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Date:   Thu, 30 Aug 2018 20:20:08 +0000
From:   Pasha Tatashin <Pavel.Tatashin@...rosoft.com>
To:     David Hildenbrand <david@...hat.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     "linux-mm@...ck.org" <linux-mm@...ck.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...e.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Pavel Tatashin <pasha.tatashin@...cle.com>,
        Kemi Wang <kemi.wang@...el.com>,
        David Rientjes <rientjes@...gle.com>,
        Jia He <jia.he@...-semitech.com>,
        Oscar Salvador <osalvador@...e.de>,
        Petr Tesarik <ptesarik@...e.com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Mathieu Malaterre <malat@...ian.org>,
        Baoquan He <bhe@...hat.com>,
        Wei Yang <richard.weiyang@...il.com>,
        Ross Zwisler <zwisler@...nel.org>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: Re: [PATCH v1 1/5] mm/memory_hotplug: drop intermediate
 __offline_pages



On 8/30/18 4:17 PM, Pasha Tatashin wrote:
> I guess the wrap was done because of __ref, but no reason to have this
> wrap. So looks good to me.
> 
> Reviewed-by: Pavel Tatashin <pavel.tatashin@...rosoft.com>>
> On 8/16/18 6:06 AM, David Hildenbrand wrote:
>> Let's avoid this indirection and just call the function offline_pages().
>>
>> Signed-off-by: David Hildenbrand <david@...hat.com>
>> ---
>>  mm/memory_hotplug.c | 13 +++----------
>>  1 file changed, 3 insertions(+), 10 deletions(-)
>>
>> diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
>> index 6a2726920ed2..090cf474de87 100644
>> --- a/mm/memory_hotplug.c
>> +++ b/mm/memory_hotplug.c
>> @@ -1589,10 +1589,10 @@ static void node_states_clear_node(int node, struct memory_notify *arg)
>>  		node_clear_state(node, N_MEMORY);
>>  }
>>  
>> -static int __ref __offline_pages(unsigned long start_pfn,
>> -		  unsigned long end_pfn)
>> +/* Must be protected by mem_hotplug_begin() or a device_lock */
>> +int offline_pages(unsigned long start_pfn, unsigned long nr_pages)
      ^^^
I meant to say keep the __ref, otherwise looks good.

Thank you,
Pavel

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