On Tue, Nov 5, 2024 at 4:45 PM Bird, Tim <Tim.Bird@xxxxxxxx> wrote: > > > > > -----Original Message----- > > From: Brian Masney <bmasney@xxxxxxxxxx> > > Sent: Tuesday, November 5, 2024 5:10 PM > > To: Saravana Kannan <saravanak@xxxxxxxxxx> > > Cc: Bird, Tim <Tim.Bird@xxxxxxxx>; linux-embedded@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx > > Subject: Re: Boot-time initiative (SIG) thoughts and next steps > > > > On Mon, Oct 28, 2024 at 03: 33: 29PM -0700, Saravana Kannan wrote: > On Sun, Oct 27, 2024 at 6: 30 PM Bird, Tim > > <Tim. Bird@ sony. com> wrote: > > > On Fri, Oct 25, 2024 at 11: 18 AM Bird, Tim <Tim. Bird@ sony. com> wrote: > > > > > On Mon, Oct 28, 2024 at 03:33:29PM -0700, Saravana Kannan wrote: > > > On Sun, Oct 27, 2024 at 6:30 PM Bird, Tim <Tim.Bird@xxxxxxxx> wrote: > > > > > On Fri, Oct 25, 2024 at 11:18 AM Bird, Tim <Tim.Bird@xxxxxxxx> wrote: > > > > > > = wiki account = > > > > > > The wiki where we'll be maintaining information about > > > > > > boot time, and about activities of the boot time SIG, is the elinux wiki. > > > > > > The page we'll be focusing on is: https://elinux.org/Boot_Time. > > > > > > If you are interested in helping update and maintain the information there > > > > > > (which I hope almost everyone is), then please make sure you have a user > > > > > > account on the wiki. > > > > > > If you don't have one, please go here: > > > > > > https://elinux.org/Special:RequestAccount > > > > > > I have to manually approve accounts in order to fight spambots. It might > > > > > > take a few days for me to get to your request. It's very helpful if you > > > > > > put a comment in one of the request fields about this being related to > > > > > > the boot-time initiative or SIG, so I can distinguish your request from > > > > > > spam requests. > > > > > > > > > > Can we instead keep this all a part of the kernel docs instead of the > > > > > wiki? Couple of reasons for that: > > > > > > > > Ideally, we would put some material in the wiki, and also > > > > produce a document - some kind of "boot-time tuning guide" that can > > > > live in the kernel tree. > > > > > > This is the part I care most about being in the kernel docs. Eg: what > > > configs to use. What commandline params to set. Dos and Don'ts for the > > > drivers, etc. So, good to see that is an acceptable option. > > > > I'm interested to help contribute to a boot speed document, and I > > suspect some others at Red Hat are interested as well. Personally, > > I would prefer to have a section in the kernel documentation over a > > Wiki > OK - that's at least two votes for an upstream kernel doc. > > I think it would be good to have a boot time tuning guide upstream. > I hope to augment that with a tool that will check for various > items or conditions on a machine, and give a list of recommendations. > This could go along with the tuning guide. > > However, I would still plan to collect some information on the wiki > that I don't think will be upstreamable. For example, see this page: > https://elinux.org/Disable_Console > > The first few items on that page could be sentences in a kernel tuning > guide, but the data from actual uses I don't think belongs there, as > it will quickly bitrot. (Indeed the information on that page has already > bitrotted.) > > I think it would be useful to gather this results information on a wiki, but its > possible that if reports are sent by e-mail, just a few lore links would > suffice. > > > Besides arch-specific recommendations, we can also contribute > > some boot speed improvement techniques that we've done that are > > specific to RT. > That would be great. > > > In addition to the recommended configs, I think it would also be > > beneficial to list some upstream patches that improve boot speed along > > with the kernel version it was introduced in. > I think this would be good also. > > We should discuss what a kernel boot-time tuning guide should look like > and how it should be organized. Starting this may be one of the first > things the SIG does. I wrote something like this for the Android ecosystem https://source.android.com/docs/core/architecture/kernel/boot-time-opt So, I'm happy to add something like this to the kernel doc if we have some consensus on having a kernel doc. -Saravana > The other one may be a data-gathering tool that > I've been working on, that (of all things) automatically populates a wiki > with boot time data. I will explain my intentions when I post the script > (likely tomorrow). > -- Tim >
