From: nacc@linux.vnet.ibm.com (Nishanth Aravamudan)
Subject: [PATCH 0/5 v3] Fix NVMe driver support on Power with 32-bit DMA
Date: Fri, 30 Oct 2015 14:35:46 -0700 [thread overview]
Message-ID: <20151030213546.GL7716@linux.vnet.ibm.com> (raw)
In-Reply-To: <20151029.184955.728736673434401711.davem@davemloft.net>
On 29.10.2015 [18:49:55 -0700], David Miller wrote:
> From: Nishanth Aravamudan <nacc at linux.vnet.ibm.com>
> Date: Thu, 29 Oct 2015 08:57:01 -0700
>
> > So, would that imply changing just the NVMe driver code rather than
> > adding the dma_page_shift API at all? What about
> > architectures that can support the larger page sizes? There is an
> > implied performance impact, at least, of shifting the IO size down.
> >
> > Sorry for the continuing questions -- I got lots of conflicting feedback
> > on the last series and want to make sure v4 is more acceptable.
>
> In the long term I would be very happy to see us having a real interface
> for this stuff, just my opinion...
Yep, I think I'll try and balance the two -- fix NVMe for now with a 4K
page size as suggested by Christoph, and then work on the more complete
API for the next merge.
Thanks,
Nish
WARNING: multiple messages have this Message-ID (diff)
From: Nishanth Aravamudan <nacc@linux.vnet.ibm.com>
To: David Miller <davem@davemloft.net>
Cc: hch@infradead.org, keith.busch@intel.com, aik@ozlabs.ru,
linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org,
paulus@samba.org, sparclinux@vger.kernel.org,
willy@linux.intel.com, linuxppc-dev@lists.ozlabs.org,
david@gibson.dropbear.id.au
Subject: Re: [PATCH 0/5 v3] Fix NVMe driver support on Power with 32-bit DMA
Date: Fri, 30 Oct 2015 14:35:46 -0700 [thread overview]
Message-ID: <20151030213546.GL7716@linux.vnet.ibm.com> (raw)
In-Reply-To: <20151029.184955.728736673434401711.davem@davemloft.net>
On 29.10.2015 [18:49:55 -0700], David Miller wrote:
> From: Nishanth Aravamudan <nacc@linux.vnet.ibm.com>
> Date: Thu, 29 Oct 2015 08:57:01 -0700
>
> > So, would that imply changing just the NVMe driver code rather than
> > adding the dma_page_shift API at all? What about
> > architectures that can support the larger page sizes? There is an
> > implied performance impact, at least, of shifting the IO size down.
> >
> > Sorry for the continuing questions -- I got lots of conflicting feedback
> > on the last series and want to make sure v4 is more acceptable.
>
> In the long term I would be very happy to see us having a real interface
> for this stuff, just my opinion...
Yep, I think I'll try and balance the two -- fix NVMe for now with a 4K
page size as suggested by Christoph, and then work on the more complete
API for the next merge.
Thanks,
Nish
WARNING: multiple messages have this Message-ID (diff)
From: Nishanth Aravamudan <nacc@linux.vnet.ibm.com>
To: sparclinux@vger.kernel.org
Subject: Re: [PATCH 0/5 v3] Fix NVMe driver support on Power with 32-bit DMA
Date: Fri, 30 Oct 2015 21:35:46 +0000 [thread overview]
Message-ID: <20151030213546.GL7716@linux.vnet.ibm.com> (raw)
In-Reply-To: <20151029.184955.728736673434401711.davem@davemloft.net>
On 29.10.2015 [18:49:55 -0700], David Miller wrote:
> From: Nishanth Aravamudan <nacc@linux.vnet.ibm.com>
> Date: Thu, 29 Oct 2015 08:57:01 -0700
>
> > So, would that imply changing just the NVMe driver code rather than
> > adding the dma_page_shift API at all? What about
> > architectures that can support the larger page sizes? There is an
> > implied performance impact, at least, of shifting the IO size down.
> >
> > Sorry for the continuing questions -- I got lots of conflicting feedback
> > on the last series and want to make sure v4 is more acceptable.
>
> In the long term I would be very happy to see us having a real interface
> for this stuff, just my opinion...
Yep, I think I'll try and balance the two -- fix NVMe for now with a 4K
page size as suggested by Christoph, and then work on the more complete
API for the next merge.
Thanks,
Nish
next prev parent reply other threads:[~2015-10-30 21:35 UTC|newest]
Thread overview: 147+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-23 20:54 [PATCH 0/5 v3] Fix NVMe driver support on Power with 32-bit DMA Nishanth Aravamudan
2015-10-23 20:54 ` Nishanth Aravamudan
2015-10-23 20:54 ` Nishanth Aravamudan
2015-10-23 20:56 ` [PATCH 1/7 v3] dma-mapping: add generic dma_get_page_shift API Nishanth Aravamudan
2015-10-23 20:56 ` Nishanth Aravamudan
2015-10-23 20:56 ` Nishanth Aravamudan
2015-10-23 20:57 ` [PATCH 2/7 v2] powerpc/dma-mapping: override dma_get_page_shift Nishanth Aravamudan
2015-10-23 20:57 ` Nishanth Aravamudan
2015-10-23 20:57 ` Nishanth Aravamudan
2015-10-27 6:02 ` Alexey Kardashevskiy
2015-10-27 6:02 ` Alexey Kardashevskiy
2015-10-27 6:02 ` Alexey Kardashevskiy
2015-10-27 14:06 ` Busch, Keith
2015-10-27 14:06 ` Busch, Keith
2015-10-27 14:06 ` Busch, Keith
2015-10-27 22:27 ` Nishanth Aravamudan
2015-10-27 22:27 ` Nishanth Aravamudan
2015-10-27 22:27 ` Nishanth Aravamudan
2015-10-28 1:00 ` Alexey Kardashevskiy
2015-10-28 1:00 ` Alexey Kardashevskiy
2015-10-28 1:00 ` Alexey Kardashevskiy
2015-10-28 1:54 ` Nishanth Aravamudan
2015-10-28 1:54 ` Nishanth Aravamudan
2015-10-28 1:54 ` Nishanth Aravamudan
2015-10-28 2:20 ` Benjamin Herrenschmidt
2015-10-28 2:20 ` Benjamin Herrenschmidt
2015-10-28 2:20 ` Benjamin Herrenschmidt
2015-10-28 2:30 ` Nishanth Aravamudan
2015-10-28 2:30 ` Nishanth Aravamudan
2015-10-28 2:30 ` Nishanth Aravamudan
2015-10-28 3:20 ` Benjamin Herrenschmidt
2015-10-28 3:20 ` Benjamin Herrenschmidt
2015-10-28 3:20 ` Benjamin Herrenschmidt
2015-10-23 20:57 ` [PATCH 0/5 v3] Fix NVMe driver support on Power with 32-bit DMA Nishanth Aravamudan
2015-10-23 20:57 ` Nishanth Aravamudan
2015-10-23 20:57 ` Nishanth Aravamudan
2015-10-23 20:58 ` [PATCH 3/7 v2] powerpc/dma: implement per-platform dma_get_page_shift Nishanth Aravamudan
2015-10-23 20:58 ` Nishanth Aravamudan
2015-10-23 20:58 ` Nishanth Aravamudan
2015-10-23 20:59 ` [PATCH 4/7 v2] pseries/iommu: implement DDW-aware dma_get_page_shift Nishanth Aravamudan
2015-10-23 20:59 ` Nishanth Aravamudan
2015-10-23 20:59 ` Nishanth Aravamudan
2015-10-27 5:56 ` Alexey Kardashevskiy
2015-10-27 5:56 ` Alexey Kardashevskiy
2015-10-27 5:56 ` Alexey Kardashevskiy
2015-10-27 22:22 ` Nishanth Aravamudan
2015-10-27 22:22 ` Nishanth Aravamudan
2015-10-27 22:22 ` Nishanth Aravamudan
2015-10-23 21:00 ` [PATCH 5/7] [RFC PATCH 5/7] sparc: rename kernel/iommu_common.h -> include/asm/iommu_common.h Nishanth Aravamudan
2015-10-23 21:00 ` Nishanth Aravamudan
2015-10-23 21:00 ` Nishanth Aravamudan
2015-10-23 21:02 ` Nishanth Aravamudan
2015-10-23 21:02 ` Nishanth Aravamudan
2015-10-23 21:02 ` Nishanth Aravamudan
2015-10-23 21:01 ` [RFC PATCH 6/7] sparc/dma-mapping: override dma_get_page_shift Nishanth Aravamudan
2015-10-23 21:01 ` Nishanth Aravamudan
2015-10-23 21:01 ` Nishanth Aravamudan
2015-10-23 21:02 ` [PATCH 7/7 v2] drivers/nvme: default to the IOMMU page size Nishanth Aravamudan
2015-10-23 21:02 ` Nishanth Aravamudan
2015-10-23 21:02 ` Nishanth Aravamudan
2015-10-27 1:27 ` [PATCH 0/5 v3] Fix NVMe driver support on Power with 32-bit DMA David Miller
2015-10-27 1:27 ` David Miller
2015-10-27 1:27 ` David Miller
2015-10-27 22:20 ` Nishanth Aravamudan
2015-10-27 22:20 ` Nishanth Aravamudan
2015-10-27 22:20 ` Nishanth Aravamudan
2015-10-27 22:36 ` Busch, Keith
2015-10-27 22:36 ` Busch, Keith
2015-10-27 22:36 ` Busch, Keith
2015-10-28 0:54 ` David Miller
2015-10-28 0:54 ` David Miller
2015-10-28 0:54 ` David Miller
2015-10-28 13:59 ` Busch, Keith
2015-10-28 13:59 ` Busch, Keith
2015-10-28 13:59 ` Busch, Keith
2015-10-29 11:55 ` Christoph Hellwig
2015-10-29 11:55 ` Christoph Hellwig
2015-10-29 11:55 ` Christoph Hellwig
2015-10-29 15:57 ` Nishanth Aravamudan
2015-10-29 15:57 ` Nishanth Aravamudan
2015-10-29 15:57 ` Nishanth Aravamudan
2015-10-29 17:20 ` Busch, Keith
2015-10-29 17:20 ` Busch, Keith
2015-10-29 17:20 ` Busch, Keith
2015-10-30 21:35 ` [PATCH 1/1 v3] drivers/nvme: default to 4k device page size Nishanth Aravamudan
2015-10-30 21:35 ` Nishanth Aravamudan
2015-10-30 21:35 ` Nishanth Aravamudan
2015-10-30 21:48 ` Keith Busch
2015-10-30 21:48 ` Keith Busch
2015-10-30 21:48 ` Keith Busch
2015-10-30 22:13 ` Nishanth Aravamudan
2015-10-30 22:13 ` Nishanth Aravamudan
2015-10-30 22:13 ` Nishanth Aravamudan
2015-11-03 13:18 ` Christoph Hellwig
2015-11-03 13:18 ` Christoph Hellwig
2015-11-03 13:18 ` Christoph Hellwig
2015-11-03 13:46 ` Keith Busch
2015-11-03 13:46 ` Keith Busch
2015-11-03 13:46 ` Keith Busch
2015-11-05 17:01 ` [PATCH 1/1 v4] " Nishanth Aravamudan
2015-11-05 17:01 ` Nishanth Aravamudan
2015-11-05 17:01 ` Nishanth Aravamudan
2015-11-05 19:58 ` Christoph Hellwig
2015-11-05 19:58 ` Christoph Hellwig
2015-11-05 19:58 ` Christoph Hellwig
2015-11-05 21:54 ` Nishanth Aravamudan
2015-11-05 21:54 ` Nishanth Aravamudan
2015-11-05 21:54 ` Nishanth Aravamudan
2015-11-06 16:13 ` Nishanth Aravamudan
2015-11-06 16:13 ` Nishanth Aravamudan
2015-11-06 16:13 ` Nishanth Aravamudan
2015-11-13 7:37 ` Christoph Hellwig
2015-11-13 7:37 ` Christoph Hellwig
2015-11-13 7:37 ` Christoph Hellwig
2015-11-13 15:08 ` Keith Busch
2015-11-13 15:08 ` Keith Busch
2015-11-13 15:08 ` Keith Busch
2015-11-18 14:42 ` Christoph Hellwig
2015-11-18 14:42 ` Christoph Hellwig
2015-11-18 14:42 ` Christoph Hellwig
2015-10-30 1:49 ` [PATCH 0/5 v3] Fix NVMe driver support on Power with 32-bit DMA David Miller
2015-10-30 1:49 ` David Miller
2015-10-30 1:49 ` David Miller
2015-10-30 21:35 ` Nishanth Aravamudan [this message]
2015-10-30 21:35 ` Nishanth Aravamudan
2015-10-30 21:35 ` Nishanth Aravamudan
2015-10-27 22:57 ` Julian Calaby
2015-10-27 22:57 ` Julian Calaby
2015-10-27 22:57 ` Julian Calaby
2015-10-27 23:40 ` Nishanth Aravamudan
2015-10-27 23:40 ` Nishanth Aravamudan
2015-10-27 23:40 ` Nishanth Aravamudan
2015-10-27 23:43 ` Julian Calaby
2015-10-27 23:43 ` Julian Calaby
2015-10-27 23:43 ` Julian Calaby
2015-10-28 0:29 ` Benjamin Herrenschmidt
2015-10-28 0:29 ` Benjamin Herrenschmidt
2015-10-28 0:29 ` Benjamin Herrenschmidt
2015-10-28 0:43 ` David Miller
2015-10-28 1:00 ` David Miller
2015-10-28 1:00 ` David Miller
2015-10-28 0:53 ` David Miller
2015-10-28 0:53 ` David Miller
2015-10-28 0:53 ` David Miller
2015-10-28 1:52 ` Nishanth Aravamudan
2015-10-28 1:52 ` Nishanth Aravamudan
2015-10-28 1:52 ` Nishanth Aravamudan
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