On Fri, Jun 19, 2020 at 02:56:41PM -0700, Ralph Campbell wrote: > The SVM page fault handler groups faults into a range of contiguous > virtual addresses and requests hmm_range_fault() to populate and > return the page frame number of system memory mapped by the CPU. > In preparation for supporting large pages to be mapped by the GPU, > process faults one page at a time. In addition, use the hmm_range > default_flags to fix a corner case where the input hmm_pfns array > is not reinitialized after hmm_range_fault() returns -EBUSY and must > be called again. Are you sure? hmm_range_fault is pretty expensive per call.. Jason
