Messages in this thread | | | Date | Wed, 15 Apr 2009 11:37:44 -0400 | From | Mark Lord <> | Subject | Re: USB storage no-boot regression (bisected) |
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Arjan van de Ven wrote: > On Wed, 15 Apr 2009 10:25:05 -0400 > Mark Lord <lkml@rtr.ca> wrote: > >> Greg KH wrote: >>> .. >>> The issue is that you were just lucky that your machine worked >>> properly previously. My boxes with the same type of setup didn't, >>> so I quickly realized what the root delay boot option was for. You >>> need to just do the same thing here, there's nothing else we can do. >> .. >> >> Bad excuse. >> >> SATA drives also take variable amounts of time to "show up" at boot. >> Perhaps Jeff should customize libata for your and Arjan's exact >> setups, just to help with understanding the point here. :) > > the difference is that with sata you know when you are done and have all > possible drives. No so much much with USB. So with SATA we can, and do, > wait for the scan to complete at the right point in the boot. > >> The speed ups are fine (and welcome), but we really now need >> Arjan to follow-up with a patch to have the kernel *by default* >> wait a little longer for the rootfs to show up. >> >> Not forever, just a few seconds to compensate for the regression. > > seconds!!!!! > The whole kernel boots in half a second! ..
Oh, absolutely I agree.
That's why I'm not suggesting a DELAY, but rather a TIMEOUT (where it keeps trying up until the timeout).
For desktop, it should really just wait forever, but I can understand situations (server room) where that would be a Really Bad Idea.
So just have it sit there and retry the rootfs for a few seconds, to compensate for this regression and also for others that have yet to be discovered / reported.
Everyone's life will be easier that way.
Cheers
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