Messages in this thread | | | Subject | Re: [PATCH v12 02/11] mm, swap: Add infrastructure for saving page metadata on swap | From | Dave Hansen <> | Date | Mon, 5 Mar 2018 11:35:42 -0800 |
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On 03/05/2018 11:29 AM, Khalid Aziz wrote: > ADI data is per page data and is held in the spare bits in the RAM. It > is loaded into the cache when data is loaded from RAM and flushed out to > spare bits in the RAM when data is flushed from cache. Sparc allows one > tag for each ADI block size of data and ADI block size is same as > cacheline size.
Which does not square with your earlier assertion "ADI data is per page data". It's per-cacheline data. Right?
> When a page is loaded into RAM from swap space, all of > the associated ADI data for the page must also be loaded into the RAM, > so it looks like page level data and storing it in page level software > data structure makes sense. I am open to other suggestions though.
Do you have a way to tell that data is not being thrown away? Like if the ADI metadata is different for two different cachelines within a single page?
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