netdev - [PATCH] bonding: various fixes for bonding, netpoll & netconsole (v2)

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-next>] [day] [month] [year] [list]

Date:	Wed, 13 Oct 2010 08:35:29 -0400
From:	nhorman@...driver.com
To:	netdev@...r.kernel.org
Cc:	bonding-devel@...ts.sourceforge.net, fubar@...ibm.com,
	davem@...emloft.net, andy@...yhouse.net, amwang@...hat.com,
	nhorman@...driver.com
Subject: [PATCH] bonding: various fixes for bonding, netpoll & netconsole (v2)

Version 2, taking teh following changes into account:

1) Moved tx blocking/checking macros to netpoll.h as suggested by amwang

2) Added tx blocking macro calls to sysfs paths, as they can deadlock in the
same way that the link monitoring paths can.

Summary: 
A while ago we tried to enable netpoll on the bonding driver to enable
netconsole.  That worked well in a steady state, but deadlocked frequently in
failover conditions due to some recursive lock-taking (as well as a few other
problems).  I've gone through the driver, netconsole and netpoll code, fixed up
those deadlocks, and confirmed that, with this patch series, we can use
netconsole on bonding without deadlock in all bonding modes with all slaves,
even accross failovers.  I've also fixed up some incidental bugs that I ran
across while looking through this code, as described in individual patches

Signed-off-by: Neil Horman <nhorman@...driver.com>
--
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