Re: mlx4_core 0000:07:00.0: swiotlb buffer is full and OOM observed during stress test on reset_controller

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Subject: Re: mlx4_core 0000:07:00.0: swiotlb buffer is full and OOM observed during stress test on reset_controller
From: Leon Romanovsky <leon@xxxxxxxxxx>
Date: Thu, 9 Mar 2017 10:42:45 +0200
Cc: Yi Zhang <yizhan@xxxxxxxxxx>, linux-nvme@xxxxxxxxxxxxxxxxxxx, linux-rdma@xxxxxxxxxxxxxxx, Sagi Grimberg <sagi@xxxxxxxxxxx>
In-reply-to: <20170308154815.GB24437@lst.de>
References: <1908657724.31179983.1488539944957.JavaMail.zimbra@redhat.com> <2013049462.31187009.1488542111040.JavaMail.zimbra@redhat.com> <20170305081206.GI14379@mtr-leonro.local> <20170308154815.GB24437@lst.de>
User-agent: Mutt/1.8.0 (2017-02-23)

On Wed, Mar 08, 2017 at 04:48:15PM +0100, Christoph Hellwig wrote:
> Why is that system using swiotlb?  mlx4 really doesn't have any
> weird addressing limits, does it?

As far as we know, there are not.

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References:
- mlx4_core 0000:07:00.0: swiotlb buffer is full and OOM observed during stress test on reset_controller
  - From: Yi Zhang
- Re: mlx4_core 0000:07:00.0: swiotlb buffer is full and OOM observed during stress test on reset_controller
  - From: Leon Romanovsky
- Re: mlx4_core 0000:07:00.0: swiotlb buffer is full and OOM observed during stress test on reset_controller
  - From: Christoph Hellwig

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