bcachefs: Fix __bch2_truncate_page()

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__bch2_truncate_page() will mark some of the blocks in a page as
unallocated. But, if the page is mmapped (and writable), every block in
the page needs to be marked dirty, else those blocks won't be written by
__bch2_writepage().

The solution is to change those userspace mappings to RO, so that we
force bch2_page_mkwrite() to be called again.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

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Kent Overstreet 2020-10-09 00:09:20 -04:00 • committed by Kent Overstreet

parent 61ce38b862

commit 9ba2eb25f0

1 changed files with 7 additions and 0 deletions

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fs/bcachefs/fs-io.c

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