On 2015/12/17 10:53, Kamezawa Hiroyuki wrote: > 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" ? No, it's zone_names[MAX_NR_ZONES] How about "Movable", -> "Non-mirrored"? > > BTW, let me confirm. > > ZONE_NORMAL = mirrored > ZONE_MOVABLE = not mirrored. > Yes, > 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. > If the mirrored memory is small and the other is large, I think we can both enable "non-mirrored -> normal" and "normal -> non-mirrored". Thanks, Xishi Qiu > 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>