On Sun 18-03-18 10:22:49, Tetsuo Handa wrote: > >From f43b8ca61b76f9a19c13f6bf42b27fad9554afc0 Mon Sep 17 00:00:00 2001 > From: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx> > Date: Sun, 18 Mar 2018 10:18:01 +0900 > Subject: [PATCH v2] mm: Warn on lock_page() from reclaim context. > > Kirill A. Shutemov noticed that calling lock_page[_killable]() from > reclaim context might cause deadlock. In order to help finding such > lock_page[_killable]() users (including out of tree users), this patch > emits warning messages when CONFIG_PROVE_LOCKING is enabled. So how do you ensure that this won't cause false possitives? E.g. do we ever allocate while holding the page lock and not having the page on the LRU list? -- Michal Hocko SUSE Labs
