Messages in this thread | | | Subject | Re: [PATCH] vfs: keep inodes with page cache off the inode shrinker LRU | From | santosh.shilimkar@oracle ... | Date | Fri, 6 Mar 2020 17:08:03 -0800 |
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On 3/6/20 12:34 PM, Nishanth Menon wrote: > On 13:11-20200226, santosh.shilimkar@oracle.com wrote: >> +Nishant, Tero >> >> On 2/26/20 1:01 PM, Arnd Bergmann wrote: >>> On Wed, Feb 26, 2020 at 7:04 PM <santosh.shilimkar@oracle.com> wrote: >>>> >>>> On 2/13/20 8:52 AM, Arnd Bergmann wrote: >>>>> On Wed, Feb 12, 2020 at 9:50 AM Russell King - ARM Linux admin >>>>> <linux@armlinux.org.uk> wrote: >>>> >>>> The Keystone generations of SOCs have been used in different areas and >>>> they will be used for long unless says otherwise. >>>> >>>> Apart from just split of lowmem and highmem, one of the peculiar thing >>>> with Keystome family of SOCs is the DDR is addressable from two >>>> addressing ranges. The lowmem address range is actually non-cached >>>> range and the higher range is the cacheable. >>> >>> I'm aware of Keystone's special physical memory layout, but for the >>> discussion here, this is actually irrelevant for the discussion about >>> highmem here, which is only about the way we map all or part of the >>> available physical memory into the 4GB of virtual address space. >>> >>> The far more important question is how much memory any users >>> (in particular the subset that are going to update their kernels >>> several years from now) actually have installed. Keystone-II is >>> one of the rare 32-bit chips with fairly wide memory interfaces, >>> having two 72-bit (with ECC) channels rather than the usual one >>> or two channels of 32-bit DDR3. This means a relatively cheap >>> 4GB configuration using eight 256Mx16 chips is possible, or >>> even a 8GB using sixteen or eighteen 512Mx8. >>> >>> Do you have an estimate on how common these 4GB and 8GB >>> configurations are in practice outside of the TI evaluation >>> board? >>> >> From my TI memories, many K2 customers were going to install >> more than 2G memory. Don't remember 8G, but 4G was the dominant >> one afair. Will let Nishant/Tero elaborate latest on this. >> > > Thanks for the headsup, it took a little to dig up the current > situation: > > ~few 1000s still relevant spread between 4G and 8G (confirmed that both > are present, relevant and in use). > > I wish we could sunset, but unfortunately, I am told(and agree) > that we should'nt just leave products (and these are long term > products stuck in critical parts in our world) hanging in the air, and > migrations to newer kernel do still take place periodically (the best > I can talk in public forum at least). > Thanks Nishant !!
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