From: santosh.shilimkar@oracle.com
To: Arnd Bergmann <arnd@arndb.de>, Nishanth Menon <nm@ti.com>,
Tero Kristo <t-kristo@ti.com>
Cc: Russell King - ARM Linux admin <linux@armlinux.org.uk>,
Linus Torvalds <torvalds@linux-foundation.org>,
Michal Hocko <mhocko@suse.com>, Rik van Riel <riel@surriel.com>,
Catalin Marinas <catalin.marinas@arm.com>,
kernel-team@fb.com, Dave Chinner <david@fromorbit.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux-MM <linux-mm@kvack.org>, Yafang Shao <laoar.shao@gmail.com>,
Al Viro <viro@zeniv.linux.org.uk>,
Johannes Weiner <hannes@cmpxchg.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Roman Gushchin <guro@fb.com>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Kishon Vijay Abraham I <kishon@ti.com>,
Santosh Shilimkar <ssantosh@kernel.org>
Subject: Re: [PATCH] vfs: keep inodes with page cache off the inode shrinker LRU
Date: Wed, 26 Feb 2020 13:11:26 -0800 [thread overview]
Message-ID: <7c4c1459-60d5-24c8-6eb9-da299ead99ea@oracle.com> (raw)
In-Reply-To: <CAK8P3a13jGdjVW1TzvCKjRBg-Yscs_WB2K1kw9AzRfn3G9a=-Q@mail.gmail.com>
+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.
regards,
Santosh
next prev parent reply other threads:[~2020-02-26 21:11 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-11 17:55 [PATCH] vfs: keep inodes with page cache off the inode shrinker LRU Johannes Weiner
2020-02-11 18:20 ` Johannes Weiner
2020-02-11 19:05 ` Rik van Riel
2020-02-11 19:31 ` Johannes Weiner
2020-02-11 23:44 ` Andrew Morton
2020-02-12 0:28 ` Linus Torvalds
2020-02-12 0:47 ` Andrew Morton
2020-02-12 1:03 ` Linus Torvalds
2020-02-12 8:50 ` Russell King - ARM Linux admin
2020-02-13 9:50 ` Lucas Stach
2020-02-13 16:52 ` Arnd Bergmann
2020-02-15 11:25 ` Geert Uytterhoeven
2020-02-15 16:59 ` Arnd Bergmann
2020-02-16 9:44 ` Geert Uytterhoeven
2020-02-16 19:54 ` Chris Paterson
2020-02-16 20:38 ` Arnd Bergmann
2020-02-20 14:35 ` Chris Paterson
2020-02-26 18:04 ` santosh.shilimkar
2020-02-26 21:01 ` Arnd Bergmann
2020-02-26 21:11 ` santosh.shilimkar [this message]
2020-03-06 20:34 ` Nishanth Menon
2020-03-07 1:08 ` santosh.shilimkar
2020-03-08 10:58 ` Arnd Bergmann
2020-03-08 14:19 ` Russell King - ARM Linux admin
2020-03-09 13:33 ` Arnd Bergmann
2020-03-09 14:04 ` Russell King - ARM Linux admin
2020-03-09 15:04 ` Arnd Bergmann
2020-03-10 9:16 ` Michal Hocko
2020-03-09 15:59 ` Catalin Marinas
2020-03-09 16:09 ` Russell King - ARM Linux admin
2020-03-09 16:57 ` Catalin Marinas
2020-03-09 19:46 ` Arnd Bergmann
2020-03-11 14:29 ` Catalin Marinas
2020-03-11 16:59 ` Arnd Bergmann
2020-03-11 17:26 ` Catalin Marinas
2020-03-11 22:21 ` Arnd Bergmann
2020-02-12 3:58 ` Matthew Wilcox
2020-02-12 8:09 ` Michal Hocko
2020-02-17 13:31 ` Pavel Machek
2020-02-12 16:35 ` Johannes Weiner
2020-02-12 18:26 ` Andrew Morton
2020-02-12 18:52 ` Johannes Weiner
2020-02-12 12:25 ` Yafang Shao
2020-02-12 16:42 ` Johannes Weiner
2020-02-13 1:47 ` Yafang Shao
2020-02-13 13:46 ` Johannes Weiner
2020-02-14 2:02 ` Yafang Shao
2020-02-13 18:34 ` [PATCH v2] " Johannes Weiner
2020-02-14 16:53 ` [PATCH] " kbuild test robot
2020-02-14 21:30 ` kbuild test robot
2020-02-14 21:30 ` [PATCH] vfs: fix boolreturn.cocci warnings kbuild test robot
2020-05-12 21:29 ` [PATCH] vfs: keep inodes with page cache off the inode shrinker LRU Johannes Weiner
2020-05-13 1:32 ` Yafang Shao
2020-05-13 13:00 ` Johannes Weiner
2020-05-13 21:15 ` Andrew Morton
2020-05-14 11:27 ` Johannes Weiner
2020-05-14 2:24 ` Andrew Morton
2020-05-14 10:37 ` Johannes Weiner
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