BLOCK_INVALIDATEPAGE(9) The Linux VFS BLOCK_INVALIDATEPAGE(9)NAME
block_invalidatepage - invalidate part or all of a buffer-backed page
SYNOPSIS
void block_invalidatepage(struct page * page, unsigned int offset,
unsigned int length);
ARGUMENTS
page
the page which is affected
offset
start of the range to invalidate
length
length of the range to invalidate
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.
COPYRIGHTKernel Hackers Manual 3.11 November 2013 BLOCK_INVALIDATEPAGE(9)