On Sun, Apr 20, 2008 at 05:04:14PM +0100, Jamie Lokier wrote:
I was thinking this:
Hamish Moffatt wrote (Message-ID: 20080407073227.GA6317@cloud.net.au):
Sorry I should've said 512MiB perhaps: 512 megabytes. UBI attach time appears to be about 6 seconds.
If 6 seconds is as fast as it can be done, annoying but fair enough.
Adding _another_ 6 seconds to the boot time seems a lot to me.
Yes. I have a prototype system here booting a minimal system from NOR flash then booting the full system from NAND via kexec. I'm suffering my 6 seconds of UBI attach time twice each boot.
Six seconds does seem to be abnormal though - I don't have a hardware NAND controller so it's all software ECC, GPIO for chip selects etc. The performance is said to be much better with a hardware controller.
To remove the double scan:
However, if there was a protocol for bootloader to pass the scan results to the booted kernel, that would be very nice.
That would certainly help my case. Fortunately my device is usually always-on and therefore boot time is not critical, and we don't suspend/resume.
Hamish