BLOCK_INVALIDATEPAGE

Section: The Linux VFS (9)
Updated: February 2011
Index Return to Main Contents
 

NAME

block_invalidatepage - invalidate part of all of a buffer-backed page  

SYNOPSIS

void block_invalidatepage(struct page * page, unsigned long offset);
 

ARGUMENTS

page

the page which is affected

offset

the index of the truncation point
 

DESCRIPTION

block_invalidatepage is called when all or part of the page has become invalidatedby a truncate operation.

block_invalidatepage does not have to release all buffers, but it must ensure that no dirty buffer is left outside offset and that no I/O is underway against any of the blocks which are outside the truncation point. Because the caller is about to free (and possibly reuse) those blocks on-disk.  

COPYRIGHT