netdev - Re: [PATCH v4 0/10] skb paged fragment destructors

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]

Message-ID: <20120410145845.GF19556@redhat.com>
Date:	Tue, 10 Apr 2012 17:58:47 +0300
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Ian Campbell <Ian.Campbell@...rix.com>
Cc:	netdev@...r.kernel.org, David Miller <davem@...emloft.net>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Wei Liu <wei.liu2@...rix.com>,
	David VomLehn <dvomlehn@...co.com>,
	Bart Van Assche <bvanassche@....org>,
	xen-devel <xen-devel@...ts.xen.org>
Subject: Re: [PATCH v4 0/10] skb paged fragment destructors

On Tue, Apr 10, 2012 at 03:26:05PM +0100, Ian Campbell wrote:
>               * I can't for the life of me get anything to actually hit
>                 this code path. I've been trying with an NFS server
>                 running in a Xen HVM domain with emulated (e.g. tap)
>                 networking and a client in domain 0, using the NFS fix
>                 in this series which generates SKBs with destructors
>                 set, so far -- nothing. I suspect that lack of TSO/GSO
>                 etc on the TAP interface is causing the frags to be
>                 copied to normal pages during skb_segment().

To enable gso you need to call TUNSETOFFLOAD.

-- 
MST
--
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