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SubjectRe: [PATCHv2, RFC 08/30] thp, mm: rewrite add_to_page_cache_locked() to support huge pages
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On Fri, Mar 15, 2013 at 9:23 PM, Kirill A. Shutemov
<kirill.shutemov@linux.intel.com> wrote:
> Hillf Danton wrote:
>> On Fri, Mar 15, 2013 at 1:50 AM, Kirill A. Shutemov
>> <kirill.shutemov@linux.intel.com> wrote:
>> > + page_cache_get(page);
>> > + spin_lock_irq(&mapping->tree_lock);
>> > + page->mapping = mapping;
>> > + page->index = offset;
>> > + error = radix_tree_insert(&mapping->page_tree, offset, page);
>> > + if (unlikely(error))
>> > + goto err;
>> > + if (PageTransHuge(page)) {
>> > + int i;
>> > + for (i = 1; i < HPAGE_CACHE_NR; i++) {
>> struct page *tail = page + i; to easy reader
>>
>> > + page_cache_get(page + i);
>> s/page_cache_get/get_page_foll/ ?
>
> Why?
>
see follow_trans_huge_pmd() please.


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