lkml.org 
[lkml]   [2007]   [Nov]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: network driver usage count
Date
Stephen Hemminger <shemminger@linux-foundation.org> writes:

> On Wed, 21 Nov 2007 20:45:11 +0100
> Ferenc Wagner <wferi@niif.hu> wrote:
>
>> Under 2.6.23.1, my lsmod output shows this:
>>
>> $ lsmod | grep tg3
>> tg3 100580 0
>>
>> The usage count is zero, even though it drives my two physical
>> interfaces:
>>
>> $ ls -l /sys/class/net/eth-gb?/device/driver
>> lrwxrwxrwx 1 root root 0 2007-11-21 19:58 /sys/class/net/eth-gb1/device/driver -> ../../../bus/pci/drivers/tg3
>> lrwxrwxrwx 1 root root 0 2007-11-21 19:58 /sys/class/net/eth-gb2/device/driver -> ../../../bus/pci/drivers/tg3
>>
>> These interfaces are up and bonded together, but that doesn't seem to
>> matter at all. I also checked other machines, the network driver
>> (tg3, e1000) usage counts are always zero under various recent 2.6
>> kernels, but nonzero under 2.4.21 for example.
>>
>> And really, the module could be removed, cutting my ssh session. :)
>>
>> Was this made possible intentionally? If yes, why?
>
> Yes, so devices can be removed at anytime.

Hmm, that would warrant nuking all the reference counts on every
driver. I must be missing something, since I really feel it goes
against common sense. Can you point me to some discussion of this
change? I mean, I couldn't remove the driver of a mounted filesystem.
So why can I remove a driver serving live network traffic?
--
Thanks,
Feri.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-11-21 23:19    [W:0.044 / U:0.336 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site