> -----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. 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
