I thought it related to CMA but seems not. Have you ever run any data integrity test? On Fri, Sep 25, 2015 at 1:07 PM, Richard Weinberger <richard at nod.at> wrote: > Am 23.09.2015 um 20:21 schrieb Han Xu: >> Have you enabled the CONFIG_CMA in kernel setting? > > CMA or DMA? :) > > Thanks, > //richard