* Query regarding JFFS2 init
@ 2007-07-19 5:38 Meeta Mishra
2007-07-19 6:55 ` Artem Bityutskiy
0 siblings, 1 reply; 2+ messages in thread
From: Meeta Mishra @ 2007-07-19 5:38 UTC (permalink / raw)
To: linux-mtd
Hi,
I want to know what actually happens when sbin/init is invoked in JFFS2.
I'm using small page Nand device with a 12MB JFFS2 partition (which has
5.6 MB JFFS2 image). Kernel boots up from Nand flash and comes to
sbin/init; the total execution of sbin/init is taking 13 sec (which
seems huge to me).
I traced the read calls during sbin/init execution and found that approx
13 MB of data is being read which is taking approx 7.8 sec (out of 13
sec). Does anyone has any idea about the 13 MB data that's being read?
Regards,
Meeta
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Query regarding JFFS2 init
2007-07-19 5:38 Query regarding JFFS2 init Meeta Mishra
@ 2007-07-19 6:55 ` Artem Bityutskiy
0 siblings, 0 replies; 2+ messages in thread
From: Artem Bityutskiy @ 2007-07-19 6:55 UTC (permalink / raw)
To: Meeta Mishra; +Cc: linux-mtd
On Thu, 2007-07-19 at 11:08 +0530, Meeta Mishra wrote:
> Hi,
>
> I want to know what actually happens when sbin/init is invoked in JFFS2.
>
>
> I'm using small page Nand device with a 12MB JFFS2 partition (which has
> 5.6 MB JFFS2 image). Kernel boots up from Nand flash and comes to
> sbin/init; the total execution of sbin/init is taking 13 sec (which
> seems huge to me).
>
> I traced the read calls during sbin/init execution and found that approx
> 13 MB of data is being read which is taking approx 7.8 sec (out of 13
> sec). Does anyone has any idea about the 13 MB data that's being read?
13 Megs are read because of checking - JFFS2 has to check all data just
after it has been mounted.
--
Best regards,
Artem Bityutskiy (Битюцкий Артём)
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