memory_failure_dev_pagemap() at the moment assumes base pages (e.g. dax_lock_page()). For pagemap with compound pages fetch the compound_head in case we are handling a tail page memory failure. Currently this is a nop, but in the advent of compound pages in dev_pagemap it allows memory_failure_dev_pagemap() to keep working. Reported-by: Jane Chu <jane.chu@xxxxxxxxxx> Signed-off-by: Joao Martins <joao.m.martins@xxxxxxxxxx> --- mm/memory-failure.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 24210c9bd843..94240d772623 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1318,6 +1318,8 @@ static int memory_failure_dev_pagemap(unsigned long pfn, int flags, goto out; } + page = compound_head(page); + /* * Prevent the inode from being freed while we are interrogating * the address_space, typically this would be handled by -- 2.17.1
