From: Mike Galbraith <efault-Mmb7MZpHnFY@public.gmane.org>
To: Jerome Glisse <jglisse-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: nouveau
<nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org>,
LKML <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Ben Skeggs <bskeggs-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Subject: Re: kernel spew from nouveau/ swiotlb
Date: Thu, 10 May 2018 17:31:20 +0200 [thread overview]
Message-ID: <1525966280.5207.1.camel@gmx.de> (raw)
In-Reply-To: <474293973.18773550.1525962696189.JavaMail.zimbra-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
On Thu, 2018-05-10 at 10:31 -0400, Jerome Glisse wrote:
>
> Could you bisect ? I would love to point finger upstream to the DMA
> folk who made changes to that API without testing with GPU.
Rummaging a bit, it might be...
nouveau_bo_new()
...
ttm_dma_pool_alloc_new_pages()
dma_alloc_attrs()
ops->alloc() == x86_swiotlb_alloc_coherent()
x86_swiotlb_alloc_coherent() flags |= __GFP_NOWARN;
swiotlb_alloc_coherent(..flags)
swiotlb_alloc_coherent(..flags) attrs = (flags & __GFP_NOWARN) ? DMA_ATTR_NO_WARN : 0;
swiotlb_alloc_buffer(..attr)
swiotlb_alloc_buffer(..0) <== hm, pass zero instead of attr?
swiotlb_tbl_map_single() gripeage
...that?
-Mike
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WARNING: multiple messages have this Message-ID (diff)
From: Mike Galbraith <efault@gmx.de>
To: Jerome Glisse <jglisse@redhat.com>
Cc: nouveau <nouveau@lists.freedesktop.org>,
LKML <linux-kernel@vger.kernel.org>,
Ben Skeggs <bskeggs@redhat.com>
Subject: Re: [Nouveau] kernel spew from nouveau/ swiotlb
Date: Thu, 10 May 2018 17:31:20 +0200 [thread overview]
Message-ID: <1525966280.5207.1.camel@gmx.de> (raw)
In-Reply-To: <474293973.18773550.1525962696189.JavaMail.zimbra@redhat.com>
On Thu, 2018-05-10 at 10:31 -0400, Jerome Glisse wrote:
>
> Could you bisect ? I would love to point finger upstream to the DMA
> folk who made changes to that API without testing with GPU.
Rummaging a bit, it might be...
nouveau_bo_new()
...
ttm_dma_pool_alloc_new_pages()
dma_alloc_attrs()
ops->alloc() == x86_swiotlb_alloc_coherent()
x86_swiotlb_alloc_coherent() flags |= __GFP_NOWARN;
swiotlb_alloc_coherent(..flags)
swiotlb_alloc_coherent(..flags) attrs = (flags & __GFP_NOWARN) ? DMA_ATTR_NO_WARN : 0;
swiotlb_alloc_buffer(..attr)
swiotlb_alloc_buffer(..0) <== hm, pass zero instead of attr?
swiotlb_tbl_map_single() gripeage
...that?
-Mike
next prev parent reply other threads:[~2018-05-10 15:31 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-10 9:10 kernel spew from nouveau/ swiotlb Mike Galbraith
2018-05-10 9:10 ` Mike Galbraith
[not found] ` <1525943427.8013.11.camel-Mmb7MZpHnFY@public.gmane.org>
2018-05-10 10:28 ` Mike Galbraith
2018-05-10 10:28 ` Mike Galbraith
[not found] ` <1525948096.29445.4.camel-Mmb7MZpHnFY@public.gmane.org>
2018-05-11 7:13 ` Mike Galbraith
2018-05-11 7:13 ` Mike Galbraith
[not found] ` <1526022830.6288.3.camel-Mmb7MZpHnFY@public.gmane.org>
2018-05-11 15:15 ` [patch] swiotlb: fix ignored DMA_ATTR_NO_WARN request Mike Galbraith
2018-05-11 15:15 ` Mike Galbraith
[not found] ` <1526051730.23162.3.camel-Mmb7MZpHnFY@public.gmane.org>
2018-05-12 7:11 ` Mike Galbraith
2018-05-12 7:11 ` Mike Galbraith
2018-05-10 14:31 ` kernel spew from nouveau/ swiotlb Jerome Glisse
2018-05-10 14:31 ` [Nouveau] " Jerome Glisse
[not found] ` <474293973.18773550.1525962696189.JavaMail.zimbra-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2018-05-10 15:31 ` Mike Galbraith [this message]
2018-05-10 15:31 ` Mike Galbraith
2018-05-10 16:30 ` Mike Galbraith
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