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| /linux/fs/bcachefs/ |
| H A D | fs-io.c | diff 9ba2eb25f017800c3d00eac2bbc3c99451c3bae2 Fri Oct 09 06:09:20 CEST 2020 Kent Overstreet <kent.overstreet@gmail.com> bcachefs: Fix __bch2_truncate_page()
__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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