netdev - Re: [net 1/1] i40e: Do not enable NAPI on q

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: <20170324.192907.2169002295728740570.davem@davemloft.net>
Date:   Fri, 24 Mar 2017 19:29:07 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     jeffrey.t.kirsher@...el.com
Cc:     alexander.h.duyck@...el.com, netdev@...r.kernel.org,
        nhorman@...hat.com, sassmann@...hat.com, jogreene@...hat.com
Subject: Re: [net 1/1] i40e: Do not enable NAPI on q_vectors that have no
 rings

From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Date: Fri, 24 Mar 2017 15:01:42 -0700

> From: Alexander Duyck <alexander.h.duyck@...el.com>
> 
> When testing the epoll w/ busy poll code I found that I could get into a
> state where the i40e driver had q_vectors w/ active NAPI that had no rings.
> This was resulting in a divide by zero error.  To correct it I am updating
> the driver code so that we only support NAPI on q_vectors that have 1 or
> more rings allocated to them.
> 
> Signed-off-by: Alexander Duyck <alexander.h.duyck@...el.com>
> Tested-by: Andrew Bowers <andrewx.bowers@...el.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>

Applied, thanks.