author | Florian Westphal <fw@strlen.de> |
Thu, 09 Apr 2009 12:07:21 +0200 | |
changeset 2 | d1f6d8b6f81c |
parent 0 | aa628870c1d3 |
permissions | -rw-r--r-- |
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Port of Linux 2.6.28 for use with network simulation cradle.
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/* |
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* include/linux/pagevec.h |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* |
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* In many places it is efficient to batch an operation up against multiple |
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* pages. A pagevec is a multipage container which is used for that. |
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*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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#ifndef _LINUX_PAGEVEC_H |
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#define _LINUX_PAGEVEC_H |
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|
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/* 14 pointers + two long's align the pagevec structure to a power of two */ |
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#define PAGEVEC_SIZE 14 |
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|
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struct page; |
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struct address_space; |
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|
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struct pagevec { |
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unsigned long nr; |
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unsigned long cold; |
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struct page *pages[PAGEVEC_SIZE]; |
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}; |
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|
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void __pagevec_release(struct pagevec *pvec); |
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void __pagevec_free(struct pagevec *pvec); |
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void ____pagevec_lru_add(struct pagevec *pvec, enum lru_list lru); |
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void pagevec_strip(struct pagevec *pvec); |
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void pagevec_swap_free(struct pagevec *pvec); |
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unsigned pagevec_lookup(struct pagevec *pvec, struct address_space *mapping, |
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pgoff_t start, unsigned nr_pages); |
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unsigned pagevec_lookup_tag(struct pagevec *pvec, |
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struct address_space *mapping, pgoff_t *index, int tag, |
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unsigned nr_pages); |
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|
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static inline void pagevec_init(struct pagevec *pvec, int cold) |
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{ |
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pvec->nr = 0; |
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pvec->cold = cold; |
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} |
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static inline void pagevec_reinit(struct pagevec *pvec) |
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{ |
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pvec->nr = 0; |
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} |
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|
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static inline unsigned pagevec_count(struct pagevec *pvec) |
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{ |
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return pvec->nr; |
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} |
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|
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static inline unsigned pagevec_space(struct pagevec *pvec) |
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{ |
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return PAGEVEC_SIZE - pvec->nr; |
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} |
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|
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/* |
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* Add a page to a pagevec. Returns the number of slots still available. |
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*/ |
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static inline unsigned pagevec_add(struct pagevec *pvec, struct page *page) |
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{ |
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pvec->pages[pvec->nr++] = page; |
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return pagevec_space(pvec); |
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} |
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static inline void pagevec_release(struct pagevec *pvec) |
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{ |
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if (pagevec_count(pvec)) |
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__pagevec_release(pvec); |
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} |
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static inline void pagevec_free(struct pagevec *pvec) |
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{ |
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if (pagevec_count(pvec)) |
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__pagevec_free(pvec); |
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} |
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static inline void __pagevec_lru_add_anon(struct pagevec *pvec) |
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{ |
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____pagevec_lru_add(pvec, LRU_INACTIVE_ANON); |
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} |
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static inline void __pagevec_lru_add_active_anon(struct pagevec *pvec) |
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{ |
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____pagevec_lru_add(pvec, LRU_ACTIVE_ANON); |
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} |
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static inline void __pagevec_lru_add_file(struct pagevec *pvec) |
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{ |
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____pagevec_lru_add(pvec, LRU_INACTIVE_FILE); |
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} |
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static inline void __pagevec_lru_add_active_file(struct pagevec *pvec) |
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{ |
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____pagevec_lru_add(pvec, LRU_ACTIVE_FILE); |
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} |
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static inline void pagevec_lru_add_file(struct pagevec *pvec) |
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{ |
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if (pagevec_count(pvec)) |
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__pagevec_lru_add_file(pvec); |
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} |
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|
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static inline void pagevec_lru_add_anon(struct pagevec *pvec) |
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{ |
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if (pagevec_count(pvec)) |
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__pagevec_lru_add_anon(pvec); |
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} |
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#endif /* _LINUX_PAGEVEC_H */ |