1READ_CACHE_PAGE_ASYN(9)   Memory Management in Linux   READ_CACHE_PAGE_ASYN(9)
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NAME

6       read_cache_page_async - read into page cache, fill it if needed
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SYNOPSIS

9       struct page * read_cache_page_async(struct address_space * mapping,
10                                           pgoff_t index,
11                                           int (*filler) (void *, struct page *),
12                                           void * data);
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ARGUMENTS

15       mapping
16           the page's address_space
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18       index
19           the page index
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21       filler
22           function to perform the read
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24       data
25           first arg to filler(data, page) function, often left as NULL
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DESCRIPTION

28       Same as read_cache_page, but don't wait for page to become unlocked
29       after submitting it to the filler.
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31       Read into the page cache. If a page already exists, and PageUptodate is
32       not set, try to fill the page but don't wait for it to become unlocked.
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34       If the page does not get brought uptodate, return -EIO.
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37Kernel Hackers Manual 3.10         June 2019           READ_CACHE_PAGE_ASYN(9)
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