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 Kernel Hackers Manual 2.6. January 2013 BLOCK_INVALIDATEPAGE(9)