Messages in this thread | | | Date | Mon, 20 Oct 2014 09:58:10 +0800 | Subject | Re: [PATCH v2] arm64: mm: use macro instead of if judgement of ZONE_DMA | From | Yifan Zhang <> |
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Catalin,
No, we don't have any issues w/ current configuration. I'm just confused why normal zone is empty in arm64 when I dumped zone info. If it is on purpose, then I'm fine.
THX all for feedback!
BR, Yifan
On Fri, Oct 17, 2014 at 9:28 PM, Catalin Marinas <catalin.marinas@arm.com> wrote: > On Fri, Oct 17, 2014 at 04:08:43AM +0100, Yifan Zhang wrote: >> I found In current arm64 code, there is no normal zone, only DMA zone. >> >> Number of blocks type Unmovable Reclaimable Movable >> Reserve CMA Isolate >> >> Node 0, zone DMA 142 12 69 >> 1 28 0 >> >> When zone_sizes_init, zone_size[ZONE_NORMAL] is initialized to 0. (it >> is 3.10, I didn't try the latest code base) > [...] >> Is this ZONE_DMA cover full memory and ZONE_NORMAL = 0 strategy on >> purpose ? We will not use ZONE_NORMAL on arm64 ? > > The normal zone is still there, only that it doesn't have any pages. The > page allocator falls back to the DMA zone, so you would not see any > problems with normal page allocation. > > Are you trying to solve anything (performance?) or just what the kernel > shows as part of the normal zone? > > -- > Catalin
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