From: Dan Williams <email@example.com>
To: Vishal Verma <firstname.lastname@example.org>
Cc: Linux NVDIMM <email@example.com>,
QI Fuli <firstname.lastname@example.org>,
"Hu, Fenghua" <email@example.com>
Subject: Re: [ndctl PATCH 0/7] Policy based reconfiguration for daxctl
Date: Thu, 16 Sep 2021 15:12:41 -0700 [thread overview]
Message-ID: <CAPcyv4jGs9t6zKdzOJL1watQ7RvC0qdbT=jB2Cn948iM+0eLQw@mail.gmail.com> (raw)
On Tue, Aug 31, 2021 at 2:05 AM Vishal Verma <firstname.lastname@example.org> wrote:
> These patches add policy (config file) support to daxctl. The
> introductory user is daxctl-reconfigure-device. Sysadmins may wish to
> use daxctl devices as system-ram, but it may be cumbersome to automate
> the reconfiguration step for every device upon boot.
> Introduce a new option for daxctl-reconfigure-device, --check-config.
> This is at the heart of policy based reconfiguration, as it allows
> daxctl to look up reconfiguration parameters for a given device from the
> config system instead of the command line.
> Some systemd and udev glue then automates this for every new dax device
> that shows up, providing a way for the administrator to simply list all
> the 'system-ram' UUIDs in a config file, and not have to worry about
> anything else.
> An example config file can be:
> # cat /etc/ndctl/daxctl.conf
Take these comments as provisional until I read through the rest, but
this is just a reaction to the proposed ini format.
> [auto-online unique_identifier_foo]
I am thinking this section name should be "reconfigure-device
unique_identifier_foo" if only because resize might also be something
someone wants to do, and if other commands get config automation it
makes it clearer which config snippets apply to which command.
> uuid = 48d8e42c-a2f0-4312-9e70-a837faafe862
I think this should be called:
...or something like that to make it clear this depends on dax devices
emitted by libnvdimm, and not those that come from "soft-reserved"
memory. It also helps distinguish if we ever get UUIDs in the HMAT
which is something I have been meaning to propose.
> mode = system-ram
I can see this being "mode = devdax" if feature was being used to
change size or alignment.
> online = true
> movable = false
I wonder if these keys should be prefixed by the mode name:
system-ram.online = true
system-ram.movable = false
...so it's a bit more self documenting about which parameters are
sub-options, and delineates them from generic options like size.
> Any file under '/etc/ndctl/' can be used - all files with a '.conf' suffix
> will be considered when looking for matches.
any concern about name collisions between ndctl, daxctl, and cxl-cli
next prev parent reply other threads:[~2021-09-16 22:12 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-31 9:04 [ndctl PATCH 0/7] Policy based reconfiguration for daxctl Vishal Verma
2021-08-31 9:04 ` [ndctl PATCH 1/7] ndctl: Update ndctl.spec.in for 'ndctl.conf' Vishal Verma
2021-09-02 12:15 ` qi.fuli
2021-08-31 9:04 ` [ndctl PATCH 2/7] daxctl: Documentation updates for persistent reconfiguration Vishal Verma
2021-09-16 22:47 ` Dan Williams
2021-11-17 23:02 ` Verma, Vishal L
2021-08-31 9:04 ` [ndctl PATCH 3/7] util/parse-config: refactor filter_conf_files into util/ Vishal Verma
2021-09-02 12:17 ` qi.fuli
2021-09-16 22:54 ` Dan Williams
2021-08-31 9:04 ` [ndctl PATCH 4/7] daxctl: add basic config parsing support Vishal Verma
2021-09-02 12:19 ` qi.fuli
2021-09-16 22:58 ` Dan Williams
2021-11-17 23:17 ` Verma, Vishal L
2021-08-31 9:04 ` [ndctl PATCH 5/7] util/parse-configs: add a key/value search helper Vishal Verma
2021-09-02 13:12 ` qi.fuli
2021-09-16 23:54 ` Dan Williams
2021-11-17 23:21 ` Verma, Vishal L
2021-08-31 9:04 ` [ndctl PATCH 6/7] daxctl/device.c: add an option for getting params from a config file Vishal Verma
2021-09-17 1:59 ` Dan Williams
2021-11-17 23:45 ` Verma, Vishal L
2021-08-31 9:04 ` [ndctl PATCH 7/7] daxctl: add systemd service and udev rule for auto-onlining Vishal Verma
2021-09-03 0:56 ` qi.fuli
2021-09-17 18:10 ` Dan Williams
2021-11-17 23:29 ` Verma, Vishal L
2021-11-17 23:43 ` Dan Williams
2021-11-18 2:40 ` Verma, Vishal L
2021-11-18 3:40 ` Dan Williams
2021-09-16 22:12 ` Dan Williams [this message]
2021-11-19 20:57 ` [ndctl PATCH 0/7] Policy based reconfiguration for daxctl Verma, Vishal L
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).