netdev - Re: [PATCH net-next-2.6] net: add rcu protection to netdev->ifalias

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: <1305693312.6741.58.camel@edumazet-laptop>
Date:	Wed, 18 May 2011 06:35:11 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Stephen Hemminger <shemminger@...tta.com>
Cc:	David Miller <davem@...emloft.net>, kaber@...sh.net,
	netdev@...r.kernel.org, remi.denis-courmont@...ia.com
Subject: Re: [PATCH net-next-2.6] net: add rcu protection to netdev->ifalias

Le mercredi 18 mai 2011 à 00:39 +0200, Eric Dumazet a écrit :

> I dont know, if it happens to be too hard, we'll just stick again rtnl
> for "ip link show" ;)
> 
> 

I believe I'll take this path, its a bit too hard for the moment, and
need several preliminary steps :

It is making sense trying to get rid of rtnl_trylock() hack with more
fine grained locks, and thus lower pressure on RTNL.

Some synchronize_rcu() calls are done whith RTNL held : All processes
hitting rtnl_trylock() have to enter a busy loop, restarting syscall as
long as the RTNL owner is blocked in synchronize_rcu().

--
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