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Date: Sun, 24 Apr 2011 08:37:54 +0200
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
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Subject: Re: [Xenomai-help] apt-get mmap() error after upgrading to Xenomai
 2.5.6
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To: at91_enthus <nwromania@domain.hid>
Cc: xenomai-help <xenomai@xenomai.org>

at91_enthus wrote:
> Hi.
> 
> I patched a 2.6.35 kernel with Xenomai 2.5.6.
> 
> I was able to do a first update and even install a few packages on my
> Atmel board.
> However, when I tried to install some more on the board, I got his
> error message:
> -----------------------------------------------------------------------------------------------------------------
> Reading package lists... Error!
> E: Couldn't make mmap of 25165824 bytes - mmap (12: Cannot allocate memory)
> W: Unable to close mmap - mmap (22: Invalid argument)
> E: The package lists or status file could not be parsed or opened.
> -----------------------------------------------------------------------------------------------------------------
> 
> What's interesting about this situation is that apt-get works great
> after a fresh rootfs install.
> As soon as I issue apt-get update/upgrade/install for a
> second/third/... time, I get the above error message.
> 
> The filesystem resides on a ext4 formatted uSD, so this error cannot
> be jffs2-related.
> Also, increasing the cache size in apt configuration files doesn't work.
> 
> Here are some alternative configurations that didn't mess with apt-get:
> 
> (1) kernel 2.6.33, no Xenomai
> (2) kernel  2.6.33, Xenomai 2.5.5
> (3) kernel 2.6.35, no Xenomai
> 
> and here are the ones that made me think that 2.5.6 might interfere
> with apt-get:
> 
> (1) kernel 2.6.33, Xenomai 2.5.6
> (2) kernel 2.6.35, Xenomai 2.5.6

What FCSE options have you configured?

-- 
                                                                Gilles.