netdev - Re: Patch: [NET]: Remove CONFIG_PROC

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sat, 01 Mar 2008 13:48:52 +0100
From:	Oliver Hartkopp <oliver@...tkopp.net>
To:	Eric Dumazet <dada1@...mosbay.com>
CC:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: Patch: [NET]: Remove CONFIG_PROC_FS depency for pcounter inuse

Eric Dumazet wrote:
> Oliver Hartkopp a écrit :
>> It's not about the counter implementation but the integration/usage 
>> in the networking subsystem.
>>
>> Or does your mentioned patch mean, that the added functions in 
>> proto_[un|]register() will also be reverted?
>>
>
> A patch will make inet use percpu_counter instead of pcounter.
>
> Then a zap patch will delete lib/pcounter.c & include/linux/pcounter.h
>
> I dont understand why you say CONFIG_PROC_FS is *forced*.
> I can build a kernel with CONFIG_PROC_FS=n, with working INET.
Right. With enabled CONFIG_EMBEDDED you might have CONFIG_INET with 
CONFIG_PROC_FS=n.

But this is not the thing, i wanted to point out.

My major concern was, that "whatever-per-cpu-counters" are 
allocated/initialized in "proto_register()" for *every* network protocol 
but *only* IPv[4|6] is using these counters (when CONFIG_PROC_FS is set).

I just wanted to point out the situation for network protocols that do 
not need any inuse counters. In the current implementation the pcounters 
are allocated for every networking protocol in proto_register() which 
does not look optimized to me.

Will this change with your patch that uses percpu_counter instead of 
pcounter??

Regards,
Oliver
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html