1BLOCK_INVALIDATEPAGE(9)          The Linux VFS         BLOCK_INVALIDATEPAGE(9)
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NAME

6       block_invalidatepage - invalidate part or all of a buffer-backed page
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SYNOPSIS

9       void block_invalidatepage(struct page * page, unsigned long offset);
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ARGUMENTS

12       page
13           the page which is affected
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15       offset
16           the index of the truncation point
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DESCRIPTION

19       block_invalidatepage is called when all or part of the page has become
20       invalidated by a truncate operation.
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22       block_invalidatepage does not have to release all buffers, but it must
23       ensure that no dirty buffer is left outside offset and that no I/O is
24       underway against any of the blocks which are outside the truncation
25       point. Because the caller is about to free (and possibly reuse) those
26       blocks on-disk.
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29Kernel Hackers Manual 3.10         June 2019           BLOCK_INVALIDATEPAGE(9)
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