From: Paolo Bonzini <pbonzini@redhat.com>
To: Christian Borntraeger <borntraeger@de.ibm.com>,
Andy Lutomirski <luto@amacapital.net>
Cc: "linux-s390@vger.kernel.org" <linux-s390@vger.kernel.org>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Linux Virtualization <virtualization@lists.linux-foundation.org>,
"linux390@de.ibm.com" <linux390@de.ibm.com>,
virtio-dev@lists.oasis-open.org
Subject: Re: [virtio-dev] Re: [PATCH v2 0/4] virtio: Clean up scatterlists and use the DMA API
Date: Thu, 28 Aug 2014 20:55:22 +0200 [thread overview]
Message-ID: <53FF7B1A.2050307__36742.8566249602$1409252159$gmane$org@redhat.com> (raw)
In-Reply-To: <53FF751D.2040006@de.ibm.com>
Il 28/08/2014 20:29, Christian Borntraeger ha scritto:
>>> >> block seems to work, with net a simple ping works, iperf causes this:
>> >
>> > I neither see the bug, nor can I reproduce it on x86_64 on KVM. I
>> > doubt that dma vs. non-dma is relevant. I tried -net user a -net tap
>> > with iperf running in both directions. I also tried switching
>> > virtio_pci into non-DMA-API mode. No errors.
>> >
>> > Is there any chance that you could instrument that BUG_ON to print n,
>> > i, in_sgs, out_sgs, total_sg, total_in, and total_out? I assume this
>> > is some oddity with patch 1, but I'm mystified.
> Yes, its triggered by patch 1.
What version of QEMU? Can you two cat the "features" file in the
virtio-net device's sysfs directory?
Paolo
next prev parent reply other threads:[~2014-08-28 18:55 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-27 21:50 [PATCH v2 0/4] virtio: Clean up scatterlists and use the DMA API Andy Lutomirski
2014-08-27 21:50 ` [PATCH v2 1/4] virtio_ring: Remove sg_next indirection Andy Lutomirski
2014-08-27 21:50 ` [PATCH v2 2/4] virtio_ring: Support DMA APIs if requested Andy Lutomirski
2014-08-27 21:50 ` [PATCH v2 3/4] virtio_pci: Use the DMA API for virtqueues Andy Lutomirski
2014-08-27 21:50 ` [PATCH v2 4/4] virtio_net: Stop doing DMA from the stack Andy Lutomirski
2014-08-28 7:44 ` [PATCH v2 0/4] virtio: Clean up scatterlists and use the DMA API Christian Borntraeger
[not found] ` <53FEDDF5.3030903@de.ibm.com>
2014-08-28 18:06 ` Andy Lutomirski
2014-08-28 18:29 ` Christian Borntraeger
[not found] ` <53FF751D.2040006@de.ibm.com>
2014-08-28 18:51 ` Andy Lutomirski
2014-08-28 19:09 ` Christian Borntraeger
2014-08-28 18:55 ` Paolo Bonzini [this message]
[not found] ` <53FF7B1A.2050307@redhat.com>
2014-08-28 19:03 ` [virtio-dev] " Andy Lutomirski
2014-08-28 19:18 ` Christian Borntraeger
2014-08-28 21:16 ` Andy Lutomirski
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