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.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                   BLOCK_INVALIDATEPAGE(9)