Messages in this thread | | | Date | Wed, 17 Feb 2010 10:41:34 -0800 (PST) | From | david@lang ... | Subject | Re: Linux mdadm superblock question. |
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On Wed, 17 Feb 2010, Nick Bowler wrote:
> On 19:27 Wed 17 Feb , Volker Armin Hemmann wrote: >> On Mittwoch 17 Februar 2010, Nick Bowler wrote: >>> On 09:41 Wed 17 Feb , david@lang.hm wrote: >>>> for a distro that is trying to make one kernel image run on every >>>> possible type of hardware features like initramfs (and udev, modeules, >>>> etc) are wonderful. >>>> >>>> however for people who run systems that are known ahead of time and >>>> static (and who build their own kernels instead of just relying on the >>>> distro default kernel), all of this is unnessesary complication, which >>>> leaves more room for problems to creep in. >>> >>> Such people can easily construct an initramfs containing busybox and >>> mdadm with a shell script hardcoded to mount their root fs and run >>> switch_root. It's a ~10 minute jobbie that only needs to be done once. >> >> and even better when you don't have to do that one time job at all. > > But people who are building their own kernels are already doing a > (much harder, imo) one time job of configuring their kernels. > >> btw, what about additional delay? > > It takes about half a second for mdadm to assemble my root array, is > that what you're referring to? > > I assume that kernel auto-assembly is no faster, although I've never > used it. Regardless, half a second isn't very long to wait.
If you are aiming for a 5-second boot time it's 10% of your total boot time. That's a lot for a feature that's not needed.
David Lang
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