Messages in this thread | | | Date | Mon, 12 Aug 2019 16:33:04 -0400 | From | Johannes Weiner <> | Subject | Re: [PATCH v10 2/7] filemap: check compound_head(page)->mapping in pagecache_get_page() |
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On Thu, Aug 01, 2019 at 11:42:39AM -0700, Song Liu wrote: > Similar to previous patch, pagecache_get_page() avoids race condition > with truncate by checking page->mapping == mapping. This does not work > for compound pages. This patch let it check compound_head(page)->mapping > instead. > > Suggested-by: Johannes Weiner <hannes@cmpxchg.org> > Signed-off-by: Song Liu <songliubraving@fb.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
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