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PAGE_CACHE_ASYNC_REA(9) | Memory Management in Linux | PAGE_CACHE_ASYNC_REA(9) |
NAME¶
page_cache_async_readahead - file readahead for marked pagesSYNOPSIS¶
void
page_cache_async_readahead(struct address_space * mapping,
struct file_ra_state * ra,
struct file * filp,
struct page * page,
pgoff_t offset,
unsigned long req_size);
ARGUMENTS¶
mappingaddress_space which holds the pagecache and I/O
vectors
ra
file_ra_state which holds the readahead state
filp
passed on to ->readpage and ->
readpages
page
the page at offset which has the PG_readahead flag
set
offset
start offset into mapping, in pagecache page-sized
units
req_size
hint: total size of the read which the caller is
performing in pagecache pages
DESCRIPTION¶
page_cache_async_readahead should be called when a page is used which has the PG_readahead flag; this is a marker to suggest that the application has used up enough of the readahead window that we should start pulling in more pages.COPYRIGHT¶
January 2017 | Kernel Hackers Manual 4.8. |