BLOCK_INVALIDATEPAGE(9) The Linux VFS BLOCK_INVALIDATEPAGE(9)NAMEblock_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
DESCRIPTIONblock_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.
COPYRIGHTKernel Hackers Manual 2.6. November 2013 BLOCK_INVALIDATEPAGE(9)