netdev - Re: [2.6 patch] remove CONFIG_NET_SCH

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 for Android: free password hash cracker in your pocket

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

Message-ID: <20080623194051.GA1885@cs181140183.pp.htv.fi>
Date:	Mon, 23 Jun 2008 22:40:51 +0300
From:	Adrian Bunk <bunk@...nel.org>
To:	"Waskiewicz Jr, Peter P" <peter.p.waskiewicz.jr@...el.com>
Cc:	Patrick McHardy <kaber@...sh.net>,
	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	"Robert P. J. Day" <rpjday@...shcourse.ca>
Subject: Re: [2.6 patch] remove CONFIG_NET_SCH_RR

On Mon, Jun 23, 2008 at 11:31:30AM -0700, Waskiewicz Jr, Peter P wrote:
> >Commit d62733c8e437fdb58325617c4b3331769ba82d70
> >([SCHED]: Qdisc changes and sch_rr added for multiqueue)
> >added a NET_SCH_RR option that was unused since the code
> >went unconditionally into sch_prio.
> 
> I don't agree we should remove this option, purely for the fact that
> there isn't any way a user would know the qdisc existed without reading
> the code.

Most users of the kernel will anyway use a distribution kernel, and 
therefore never see it.

If the problem is a lack of any user documentation then kconfig is wrong 
place to attack that.

> I'd rather see a change to sch_prio.c to correctly wrap the
> RR code, which I should have done in the first place.  My hurdle is when
> the module is selected, NET_SCH_RR isn't defined to be used as an #ifdef
> check in the code. Only when it's selected to be built-in is the symbol
> defined.  If I can get around that, I'll generate a patch to properly
> wrap sch_prio.c code.  I know I'm missing something silly, so any
> guidance is appreciated.

In this case NET_SCH_RR is not a module but a feature inside 
NET_SCH_PRIO, and that can be expressed as follows:

config NET_SCH_RR
        bool "Multi Band Round Robin Queuing (RR)"
        depends on NET_SCH_PRIO

But I doubt making these #ifdef's makes much sense.

IMHO the best you can do is to add a note about RR to the NET_SCH_PRIO 
help text.

> -PJ Waskiewicz

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

--
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