Hi Simon, Bootmem allocator is used to managed DMA and Normal memory only, and it does not manage highmem pages because kernel can't directly access highmem pages. Regards! Gerry On 02/28/2013 02:13 PM, Simon Jeons wrote: > Hi Jiang, > > https://patchwork.kernel.org/patch/1781291/ > > You said that the bootmem allocator doesn't touch *highmem pages*, so highmem zones' managed_pages is set to the accurate value "spanned_pages - absent_pages" in function free_area_init_core() and won't be updated anymore. Why it doesn't touch *highmem pages*? Could you point out where you figure out this? > -- 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>