> Since truncate_inode_page() can sleep if the page is under I/O, then
> shrink_mmap may recycle the page from the page cache while truncate is
> sleeping. This patch will fix the race.
this should not happen, because when we do the lock_page() we have done a
get_page() - so shrink_mmap() cannot possibly do a remove_inode_page().
if it does then it's a shrink_mmap() bug. Can you see this happen in the
original kernel tree as well?
-- mingo
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