block_invalidatepage man page on Oracle

block_invalidatepage man page on Oracle

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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 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
       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 3.8.	   June 2014	       BLOCK_INVALIDATEPAGE(9)

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