On 12/15/2021 7:25 PM, Matthew Wilcox wrote: > On Wed, Dec 15, 2021 at 05:53:39PM +0530, Charan Teja Reddy wrote: >> The documentation of isolate_lru_page() says that, "it must be called >> with an elevated refcount on the page", which is not followed while >> isolating pages in process_madvise() system call with advise >> MADV_PAGEOUT. Fix it. > > We hold the mmap_lock over the call to this function, so the reference > to the page from the page tables cannot go away. There's no need to > grab an extra reference here. Thanks Matthew for clearing such fundamentals. >
