table of contents
| TRUNCATE_PAGECACHE_R(9) | Memory Management in Linux | TRUNCATE_PAGECACHE_R(9) |
NAME¶
truncate_pagecache_range - unmap and remove pagecache that is hole-punched
SYNOPSIS¶
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
DESCRIPTION¶
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.
COPYRIGHT¶
| May 2024 | Kernel Hackers Manual 2.6. |