From: David Miller <davem@davemloft.net>
To: mst@redhat.com
Cc: rusty@rustcorp.com.au, netdev@vger.kernel.org, tj@kernel.org
Subject: Re: [PATCH] virtio_net: use non-reentrant workqueue.
Date: Thu, 29 Dec 2011 16:44:58 -0500 (EST) [thread overview]
Message-ID: <20111229.164458.285201500999170488.davem@davemloft.net> (raw)
In-Reply-To: <20111229203314.GB5051@redhat.com>
From: "Michael S. Tsirkin" <mst@redhat.com>
Date: Thu, 29 Dec 2011 22:33:14 +0200
> On Thu, Dec 29, 2011 at 01:55:47PM +1030, Rusty Russell wrote:
>> Michael S. Tsirkin also noticed that we could run the refill work
>> multiple CPUs: if we kick off a refill on one CPU and then on another,
>> they would both manipulate the queue at the same time (they use
>> napi_disable to avoid racing against the receive handler itself).
>>
>> Tejun points out that this is what the WQ_NON_REENTRANT flag is for,
>> and that there is a convenient system kthread we can use.
>>
>> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
>
> Acked-by: Michael S. Tsirkin <mst@redhat.com>
Applied.
prev parent reply other threads:[~2011-12-29 21:45 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <87ehvogitg.fsf@rustcorp.com.au>
2011-12-29 10:43 ` [PATCH] virtio_net: use non-reentrant workqueue Rusty Russell
2011-12-29 20:33 ` Michael S. Tsirkin
2011-12-29 21:44 ` David Miller [this message]
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