barriers vs I/O and DMA for ia64
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- To: Tony Luck <tony.luck@xxxxxxxxx>, Fenghua Yu <fenghua.yu@xxxxxxxxx>
- Subject: barriers vs I/O and DMA for ia64
- From: Christoph Hellwig <hch@xxxxxx>
- Date: Tue, 31 Jul 2018 19:20:30 +0200
- Cc: Sinan Kaya <okaya@xxxxxxxxxxxxxx>, Arnd Bergmann <arnd@xxxxxxxx>, linux-ia64@xxxxxxxxxxxxxxx, linux-arch@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx
Hi all,
please review these patches carefully - ia64 currenly seems to be
the odd one out in terms of barrier placement for DMA and I/O and
this patch tries to resolve it. But I don't have any IA64 hardware
nor do I know the architecture to well, so don't blindly trust me.
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