From: Boaz Harrosh <boaz@plexistor.com>
To: Christoph Hellwig <hch@lst.de>
Cc: torvalds@linux-foundation.org, axboe@kernel.dk,
linux-mips@linux-mips.org, linux-ia64@vger.kernel.org,
linux-nvdimm@ml01.01.org, dhowells@redhat.com,
sparclinux@vger.kernel.org, egtvedt@samfundet.no,
linux-arch@vger.kernel.org, linux-s390@vger.kernel.org,
x86@kernel.org, dwmw2@infradead.org, hskinnemoen@gmail.com,
linux-xtensa@linux-xtensa.org, grundler@parisc-linux.org,
realmz6@gmail.com, alex.williamson@redhat.com,
linux-metag@vger.kernel.org, monstr@monstr.eu,
linux-parisc@vger.kernel.org, vgupta@synopsys.com,
linux-kernel@vger.kernel.org, linux-alpha@vger.kernel.org,
linux-media@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: Re: RFC: prepare for struct scatterlist entries without page backing
Date: Thu, 13 Aug 2015 18:42:32 +0300 [thread overview]
Message-ID: <55CCBAE8.8090502@plexistor.com> (raw)
In-Reply-To: <20150813144036.GB17375@lst.de>
On 08/13/2015 05:40 PM, Christoph Hellwig wrote:
> On Wed, Aug 12, 2015 at 03:42:47PM +0300, Boaz Harrosh wrote:
>> The support I have suggested and submitted for zone-less sections.
>> (In my add_persistent_memory() patchset)
>>
>> Would work perfectly well and transparent for all such multimedia cases.
>> (All hacks removed). In fact I have loaded pmem (with-pages) on a VRAM
>> a few times and it is great easy fun. (I wanted to experiment with cached
>> memory over a pcie)
>
> And everyone agree that it was both buggy and incomplete.
>
What? No one ever said anything about bugs. Is the first ever I hear of it.
I was always in the notion that no one even tried it out.
I'm smoking these page-full nvidimms for more than a year. With RDMA to
pears and swap out to disks. So is not that bad I would say
> Dan has done a respin of the page backed nvdimm work with most of
> these comments addressed.
>
I would love some comments. All I got so far is silence. (And I do not
like Dan's patches comments will come next week)
> I have to say I hate both pfn-based I/O [1] and page backed nvdimms with
> passion, so we're looking into the lesser evil with an open mind.
>
> [1] not the SGL part posted here, which I think is quite sane. The bio
> side is much worse, though.
>
What can I say. I like the page-backed nvdimms. And the long term for me
is 2M pages. I hope we can sit one day soon and you explain to me whats
evil about it. I would really really like to understand
Thanks though
Boaz
next prev parent reply other threads:[~2015-08-13 15:42 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-12 7:05 RFC: prepare for struct scatterlist entries without page backing Christoph Hellwig
2015-08-12 7:05 ` [PATCH 01/31] scatterlist: add sg_pfn and sg_has_page helpers Christoph Hellwig
2015-08-12 7:05 ` [PATCH 02/31] scatterlist: use sg_phys() Christoph Hellwig
2015-08-12 7:05 ` [PATCH 03/31] dma-debug: handle page-less SG entries Christoph Hellwig
2015-08-12 7:05 ` [PATCH 04/31] x86/pci-nommu: " Christoph Hellwig
2015-08-12 7:05 ` [PATCH 05/31] x86/pci-calgary: " Christoph Hellwig
2015-08-12 7:05 ` [PATCH 06/31] alpha/pci-noop: " Christoph Hellwig
2015-08-12 7:05 ` [PATCH 07/31] alpha/pci_iommu: " Christoph Hellwig
2015-08-12 7:05 ` [PATCH 08/31] c6x: " Christoph Hellwig
2015-08-12 7:05 ` [PATCH 09/31] ia64/pci_dma: " Christoph Hellwig
2015-08-12 7:05 ` [PATCH 10/31] powerpc/iommu: " Christoph Hellwig
2015-08-12 7:05 ` [PATCH 11/31] sparc/iommu: " Christoph Hellwig
2015-08-12 7:05 ` [PATCH 12/31] mn10300: " Christoph Hellwig
2015-08-12 7:05 ` [PATCH 13/31] sparc/ldc: " Christoph Hellwig
2015-08-12 7:05 ` [PATCH 14/31] sparc32/io-unit: " Christoph Hellwig
2015-08-12 7:05 ` [PATCH 15/31] sparc32/iommu: " Christoph Hellwig
2015-08-12 7:05 ` [PATCH 16/31] s390: " Christoph Hellwig
2015-08-12 11:51 ` Sebastian Ott
2015-08-12 7:05 ` [PATCH 17/31] ia64/sba_iommu: remove sba_sg_address Christoph Hellwig
2015-08-12 7:05 ` [PATCH 18/31] nios2: handle page-less SG entries Christoph Hellwig
2015-08-12 7:05 ` [PATCH 19/31] arc: " Christoph Hellwig
2015-08-12 10:28 ` Vineet Gupta
2015-08-12 7:05 ` [PATCH 20/31] avr32: " Christoph Hellwig
2015-08-12 9:36 ` Hans-Christian Egtvedt
2015-08-12 7:05 ` [PATCH 21/31] blackfin: " Christoph Hellwig
2015-08-12 7:05 ` [PATCH 22/31] metag: " Christoph Hellwig
2015-08-12 7:05 ` [PATCH 23/31] sh: " Christoph Hellwig
2015-08-12 7:05 ` [PATCH 24/31] xtensa: " Christoph Hellwig
2015-08-12 7:05 ` [PATCH 25/31] frv: " Christoph Hellwig
2015-08-12 7:05 ` [PATCH 26/31] openrisc: " Christoph Hellwig
2015-08-12 7:05 ` [PATCH 27/31] mips: " Christoph Hellwig
2015-08-12 7:05 ` [PATCH 28/31] powerpc: " Christoph Hellwig
2015-08-12 7:05 ` [PATCH 29/31] parisc: " Christoph Hellwig
2015-08-12 16:01 ` Linus Torvalds
2015-08-13 14:31 ` Christoph Hellwig
2015-08-14 3:30 ` Dan Williams
2015-08-14 3:59 ` James Bottomley
2015-08-14 4:11 ` David Miller
2015-08-14 16:17 ` Dan Williams
2015-08-12 7:05 ` [PATCH 30/31] intel-iommu: " Christoph Hellwig
2015-08-12 9:51 ` David Woodhouse
2015-08-12 7:05 ` [PATCH 31/31] dma-mapping-common: skip kmemleak checks for " Christoph Hellwig
2015-08-12 16:05 ` Linus Torvalds
2015-08-13 14:33 ` Christoph Hellwig
2015-08-12 16:26 ` Catalin Marinas
2015-08-12 12:42 ` RFC: prepare for struct scatterlist entries without page backing Boaz Harrosh
2015-08-12 23:37 ` Julian Calaby
2015-08-13 14:35 ` Christoph Hellwig
2015-08-13 23:40 ` Julian Calaby
2015-08-13 14:40 ` Christoph Hellwig
2015-08-13 15:42 ` Boaz Harrosh [this message]
2015-08-12 17:00 ` James Bottomley
2015-08-12 17:56 ` Grant Grundler
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