* [PATCH] x86: mm: add_pfn_range_mapped: use meaningful index to teach clean_sort_range()
@ 2013-03-18 10:21 Lin Feng
2013-03-18 18:52 ` Yinghai Lu
0 siblings, 1 reply; 3+ messages in thread
From: Lin Feng @ 2013-03-18 10:21 UTC (permalink / raw)
To: akpm
Cc: linux-mm, x86, linux-kernel, tglx, mingo, hpa, yinghai, penberg,
jacob.shin, Lin Feng
Since add_range_with_merge() return the max none zero element of the array, it's
suffice to use it to instruct clean_sort_range() to do the sort. Or the former
assignment by add_range_with_merge() is nonsense because clean_sort_range()
will produce a accurate number of the sorted array and it never depends on
nr_pfn_mapped.
Cc: Jacob Shin <jacob.shin@amd.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Lin Feng <linfeng@cn.fujitsu.com>
---
arch/x86/mm/init.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 59b7fc4..55ae904 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -310,7 +310,7 @@ static void add_pfn_range_mapped(unsigned long start_pfn, unsigned long end_pfn)
{
nr_pfn_mapped = add_range_with_merge(pfn_mapped, E820_X_MAX,
nr_pfn_mapped, start_pfn, end_pfn);
- nr_pfn_mapped = clean_sort_range(pfn_mapped, E820_X_MAX);
+ nr_pfn_mapped = clean_sort_range(pfn_mapped, nr_pfn_mapped);
max_pfn_mapped = max(max_pfn_mapped, end_pfn);
--
1.8.0.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] x86: mm: add_pfn_range_mapped: use meaningful index to teach clean_sort_range()
2013-03-18 10:21 [PATCH] x86: mm: add_pfn_range_mapped: use meaningful index to teach clean_sort_range() Lin Feng
@ 2013-03-18 18:52 ` Yinghai Lu
2013-03-25 9:13 ` Lin Feng
0 siblings, 1 reply; 3+ messages in thread
From: Yinghai Lu @ 2013-03-18 18:52 UTC (permalink / raw)
To: Lin Feng
Cc: akpm, linux-mm, x86, linux-kernel, tglx, mingo, hpa, penberg, jacob.shin
On Mon, Mar 18, 2013 at 3:21 AM, Lin Feng <linfeng@cn.fujitsu.com> wrote:
> Since add_range_with_merge() return the max none zero element of the array, it's
> suffice to use it to instruct clean_sort_range() to do the sort. Or the former
> assignment by add_range_with_merge() is nonsense because clean_sort_range()
> will produce a accurate number of the sorted array and it never depends on
> nr_pfn_mapped.
>
> Cc: Jacob Shin <jacob.shin@amd.com>
> Cc: Yinghai Lu <yinghai@kernel.org>
> Signed-off-by: Lin Feng <linfeng@cn.fujitsu.com>
> ---
> arch/x86/mm/init.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
> index 59b7fc4..55ae904 100644
> --- a/arch/x86/mm/init.c
> +++ b/arch/x86/mm/init.c
> @@ -310,7 +310,7 @@ static void add_pfn_range_mapped(unsigned long start_pfn, unsigned long end_pfn)
> {
> nr_pfn_mapped = add_range_with_merge(pfn_mapped, E820_X_MAX,
> nr_pfn_mapped, start_pfn, end_pfn);
> - nr_pfn_mapped = clean_sort_range(pfn_mapped, E820_X_MAX);
> + nr_pfn_mapped = clean_sort_range(pfn_mapped, nr_pfn_mapped);
>
> max_pfn_mapped = max(max_pfn_mapped, end_pfn);>
Acked-by: Yinghai Lu <yinghai@kernel.org>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] x86: mm: add_pfn_range_mapped: use meaningful index to teach clean_sort_range()
2013-03-18 18:52 ` Yinghai Lu
@ 2013-03-25 9:13 ` Lin Feng
0 siblings, 0 replies; 3+ messages in thread
From: Lin Feng @ 2013-03-25 9:13 UTC (permalink / raw)
To: Yinghai Lu, akpm
Cc: linux-mm, x86, linux-kernel, tglx, mingo, hpa, penberg, jacob.shin
Hi Andrew,
On 03/19/2013 02:52 AM, Yinghai Lu wrote:
> On Mon, Mar 18, 2013 at 3:21 AM, Lin Feng <linfeng@cn.fujitsu.com> wrote:
>> Since add_range_with_merge() return the max none zero element of the array, it's
>> suffice to use it to instruct clean_sort_range() to do the sort. Or the former
>> assignment by add_range_with_merge() is nonsense because clean_sort_range()
>> will produce a accurate number of the sorted array and it never depends on
>> nr_pfn_mapped.
>>
>> Cc: Jacob Shin <jacob.shin@amd.com>
>> Cc: Yinghai Lu <yinghai@kernel.org>
>> Signed-off-by: Lin Feng <linfeng@cn.fujitsu.com>
>> ---
>> arch/x86/mm/init.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
>> index 59b7fc4..55ae904 100644
>> --- a/arch/x86/mm/init.c
>> +++ b/arch/x86/mm/init.c
>> @@ -310,7 +310,7 @@ static void add_pfn_range_mapped(unsigned long start_pfn, unsigned long end_pfn)
>> {
>> nr_pfn_mapped = add_range_with_merge(pfn_mapped, E820_X_MAX,
>> nr_pfn_mapped, start_pfn, end_pfn);
>> - nr_pfn_mapped = clean_sort_range(pfn_mapped, E820_X_MAX);
>> + nr_pfn_mapped = clean_sort_range(pfn_mapped, nr_pfn_mapped);
>>
>> max_pfn_mapped = max(max_pfn_mapped, end_pfn);>
>
> Acked-by: Yinghai Lu <yinghai@kernel.org>
Do we need to pick up this patch?
thanks,
linfeng
^ permalink raw reply [flat|nested] 3+ messages in thread
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2013-03-18 18:52 ` Yinghai Lu
2013-03-25 9:13 ` Lin Feng
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