On 2015/12/17 11:47, Xishi Qiu wrote: > On 2015/12/17 9:38, Izumi, Taku wrote: > >> Dear Xishi, >> >> Sorry for late. >> >>> -----Original Message----- >>> From: Xishi Qiu [mailto:qiuxishi@xxxxxxxxxx] >>> Sent: Friday, December 11, 2015 6:44 PM >>> To: Izumi, Taku/泉 拓 >>> Cc: Luck, Tony; linux-kernel@xxxxxxxxxxxxxxx; linux-mm@xxxxxxxxx; akpm@xxxxxxxxxxxxxxxxxxxx; Kamezawa, Hiroyuki/亀澤 寛 >>> 之; mel@xxxxxxxxx; Hansen, Dave; matt@xxxxxxxxxxxxxxxxxxx >>> Subject: Re: [PATCH v3 2/2] mm: Introduce kernelcore=mirror option >>> >>> On 2015/12/11 13:53, Izumi, Taku wrote: >>> >>>> Dear Xishi, >>>> >>>>> Hi Taku, >>>>> >>>>> Whether it is possible that we rewrite the fallback function in buddy system >>>>> when zone_movable and mirrored_kernelcore are both enabled? >>>> >>>> What does "when zone_movable and mirrored_kernelcore are both enabled?" mean ? >>>> >>>> My patchset just provides a new way to create ZONE_MOVABLE. >>>> >>> >>> Hi Taku, >>> > > Hi Taku, > > We can NOT specify kernelcore= "nn[KMG]" and "mirror" at the same time. > So when we use "mirror", in fact, the movable zone is a new zone. I think it is > more appropriate with this name "mirrored zone", and also we can rewrite the > fallback function in buddy system in this case. kernelcore ="mirrored zone" ? BTW, let me confirm. ZONE_NORMAL = mirrored ZONE_MOVABLE = not mirrored. so, the new zone is "not-mirrored" zone. Now, fallback function is movable -> normal -> DMA. As Tony requested, we may need a knob to stop a fallback in "movable->normal", later. Thanks, -Kame -- 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>