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-rw-r--r--arch/parisc/kernel/cache.c18
1 files changed, 10 insertions, 8 deletions
diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c
index bddd2acebdcc..9f1c29d06574 100644
--- a/arch/parisc/kernel/cache.c
+++ b/arch/parisc/kernel/cache.c
@@ -364,7 +364,7 @@ EXPORT_SYMBOL(flush_kernel_icache_range_asm);
#define FLUSH_THRESHOLD 0x80000 /* 0.5MB */
static unsigned long parisc_cache_flush_threshold __read_mostly = FLUSH_THRESHOLD;
-#define FLUSH_TLB_THRESHOLD (2*1024*1024) /* 2MB initial TLB threshold */
+#define FLUSH_TLB_THRESHOLD (16*1024) /* 16 KiB minimum TLB threshold */
static unsigned long parisc_tlb_flush_threshold __read_mostly = FLUSH_TLB_THRESHOLD;
void __init parisc_setup_cache_timing(void)
@@ -404,10 +404,6 @@ void __init parisc_setup_cache_timing(void)
goto set_tlb_threshold;
}
- alltime = mfctl(16);
- flush_tlb_all();
- alltime = mfctl(16) - alltime;
-
size = 0;
start = (unsigned long) _text;
rangetime = mfctl(16);
@@ -418,13 +414,19 @@ void __init parisc_setup_cache_timing(void)
}
rangetime = mfctl(16) - rangetime;
- printk(KERN_DEBUG "Whole TLB flush %lu cycles, flushing %lu bytes %lu cycles\n",
+ alltime = mfctl(16);
+ flush_tlb_all();
+ alltime = mfctl(16) - alltime;
+
+ printk(KERN_INFO "Whole TLB flush %lu cycles, Range flush %lu bytes %lu cycles\n",
alltime, size, rangetime);
- threshold = PAGE_ALIGN(num_online_cpus() * size * alltime / rangetime);
+ threshold = PAGE_ALIGN((num_online_cpus() * size * alltime) / rangetime);
+ printk(KERN_INFO "Calculated TLB flush threshold %lu KiB\n",
+ threshold/1024);
set_tlb_threshold:
- if (threshold)
+ if (threshold > parisc_tlb_flush_threshold)
parisc_tlb_flush_threshold = threshold;
printk(KERN_INFO "TLB flush threshold set to %lu KiB\n",
parisc_tlb_flush_threshold/1024);