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Date: Thu, 18 Aug 2022 19:22:26 +0530 From: Aneesh Kumar K V <aneesh.kumar@...ux.ibm.com> To: linux-mm@...ck.org, akpm@...ux-foundation.org Cc: Wei Xu <weixugc@...gle.com>, Huang Ying <ying.huang@...el.com>, Yang Shi <shy828301@...il.com>, Davidlohr Bueso <dave@...olabs.net>, Tim C Chen <tim.c.chen@...el.com>, Michal Hocko <mhocko@...nel.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Hesham Almatary <hesham.almatary@...wei.com>, Dave Hansen <dave.hansen@...el.com>, Jonathan Cameron <Jonathan.Cameron@...wei.com>, Alistair Popple <apopple@...dia.com>, Dan Williams <dan.j.williams@...el.com>, Johannes Weiner <hannes@...xchg.org>, jvgediya.oss@...il.com, Bharata B Rao <bharata@....com> Subject: Re: [PATCH v15 01/10] mm/demotion: Add support for explicit memory tiers On 8/18/22 6:40 PM, Aneesh Kumar K.V wrote: > + */ > +#define MEMTIER_CHUNK_BITS 7 > +#define MEMTIER_CHUNK_SIZE (1 << MEMTIER_CHUNK_BITS) > +/* > + * Smaller abstract distance values imply faster(higher) memory tiers. Offset > + * the DRAM adistance so that we can accommodate devices with a slightly lower > + * adistance value (slightly slower) than default DRAM adistance to be part of (^^^ slightly faster) > + * the same memory tier. > + */ >
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