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[ts-7000] Re: 7800 - uninterruptible sleep

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Subject: [ts-7000] Re: 7800 - uninterruptible sleep
From: Alexander Clouter <>
Date: Thu, 26 Jun 2008 10:46:18 +0100
Hi,

jirimacku <> [20080626 08:53:33 -0000]:
>
> after couple of happy days I've got trouble again. My data collecting
> application which is writing to SD card quite often hangs after some
> time with D status. 
>
When I did use the supplied TS kernels I noticed something similar to this 
behaviour too[1]; the CPU span at 100% in the kernel task linked to the SD 
card, the serial port stop responding and then after a short time it would 
come back.

> Among the locked processes is my application (miniTele) but also
> pdflush and some others. Any attempt to unlock the filesystem failed,
> but also the shutdown, reboot etc. (maybe because the var/log is also
> on the SD card?). 
> 
That sounds familiar.

> This situation is happen twice (after approx. the same time). I'm
> running the latest TS's software revision. 
> 
I'm unsure if the issue you are seeing is the same that I saw as

> Is jfs good for flash device? I've thought it's robust.
>
Might be talking about JFFS2 but you'll get your answer here:

http://www.linux-mtd.infradead.org/faq/jffs2.html#L_stick_jffs2

Cheers

Alex
 
[1] I guess I should have reported this but as it seemed so glaringly obvious 
        I assumed I was doing something wrong (being new to the board) and 
        someone else seemed to have the issue covered[2]...my bad :-/
[2] http://tech.groups.yahoo.com/group/ts-7000/message/7908

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