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- jessie 3.16.56-1+deb8u1
PAGE_CACHE_SYNC_READ(9) | Memory Management in Linux | PAGE_CACHE_SYNC_READ(9) |
NAME¶
page_cache_sync_readahead - generic file readaheadSYNOPSIS¶
void
page_cache_sync_readahead(struct address_space * mapping,
struct file_ra_state * ra,
struct file * filp,
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
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_sync_readahead should be called when a cache miss happened: it will submit the read. The readahead logic may decide to piggyback more pages onto the read request if access patterns suggest it will improve performance.COPYRIGHT¶
May 2018 | Kernel Hackers Manual 3.16 |