table of contents
| PAGE_CACHE_ASYNC_REA(9) | Memory Management in Linux | PAGE_CACHE_ASYNC_REA(9) |
NAME¶
page_cache_async_readahead - file readahead for marked pages
SYNOPSIS¶
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¶
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
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¶
| June 2024 | Kernel Hackers Manual 3.10 |