Rechercher une page de manuel
page_cache_sync_readahead
Langue: en
Version: June 2009 (debian - 07/07/09)
Section: 9 (Appels noyau Linux)
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
mapping
- address_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
Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre