* Root mounting time
@ 2006-06-07 12:16 Davide CASCONE
2006-06-07 12:28 ` David Woodhouse
0 siblings, 1 reply; 2+ messages in thread
From: Davide CASCONE @ 2006-06-07 12:16 UTC (permalink / raw)
To: linux-mtd
I'm working in XIP mode on a OMAP platform using Sibley device in burst mode (burst frequency = 48MHz). I see that it's necessary about 1 sec to mount JFFS2 on a 1MB root image. Do you feel this is a reasonable time? How long does it usually take to mount the JFFS2 on a typical root image?
Thanks in advance.
Best regards,
Davide
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Root mounting time
2006-06-07 12:16 Root mounting time Davide CASCONE
@ 2006-06-07 12:28 ` David Woodhouse
0 siblings, 0 replies; 2+ messages in thread
From: David Woodhouse @ 2006-06-07 12:28 UTC (permalink / raw)
To: Davide CASCONE; +Cc: linux-mtd
On Wed, 2006-06-07 at 14:16 +0200, Davide CASCONE wrote:
> I'm working in XIP mode on a OMAP platform using Sibley device in
> burst mode (burst frequency = 48MHz). I see that it's necessary about
> 1 sec to mount JFFS2 on a 1MB root image. Do you feel this is a
> reasonable time? How long does it usually take to mount the JFFS2 on a
> typical root image?
Are you using the current git tree and summary support?
I can mount a 512MiB NAND flash in 5.9s on hardware where I get only
2.7MiB/s transfer speed from the flash. Mounting 1MiB from NOR flash
really shouldn't be that slow.
Profile the current code and show where it takes all the time.
I have plans to halve the size of the summary nodes, which should go
into the git tree this week too.
--
dwmw2
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