Am Dienstag, 25. Dezember 2018, 03:42:37 CET schrieb zhangjun: > Hello,richard > > > Before fully understanding this regression, in order to fix the bug of > cma_alloc(), > submit a conservative patch that modifies count in iomap_migrate_page(). > Can you consider merging first? No. There is no need to rush. As it looks like the iomap regression is trivial, Christoph pointed out that a case was forgotten. But Dave is currently (like almost all of us) on vacation to confirm. Thanks, //richard