/arc/kernel/smp.c
> +++ b/arch/arc/kernel/smp.c
> @@ -177,8 +177,8 @@ int __cpu_up(unsigned int cpu, struct task_struct *idle)
>
> secondary_idle_tsk = idle;
>
> - pr_info("Idle Task [%d] %p", cpu, idle);
> - pr_info("Trying to bring up CPU%u ...\n", cpu);
> + pr_debug("Idle Task [%d] %p", cpu, idle);
> + pr_debug("Trying to bring up CPU%u ...\n", cpu);
>
> if (plat_smp_ops.cpu_kick)
> plat_smp_ops.cpu_kick(cpu,
> diff --git a/arch/arc/mm/cache.c b/arch/arc/mm/cache.c
> index a867575..7d3e79b 100644
> --- a/arch/arc/mm/cache.c
> +++ b/arch/arc/mm/cache.c
> @@ -1188,7 +1188,7 @@ void __ref arc_cache_init(void)
> unsigned int __maybe_unused cpu = smp_processor_id();
> char str[256];
>
> - printk(arc_cache_mumbojumbo(0, str, sizeof(str)));
> + pr_debug("%s", arc_cache_mumbojumbo(0, str, sizeof(str)));
>
> /*
> * Only master CPU needs to execute rest of function:
> diff --git a/arch/arc/mm/tlb.c b/arch/arc/mm/tlb.c
> index d0126fd..c5e70d8 100644
> --- a/arch/arc/mm/tlb.c
> +++ b/arch/arc/mm/tlb.c
> @@ -814,7 +814,7 @@ void arc_mmu_init(void)
> char str[256];
> struct cpuinfo_arc_mmu *mmu = &cpuinfo_arc700[smp_processor_id()].mmu;
>
> - printk(arc_mmu_mumbojumbo(0, str, sizeof(str)));
> + pr_debug("%s", arc_mmu_mumbojumbo(0, str, sizeof(str)));
>
> /*
> * Can't be done in processor.h due to header include depenedencies
>
