1. NAME

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

2. SYNOPSIS

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

3. ARGUMENTS

page
    the page which is affected

offset
    the index of the truncation point

4. DESCRIPTION

block_invalidatepage is called when all or part of the page has become invalidated by 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.

5. COPYRIGHT