vmtruncate(9)
NAME
vmtruncate - unmap mappings freed by truncate syscall
SYNOPSIS
int vmtruncate(struct inode * inode, loff_t offset);
ARGUMENTS
- inode
- inode of the file used
- offset
- file offset to start truncating
DESCRIPTION
NOTE! We have to be ready to update the memory sharing between the file
and the memory map for a potential last incomplete page. Ugly, but
necessary.