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author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2022-03-31 15:27:09 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-08 15:24:09 +0300 |
commit | 7aae60df6782971606567ed4f23239390cfdf0a7 (patch) | |
tree | 35f6447d2b43eceb41a1e5e67b3c8237a43849be /scripts | |
parent | be8ebbabac944f01f6fabb026df060ca84c69d3c (diff) | |
download | linux-7aae60df6782971606567ed4f23239390cfdf0a7.tar.xz |
XArray: Update the LRU list in xas_split()
commit 3ed4bb77156da0bc732847c8c9df92454c1fbeea upstream.
When splitting a value entry, we may need to add the new nodes to the LRU
list and remove the parent node from the LRU list. The WARN_ON checks
in shadow_lru_isolate() catch this oversight. This bug was latent
until we stopped splitting folios in shrink_page_list() with commit
820c4e2e6f51 ("mm/vmscan: Free non-shmem folios without splitting them").
That allows the creation of large shadow entries, and subsequently when
trying to page in a small page, we will split the large shadow entry
in __filemap_add_folio().
Fixes: 8fc75643c5e1 ("XArray: add xas_split")
Reported-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'scripts')
0 files changed, 0 insertions, 0 deletions