truncate_pagecache_range9
Unmap and remove pagecache that is hole-punched
Usage
void truncate_pagecache_range(struct inode * inode, loff_t lstart, loff_t lend);
Arguments
inode
inode
lstart
offset of beginning of hole
lend
offset of last byte of hole
Overview
This function should typically be called before the filesystem releases resources associated with the freed range (eg. deallocates blocks). This way, pagecache will always stay logically coherent with on-disk format, and the filesystem would not have to deal with situations such as writepage being called for a page that has already had its underlying blocks deallocated.
Releases
2 releases since Debian 8 (Jessie); the text changed 1 time.