DSM-G600, DNS-3xx and NSA-220 Hack Forum

ldomaigne wrote:

However, I found out that this module seems to be compiled with the "USB verbose debug messages" option. As a result, when used in the debian chroot, it generates tons of log each time the USB drive is accessed in reading/writing.

Does someone know how to disable those annoying debug messages? Perhaps could someone, for instance, point me to an usb-storage.ko module that doesn't have the "USB verbose debug messages" enabled?

I know that someone made a usb-storage module without debug messages, but it seems he didn't tell anyone...
Afaik, Paul has made the modules on dev.skcserver.de, not sure if he's aware of the problem.

frodo wrote:

I did compile it without debugging. It filled my logs :-(

The intensive logging is one part of the problem. It can be however easily circumvented by configuring syslog (or syslog-ng depending on your flavor) to not log the kern.debug messages. But another drawback is the performance drop. Enclosed some figures for a transfer of a 240 Mb file from the internal disk to an extern usb disk with EXT2 file system:

copy from /mnt/HD_a2 to an external usb disk:
without starting chroot debian etch    : 16s (15Mb/s)
with vanilla chroot debian etch            :  39s (6.1Mb/s)
with debian etch + remove kern.debug:  29s (8.3Mb/s)

It's about a factor 2 when you copy with or without starting the chroot debian!!
My guess is that the etch syslog sub-system is flooded with the kernel messages from the USB driver. This seems to be confirmed by conducting the same experience with an optimized module:

same with optimized usb-storage.ko module:
without starting chroot debian etch : 15s (16Mb/s)
with vanilla chroot debian etch         : 16s (15Mb/s)

Cheers,
Loïc.

ldomaigne wrote:

... Well, it went much better than I expected, and I was able to produce today the 'usb-storage.ko' module without debugging. It can be downloaded at:
http://www.domaigne.com/download/dns-323/

Enjoy
Loïc.

I just tested your usb-storage.ko module. It works.    (FW 1.03)

ldomaigne wrote:

fonz wrote:

I know that someone made a usb-storage module without debug messages, but it seems he didn't tell anyone...
Afaik, Paul has made the modules on dev.skcserver.de, not sure if he's aware of the problem.

Ok, I didn't plan to go that far... But I tried yesterday to install the cross-compile environment on my Fedora Core accordingly to:
http://dns323.kood.org/howto:crosscompile.

Well, it went much better than I expected, and I was able to produce today the 'usb-storage.ko' module without debugging. It can be downloaded at:
http://www.domaigne.com/download/dns-323/

Enjoy
Loïc.

Excellent!!

You need to remove the module from the memory.

if you do lsmod you'll have the module name, I guess usb-storage

then you can unload the module with rmmod, then reinsert

so it'll go like this:

rmmod usb-storage
insmod <path to non-debug version>/usb-storage

Cheers