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From: Jerome Glisse <jglisse@redhat.com>
To: Mike Galbraith <efault@gmx.de>
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 10:31:36 -0400 (EDT)	[thread overview]
Message-ID: <474293973.18773550.1525962696189.JavaMail.zimbra@redhat.com> (raw)
In-Reply-To: <1525943427.8013.11.camel@gmx.de>

> Greetings,
> 
> When box is earning its keep, nouveau/swiotlb grumble.. a LOT.  The
> below is from master.today.
> 
> [12594.640959] nouveau 0000:01:00.0: swiotlb buffer is full (sz: 2097152
> bytes)
> [12594.693000] nouveau 0000:01:00.0: swiotlb buffer is full (sz: 2097152
> bytes)
> [12594.713787] nouveau 0000:01:00.0: swiotlb buffer is full (sz: 2097152
> bytes)
> [12594.743413] nouveau 0000:01:00.0: swiotlb buffer is full (sz: 2097152
> bytes)
> [12594.796740] nouveau 0000:01:00.0: swiotlb buffer is full (sz: 2097152
> bytes)
> [12607.000774] swiotlb_tbl_map_single: 54 callbacks suppressed
> [12607.000776] nouveau 0000:01:00.0: swiotlb buffer is full (sz: 2097152
> bytes)
> [12607.347941] nouveau 0000:01:00.0: swiotlb buffer is full (sz: 2097152
> bytes)
> [12608.677038] nouveau 0000:01:00.0: swiotlb buffer is full (sz: 2097152
> bytes)
> homer:/novell/ssh # dmesg|grep 'swiotlb buffer is full'|wc -l
> 2052
> homer:/novell/ssh # dmesg|grep 'callbacks suppressed'|wc -l
> 171
> 
> lib/swiotlb.c:
>  573 not_found:
>  574         spin_unlock_irqrestore(&io_tlb_lock, flags);
>  575         if (!(attrs & DMA_ATTR_NO_WARN) && printk_ratelimit())
>  576                 dev_warn(hwdev, "swiotlb buffer is full (sz: %zd
>  bytes)\n", size);
> 
> Does nouveau perhaps want one of those DMA_ATTR_NO_WARN thingies?
> 

Could you bisect ? I would love to point finger upstream to the DMA
folk who made changes to that API without testing with GPU.

Cheers,
Jérôme

  parent reply	other threads:[~2018-05-10 14:31 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-10  9:10 Mike Galbraith
2018-05-10 10:28 ` Mike Galbraith
2018-05-11  7:13   ` Mike Galbraith
2018-05-11 15:15     ` [patch] swiotlb: fix ignored DMA_ATTR_NO_WARN request Mike Galbraith
2018-05-12  7:11       ` Mike Galbraith
2018-05-10 14:31 ` Jerome Glisse [this message]
2018-05-10 15:31   ` [Nouveau] kernel spew from nouveau/ swiotlb Mike Galbraith
2018-05-10 16:30     ` Mike Galbraith

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