On Sun, 2010-09-05 at 01:45 +0100, Ben Hutchings wrote:
> Are you quite sure you used the modified kernel?
Nope.
> 'cat /proc/version' will tell you for sure which version you are
> running.
$ cat /proc/version
Linux version 2.6.32-5-amd64 (Debian 2.6.32-20.2) (russell-deb...@stuart.id.au)
(gcc version 4.3.5 (Debian 4.3.5-2) ) #1 SMP Mon Sep 6 09:14:09 EST 2010
So that looks like I am running the right kernel. But because the
symptoms didn't change overly I had my doubts from the beginning, and
thus have been trying to prove I was running the kernel with your patch
applied. Doing that in various ways is why it took me a while to
respond to your request to test the patch.
One way I tried to confirm it by adding trace:
--- x/linux-2.6-2.6.32/drivers/net/tun.c 2009-12-03 13:51:21.000000000
+1000
+++ linux-2.6-2.6.32/drivers/net/tun.c 2010-09-06 08:09:44.068458190 +1000
@@ -36,7 +36,7 @@
#define DRV_NAME "tun"
#define DRV_VERSION "1.6"
-#define DRV_DESCRIPTION "Universal TUN/TAP device driver"
+#define DRV_DESCRIPTION "Universal TUN/TAP device driver +
0001-tun-Don-t-add-sysfs-attributes-to-devices-without-sy.patch applied"
#define DRV_COPYRIGHT "(C) 1999-2004 Max Krasnyansky <m...@qualcomm.com>"
#include <linux/module.h>
@@ -1006,7 +1006,9 @@
if (err < 0)
goto err_free_sk;
- if (device_create_file(&tun->dev->dev, &dev_attr_tun_flags) ||
+ printk(KERN_INFO
"0001-tun-Don-t-add-sysfs-attributes-to-devices-without-sy.patch\n");
+ if (!net_eq(dev_net(tun->dev), &init_net) ||
+ device_create_file(&tun->dev->dev, &dev_attr_tun_flags) ||
device_create_file(&tun->dev->dev, &dev_attr_owner) ||
device_create_file(&tun->dev->dev, &dev_attr_group))
printk(KERN_ERR "Failed to create tun sysfs files\n");
None of the trace is ever appears in /var/log/kern.log, which is to say
"grep 0001-tun /var/log/kern.log" prints nothing. Yet I am evidently
running a different kernel as I don't ever hit the BUG the buildd kernel
generates. I don't have a clue what is going on.
The steps I used to generate the kernel are:
$ apt-get source linux-2.6
$ cd linux-2.6-2.6.32
$ fakeroot debian/rules source
$ fakeroot debian/rules setup
$ patch -p1
<.../0001-tun-Don-t-add-sysfs-attributes-to-devices-without-sy.patch
$ ed drivers/net/tun.c # add trace
$ ed debian/changelog # add rev 2.6.30-20.2
$ fakeroot debian/rules binary
$ sudo dpkg -i ../linux-image-2.6.32-5-amd64_2.6.32-20.2_amd64.deb
$ sudo ed /boot/grub/grub.cfg # set the default kernel
$ sudo reboot -f
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