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From: Mike Galbraith <efault@gmx.de>
To: nouveau <nouveau@lists.freedesktop.org>
Cc: LKML <linux-kernel@vger.kernel.org>, Ben Skeggs <bskeggs@redhat.com>
Subject: kernel spew from nouveau/ swiotlb
Date: Thu, 10 May 2018 11:10:27 +0200	[thread overview]
Message-ID: <1525943427.8013.11.camel@gmx.de> (raw)

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?

	-Mike

             reply	other threads:[~2018-05-10  9:10 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-10  9:10 Mike Galbraith [this message]
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 ` [Nouveau] kernel spew from nouveau/ swiotlb Jerome Glisse
2018-05-10 15:31   ` Mike Galbraith
2018-05-10 16:30     ` Mike Galbraith

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