From: hch@infradead.org (Christoph Hellwig)
Subject: kernel BUG at nvme/host/pci.c
Date: Sat, 15 Jul 2017 01:51:41 -0700 [thread overview]
Message-ID: <20170715085141.GC25753@infradead.org> (raw)
In-Reply-To: <20170714170846.GA24365@localhost.localdomain>
On Fri, Jul 14, 2017@01:08:47PM -0400, Keith Busch wrote:
> > So LVM2 backed by md raid1 isn't compatible with newer hardware... Any
> > suggestions?
>
> It's not that LVM2 or RAID isn't compatible. Either the IOMMU isn't
> compatible if can use different page offsets for DMA addresses than the
> physical aaddresses, or the driver for it is broken. The DMA addresses
> in this mapped SGL look completely broken, at least, since the last 4
> entries are all the same address. That'll corrupt data.
Given that this is a Xen system I wonder if swiotlb-xen is involved
here, which does some odd chunking of dma translations?
>
> _______________________________________________
> Linux-nvme mailing list
> Linux-nvme at lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-nvme
---end quoted text---
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@infradead.org>
To: Keith Busch <keith.busch@intel.com>
Cc: xen-devel@lists.xenproject.org,
Andreas Pflug <pgadmin@pse-consulting.de>,
linux-nvme@lists.infradead.org
Subject: Re: kernel BUG at nvme/host/pci.c
Date: Sat, 15 Jul 2017 01:51:41 -0700 [thread overview]
Message-ID: <20170715085141.GC25753@infradead.org> (raw)
In-Reply-To: <20170714170846.GA24365@localhost.localdomain>
On Fri, Jul 14, 2017 at 01:08:47PM -0400, Keith Busch wrote:
> > So LVM2 backed by md raid1 isn't compatible with newer hardware... Any
> > suggestions?
>
> It's not that LVM2 or RAID isn't compatible. Either the IOMMU isn't
> compatible if can use different page offsets for DMA addresses than the
> physical aaddresses, or the driver for it is broken. The DMA addresses
> in this mapped SGL look completely broken, at least, since the last 4
> entries are all the same address. That'll corrupt data.
Given that this is a Xen system I wonder if swiotlb-xen is involved
here, which does some odd chunking of dma translations?
>
> _______________________________________________
> Linux-nvme mailing list
> Linux-nvme@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-nvme
---end quoted text---
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next prev parent reply other threads:[~2017-07-15 8:51 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-10 18:03 kernel BUG at nvme/host/pci.c Andreas Pflug
2017-07-10 19:08 ` Keith Busch
2017-07-11 7:44 ` Andreas Pflug
2017-07-11 19:45 ` Keith Busch
2017-07-11 19:44 ` Scott Bauer
2017-07-12 6:06 ` Andreas Pflug
2017-07-12 19:50 ` Keith Busch
2017-07-13 8:46 ` Andreas Pflug
2017-07-13 9:00 ` Sagi Grimberg
2017-07-13 13:47 ` Keith Busch
2017-07-14 16:47 ` Andreas Pflug
2017-07-14 17:08 ` Keith Busch
2017-07-15 8:51 ` Christoph Hellwig [this message]
2017-07-15 8:51 ` Christoph Hellwig
2017-07-15 13:34 ` Andreas Pflug
2017-07-15 13:34 ` Andreas Pflug
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