On 2/12/2018 1:33 PM, Jean-Philippe Brucker wrote: > +static void io_mm_detach_all_locked(struct iommu_bond *bond) > +{ > + while (!io_mm_detach_locked(bond)); > +} > + I don't remember if I mentioned this before or not but I think this loop needs a little bit relaxation with yield and maybe an informational message with might help if wait exceeds some time. -- Sinan Kaya Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc. Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.