Arch Linux

andre.ramaciotti

Member

From: Brazil

Registered: 2007-04-06

Posts: 649

Help with kernel modules

I was going to post a new topic about boot speed, but I already know the answers I'll probably get - blacklist modules you don't need and make daemons load on background. Well, the later I've already done and now I need some help with the first.

I've already achieved a decrease of 8 seconds in my boot time (according to bootcharter) by blacklisting some modules, but it's still rather slow (47 seconds until agetty). I don't think I'll get much faster than this with my ~700MHz PIII, but I'd like to try.

I'd like to know why some modules are being loaded. Some are easy to know, like 'snd', but there are some that I don't have the slightest idea of what they are and googling isn't really helping.

Is there a place where I can find what each module does? Or if you're willing to check my lsmod to see which modules I can blacklist, I may paste it here.

TIA

---

(lambda ())

neotuli

Lazy Developer

From: London, UK

Registered: 2004-07-06

Posts: 1,204

Website

Re: Help with kernel modules

modinfo <module_name> will usually give you a reasonable description of the module.

---

The suggestion box only accepts patches.

andre.ramaciotti

Member

From: Brazil

Registered: 2007-04-06

Posts: 649

Re: Help with kernel modules

I've found this command a little after I posted and it did helped a little, but I think now I'll have to go by try and error. E.g. the sg module, modinfo says it is a SCSI generic driver and lsmod says there is no other module using it, but why it's loaded then? Maybe it's because of my PATA disks are being used as sd*, or maybe I may need it when I burn a CD.

Anyway, thanks. I achieved a huge improvement, from ~50 seconds to 32 seconds.

---

(lambda ())