On 06/06/2017 05:34 AM, Chris Wilson wrote: > With respect to i915, we may not be the sole owner of the page at the > point where we call shmem_read_mapping_page_gfp() as it can mmapped or > accessed directly via the mapping internally. It is just at this point > we know that the page will not be returned to the system until we have > finished using it with the GPU. > > An API that didn't assume the page was locked or require exclusive > ownership would be needed for random driver usage like i915.ko Why do you think exclusive ownership is required, btw? What does exclusive ownership mean, anyway? page_count()==1 and you old the old reference? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
