On 12/29/2017 09:58 AM, Xishi Qiu wrote: > When calling vfree(), it calls unmap_vmap_area() to clear page table, > but do not free the memory of page table, why? just for performance? I guess it's expected that the free virtual range and associated page tables it might be reused later. > If a driver use vmalloc() and vfree() frequently, we will lost much > page table memory, maybe oom later. If it's reused, then not really. Did you notice an actual issue, or is this just theoretical concern. > Thanks, > Xishi Qiu > -- 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>
