commit 5fdb322ff2c2b4ad519f490dcb7ebb96c5439af7
Author: Daeho Jeong <daehojeong@xxxxxxxxxx>
Date: Thu Dec 3 15:56:15 2020 +0900
f2fs: add F2FS_IOC_DECOMPRESS_FILE and F2FS_IOC_COMPRESS_FILE
+ page_cache_ra_unbounded(&ractl, len, 0);
/**
* page_cache_ra_unbounded - Start unchecked readahead.
* @ractl: Readahead control.
* @nr_to_read: The number of pages to read.
* @lookahead_size: Where to start the next readahead.
*
* This function is for filesystems to call when they want to start
* readahead beyond a file's stated i_size. This is almost certainly
* not the function you want to call. Use page_cache_async_readahead()
* or page_cache_sync_readahead() instead.
*
* Context: File is referenced by caller. Mutexes may be held by caller.
* May sleep, but will not reenter filesystem to reclaim memory.
*/
Why?
