suse man page for vmtruncate

VMTRUNCATE(9)						    Memory Management in Linux						     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.

COPYRIGHT
Kernel Hackers Manual 2.6.					     July 2010							     VMTRUNCATE(9)