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| author | John David Anglin <dave.anglin@bell.net> | 2020-10-02 21:28:31 +0200 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2020-10-15 08:10:39 +0200 |
| commit | a50d3d3ce0235fdc06cdb5cc2fb082964ecb56da (patch) | |
| tree | 961ba8a234d24ef3f84557017698972515d340ac | |
| parent | parisc: Switch to more fine grained lws locks (diff) | |
| download | linux-a50d3d3ce0235fdc06cdb5cc2fb082964ecb56da.tar.xz linux-a50d3d3ce0235fdc06cdb5cc2fb082964ecb56da.zip | |
parisc: Rewrite tlb flush threshold calculation
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
| -rw-r--r-- | arch/parisc/kernel/cache.c | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c index b5e1d9f1b440..86a1a63563fd 100644 --- a/arch/parisc/kernel/cache.c +++ b/arch/parisc/kernel/cache.c @@ -383,12 +383,12 @@ EXPORT_SYMBOL(flush_kernel_icache_range_asm); static unsigned long parisc_cache_flush_threshold __ro_after_init = FLUSH_THRESHOLD; #define FLUSH_TLB_THRESHOLD (16*1024) /* 16 KiB minimum TLB threshold */ -static unsigned long parisc_tlb_flush_threshold __ro_after_init = FLUSH_TLB_THRESHOLD; +static unsigned long parisc_tlb_flush_threshold __ro_after_init = ~0UL; void __init parisc_setup_cache_timing(void) { unsigned long rangetime, alltime; - unsigned long size, start; + unsigned long size; unsigned long threshold; alltime = mfctl(16); @@ -422,14 +422,9 @@ void __init parisc_setup_cache_timing(void) goto set_tlb_threshold; } - size = 0; - start = (unsigned long) _text; + size = (unsigned long)_end - (unsigned long)_text; rangetime = mfctl(16); - while (start < (unsigned long) _end) { - flush_tlb_kernel_range(start, start + PAGE_SIZE); - start += PAGE_SIZE; - size += PAGE_SIZE; - } + flush_tlb_kernel_range((unsigned long)_text, (unsigned long)_end); rangetime = mfctl(16) - rangetime; alltime = mfctl(16); @@ -444,8 +439,11 @@ void __init parisc_setup_cache_timing(void) threshold/1024); set_tlb_threshold: - if (threshold > parisc_tlb_flush_threshold) + if (threshold > FLUSH_TLB_THRESHOLD) parisc_tlb_flush_threshold = threshold; + else + parisc_tlb_flush_threshold = FLUSH_TLB_THRESHOLD; + printk(KERN_INFO "TLB flush threshold set to %lu KiB\n", parisc_tlb_flush_threshold/1024); } |