netdev - Re: [ofa-general] Re: [PATCH 2/3][NET

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] [day] [month] [year] [list]

Message-ID: <20071012182949.GB12933@one.firstfloor.org>
Date:	Fri, 12 Oct 2007 20:29:49 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Stephen Hemminger <shemminger@...ux-foundation.org>
Cc:	"Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
	Andi Kleen <andi@...stfloor.org>,
	David Miller <davem@...emloft.net>, hadi@...erus.ca,
	jeff@...zik.org, johnpol@....mipt.ru, herbert@...dor.apana.org.au,
	gaagaan@...il.com, Robert.Olsson@...a.slu.se,
	netdev@...r.kernel.org, rdreier@...co.com,
	"Waskiewicz Jr, Peter P" <peter.p.waskiewicz.jr@...el.com>,
	mcarlson@...adcom.com, jagana@...ibm.com,
	general@...ts.openfabrics.org, mchan@...adcom.com, tgraf@...g.ch,
	randy.dunlap@...cle.com, sri@...ibm.com, kaber@...sh.net
Subject: Re: [ofa-general] Re: [PATCH 2/3][NET_BATCH] net core use batching

> Use RCU? or write a generic version and get it reviewed.  You really
> want someone with knowledge of all the possible barrier impacts to
> review it.

I guess he was thinking of using cmpxchg; but we don't support this
in portable code.

RCU is not really suitable for this because it assume
writing is relatively rare which is definitely not the case for a qdisc.
Also general list management with RCU is quite expensive anyways --
it would require a full copy (that is the 'C' in RCU which Linux
generally doesn't use at all) 

-Andi
-
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