netdev - Re: [RFC PATCH] Regression in linux 2.6.32 virtio

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: <20091217125654.GA31560@gondor.apana.org.au>
Date:	Thu, 17 Dec 2009 20:56:54 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Jarek Poplawski <jarkao2@...il.com>
Cc:	Krishna Kumar2 <krkumar2@...ibm.com>,
	"David S. Miller" <davem@...emloft.net>, mst@...hat.com,
	netdev@...r.kernel.org, Rusty Russell <rusty@...tcorp.com.au>,
	Sridhar Samudrala <sri@...ibm.com>
Subject: Re: [RFC PATCH] Regression in linux 2.6.32 virtio_net seen with
	vhost-net

On Thu, Dec 17, 2009 at 12:42:54PM +0000, Jarek Poplawski wrote:
> On Thu, Dec 17, 2009 at 05:57:15PM +0530, Krishna Kumar2 wrote:
> > the first resched. I also think the resched in requeue is probably
> > not required, since the device will call netif_tx_wake_queue anyway.

Actually, the requeue is there for the case where we hit lock
contention on the device TX lock so it is needed for that at
least.

However, for the case where the device queue is stopped you're
right we don't need to reschedule.

Cheers,
-- 
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
--
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