netdev - Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts

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:	Sun, 24 May 2009 23:15:57 +0200
From:	Francois Romieu <romieu@...zoreil.com>
To:	David Dillow <dave@...dillows.org>
Cc:	Michael Riepe <michael.riepe@...glemail.com>,
	Michael Buesch <mb@...sch.de>,
	Rui Santos <rsantos@...popie.com>,
	Michael Büker <m.bueker@...lin.de>,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts

David Dillow <dave@...dillows.org> :
[...]
> This fixes the lockups I've seen. Both MSI and level-triggered interrupt
> configurations survive over an hour of testing when it would lockup in
> under 90 seconds before. I am certain of the analysis of the root cause,
> but there may be better ways to fix it. There may also be a theoretical
> race window between the ending of a NAPI poll cycle and a link change
> interrupt coming in, but I'm not sure it would matter. 

It makes sense.

If I understand correctly, one should expect to find some pending Tx
event in the ISR of a failed card when reading the registers with
ethtool.

Has someone noticed it ?

-- 
Ueimor
--
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