Re: [RESEND PATCH v10 3/6] mm: page_alloc: reduce unnecessary binary search in memblock_next_valid_pfn()

[Pasha Tatashin]

On 8/16/18 9:08 PM, Pavel Tatashin wrote:
> 
>> Signed-off-by: Jia He <jia.he@xxxxxxxxxxxxxxxx>
>> ---
>>  mm/memblock.c | 37 +++++++++++++++++++++++++++++--------
>>  1 file changed, 29 insertions(+), 8 deletions(-)
>>
>> diff --git a/mm/memblock.c b/mm/memblock.c
>> index ccad225..84f7fa7 100644
>> --- a/mm/memblock.c
>> +++ b/mm/memblock.c
>> @@ -1140,31 +1140,52 @@ int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size,
>>  #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
>>  
>>  #ifdef CONFIG_HAVE_MEMBLOCK_PFN_VALID
>> +static int early_region_idx __init_memblock = -1;
> 
> One comment:
> 
> This should be __initdata, but even better bring it inside the function
> as local static variable.

Disregard this comment, this global is used in the next commits. So,
everything is OK. No need for __initdata either.

> 
>>  ulong __init_memblock memblock_next_valid_pfn(ulong pfn)
>>  {
> 
> Otherwise looks good:
> 
> Reviewed-by: Pavel Tatashin <pavel.tatashin@xxxxxxxxxxxxx>
> 
>