linux-kernel - Re: [PATCH RFC 1/2] mm: meminit: initialise more memory for inode/dentry hash tables in early boot

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Message-ID: <CAD8of+rxkV85H5RDyzLZowkxUhJxgVuMt7-hjwP1yxYZCNsqUg@mail.gmail.com>
Date:	Fri, 4 Mar 2016 21:52:53 +0800
From:	Li Zhang <zhlcindy@...il.com>
To:	Vlastimil Babka <vbabka@...e.cz>
Cc:	mpe@...erman.id.au,
	Anshuman Khandual <khandual@...ux.vnet.ibm.com>,
	aneesh.kumar@...ux.vnet.ibm.com, mgorman@...hsingularity.net,
	linuxppc-dev@...ts.ozlabs.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Li Zhang <zhlcindy@...ux.vnet.ibm.com>
Subject: Re: [PATCH RFC 1/2] mm: meminit: initialise more memory for
 inode/dentry hash tables in early boot

On Fri, Mar 4, 2016 at 4:48 PM, Vlastimil Babka <vbabka@...e.cz> wrote:
> On 03/03/2016 08:01 AM, Li Zhang wrote:
>> --- a/mm/page_alloc.c
>> +++ b/mm/page_alloc.c
>> @@ -293,13 +293,20 @@ static inline bool update_defer_init(pg_data_t *pgdat,
>>                               unsigned long pfn, unsigned long zone_end,
>>                               unsigned long *nr_initialised)
>>  {
>> +     unsigned long max_initialise;
>> +
>>       /* Always populate low zones for address-contrained allocations */
>>       if (zone_end < pgdat_end_pfn(pgdat))
>>               return true;
>> +     /*
>> +     * Initialise at least 2G of a node but also take into account that
>> +     * two large system hashes that can take up 1GB for 0.25TB/node.
>> +     */
>
> The indentation is wrong here.

Thanks for reviewing, I will fix it in next version.

>
>> +     max_initialise = max(2UL << (30 - PAGE_SHIFT),
>> +             (pgdat->node_spanned_pages >> 8));
>>
>> -     /* Initialise at least 2G of the highest zone */
>>       (*nr_initialised)++;
>> -     if (*nr_initialised > (2UL << (30 - PAGE_SHIFT)) &&
>> +     if ((*nr_initialised > max_initialise) &&
>>           (pfn & (PAGES_PER_SECTION - 1)) == 0) {
>>               pgdat->first_deferred_pfn = pfn;
>>               return false;
>>
>



-- 

Best Regards
-Li