At 11/28/2012 12:01 PM, Jiang Liu Wrote: > On 2012-11-28 11:47, Tang Chen wrote: >> On 11/27/2012 11:10 AM, wujianguo wrote: >>> >>> Hi Tang, >>> DMA address can't be set as movable, if some one boot kernel with >>> movablecore_map=4G@0xa00000 or other memory region that contains DMA address, >>> system maybe boot failed. Should this case be handled or mentioned >>> in the change log and kernel-parameters.txt? >> >> Hi Wu, >> >> I think we can use MAX_DMA_PFN and MAX_DMA32_PFN to prevent setting DMA >> address as movable. Just ignore the address lower than them, and set >> the rest as movable. How do you think ? >> >> And, since we cannot figure out the minimum of memory kernel needs, I >> think for now, we can just add some warning into kernel-parameters.txt. >> >> Thanks. :) > On one other OS, there is a mechanism to dynamically convert pages from > movable zones into normal zones. The OS auto does it? Or the user coverts it? We can convert pages from movable zones into normal zones by the following interface: echo online_kernel >/sys/devices/system/memory/memoryX/state We have posted a patchset to implement it, and it is in mm tree now. Thanks Wen Congyang > > Regards! > Gerry > >> >>> >>> Thanks, >>> Jianguo Wu >>> >> >> . >> > > > -- 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>