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    SubjectRe: [PATCH] vfs: keep inodes with page cache off the inode shrinker LRU
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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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