From: Jason Wang <jasowang@redhat.com>
To: "Michael S. Tsirkin" <mst@redhat.com>, netdev@vger.kernel.org
Subject: Re: tun mq failure
Date: Wed, 23 Jan 2013 20:08:07 +0800 [thread overview]
Message-ID: <50FFD2A7.6010402@redhat.com> (raw)
In-Reply-To: <20130123110640.GC7005@order.stressinduktion.org>
On 01/23/2013 07:06 PM, Hannes Frederic Sowa wrote:
> On Wed, Jan 23, 2013 at 12:05:16PM +0200, Michael S. Tsirkin wrote:
>> This is when trying to start a VPN using some old openvpn binary so MQ
>> is not set.
>>
>> So
>> 1. I think we should limit allocation of MQ to when MQ flag is set in SETIFF.
>> 2. order 7 allocation is 2^^7 pages - about half a megabyte of contigious
>> memory. This is quite likely to fail.
>> Let's start with a small limit on number of queues, like 8?
>> Then we know it will succeed.
>> Longer term we might want to solve it differently.
> This has been come up before:
> http://thread.gmane.org/gmane.linux.network/255647/focus=255902
>
> I think a solution to this problem is still outstanding.
>
I draft a patch in the reply of in that thread, but didn't get feedback
from reporter.
next prev parent reply other threads:[~2013-01-23 12:08 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-23 10:05 tun mq failure Michael S. Tsirkin
2013-01-23 11:06 ` Hannes Frederic Sowa
2013-01-23 11:41 ` Michael S. Tsirkin
2013-01-23 12:10 ` Jason Wang
2013-01-23 13:18 ` Michael S. Tsirkin
2013-01-23 12:08 ` Jason Wang [this message]
2013-01-23 13:18 ` Michael S. Tsirkin
2013-01-23 13:20 ` Jason Wang
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