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From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
To: Juergen Gross <jgross@suse.com>,
	linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org,
	netdev@vger.kernel.org
Cc: wei.liu2@citrix.com, paul.durrant@citrix.com
Subject: Re: [PATCH 0/2] xen/net: limit number of tx/rx queues
Date: Sun, 29 Jan 2017 21:55:23 -0500	[thread overview]
Message-ID: <7b27cfa9-fbda-1c05-c6f5-1519e3fce5ef@oracle.com> (raw)
In-Reply-To: <20170110133252.5346-1-jgross@suse.com>



On 01/10/2017 08:32 AM, Juergen Gross wrote:
> The Xen network frontend/backend supports multiple tx/rx queues for one
> virtual interface. The number of queues supported by the backend is
> set to the number of cpus of the backend driver domain (usually dom0)
> and the number of queues requested by the frontend is limited by the
> number of vcpus of the related guest.
>
> On large systems this can lead to ridiculous large number of queues
> exhausting the required number of grant pages rather quick.
>
> To avoid this limit the default maximum on both sides to 8. Both
> frontend and backend maximum can be individually tuned via module
> parameters.
>
> Juergen Gross (2):
>   xen/netfront: set default upper limit of tx/rx queues to 8
>   xen/netback: set default upper limit of tx/rx queues to 8
>
>  drivers/net/xen-netback/netback.c | 6 ++++--
>  drivers/net/xen-netfront.c        | 6 ++++--
>  2 files changed, 8 insertions(+), 4 deletions(-)
>

Applied to for-linus-4.11

-boris

WARNING: multiple messages have this Message-ID (diff)
From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
To: Juergen Gross <jgross@suse.com>,
	linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org,
	netdev@vger.kernel.org
Cc: paul.durrant@citrix.com, wei.liu2@citrix.com
Subject: Re: [PATCH 0/2] xen/net: limit number of tx/rx queues
Date: Sun, 29 Jan 2017 21:55:23 -0500	[thread overview]
Message-ID: <7b27cfa9-fbda-1c05-c6f5-1519e3fce5ef@oracle.com> (raw)
In-Reply-To: <20170110133252.5346-1-jgross@suse.com>



On 01/10/2017 08:32 AM, Juergen Gross wrote:
> The Xen network frontend/backend supports multiple tx/rx queues for one
> virtual interface. The number of queues supported by the backend is
> set to the number of cpus of the backend driver domain (usually dom0)
> and the number of queues requested by the frontend is limited by the
> number of vcpus of the related guest.
>
> On large systems this can lead to ridiculous large number of queues
> exhausting the required number of grant pages rather quick.
>
> To avoid this limit the default maximum on both sides to 8. Both
> frontend and backend maximum can be individually tuned via module
> parameters.
>
> Juergen Gross (2):
>   xen/netfront: set default upper limit of tx/rx queues to 8
>   xen/netback: set default upper limit of tx/rx queues to 8
>
>  drivers/net/xen-netback/netback.c | 6 ++++--
>  drivers/net/xen-netfront.c        | 6 ++++--
>  2 files changed, 8 insertions(+), 4 deletions(-)
>

Applied to for-linus-4.11

-boris

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  parent reply	other threads:[~2017-01-30  5:35 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-01-10 13:32 [PATCH 0/2] xen/net: limit number of tx/rx queues Juergen Gross
2017-01-10 13:32 ` [PATCH 1/2] xen/netfront: set default upper limit of tx/rx queues to 8 Juergen Gross
2017-01-10 14:53   ` Boris Ostrovsky
2017-01-10 14:53   ` Boris Ostrovsky
2017-01-10 15:02     ` Juergen Gross
2017-01-10 15:02     ` Juergen Gross
2017-01-10 13:32 ` Juergen Gross
2017-01-10 13:32 ` [PATCH 2/2] xen/netback: " Juergen Gross
2017-01-10 13:32 ` Juergen Gross
2017-01-10 13:54 ` [PATCH 0/2] xen/net: limit number of tx/rx queues Wei Liu
2017-01-10 13:54 ` Wei Liu
2017-01-30  2:55 ` Boris Ostrovsky [this message]
2017-01-30  2:55   ` Boris Ostrovsky
2017-01-10 13:32 Juergen Gross

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