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Re: JFFS2 issues
Le Tue, 5 Aug 2008 19:04:48 -0700,
"Nancy Isaac" <nancy.isaac@xxxxxxxxx> a écrit :
> Problem1 : It takes about 5 minutes for me to boot up the system.
> Question: Does anyone have any suggestions to reduce this time?
Have a look at http://elinux.org/Boot_Time. Basically, the first step
is to measure what is taking time: kernel load, kernel uncompression,
kernel initialization, userspace initialization, etc. Considering the
siez of your NAND flash and the use of JFFS2, the mounting process is
probably taking quite some time.
> The common response I get is that I should use YAFFS2. I can't find a
> way to program a yaffs2 image for both kernel and rootfs from uboot.
> Uboot seems to think the file system type is JFFS2 and all commands
> are designed with that in mind.
I'm not sure to understand. U-Boot is only supposed to Flash the kernel
and the root filesystem image at a given location in Flash. Why should
it require to "understand" the filesystem image format ?
I would suggest asking that kind of question to the
linux-embedded@xxxxxxxxxxxxxxx list, as it's kind of more advanced
and specific than what the kernelnewbies list has been created for.
> Problem2: After a few days of running the system while updating the
> system with new releases and writing logs, we end up with a real
> sluggish system. We run out of memory and when I do a slabtop,
> jffs2_refblock shows something like this:
I have no idea. But David Woodhouse (that you Cc'ed) will certainly
answer your question. You probably should have Cc'ed the
linux-mtd@xxxxxxxxxxxxxxxxxxx list as well.
Hope this helps,
Thomas
--
Thomas Petazzoni, Free Electrons
Kernel, drivers and embedded Linux development,
consulting, training and support.
http://free-electrons.com
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