Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1206928

Re: RFC: prepare for struct scatterlist entries without page backing

Show all headers | View raw

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

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

RFC: prepare for struct scatterlist entries without page backing Christoph Hellwig <hch@lst.de> - 2015-08-12 09:20 +0200
  [PATCH 22/31] metag: handle page-less SG entries Christoph Hellwig <hch@lst.de> - 2015-08-12 09:20 +0200
  [PATCH 07/31] alpha/pci_iommu: handle page-less SG entries Christoph Hellwig <hch@lst.de> - 2015-08-12 09:20 +0200
  [PATCH 28/31] powerpc: handle page-less SG entries Christoph Hellwig <hch@lst.de> - 2015-08-12 09:20 +0200
  [PATCH 23/31] sh: handle page-less SG entries Christoph Hellwig <hch@lst.de> - 2015-08-12 09:20 +0200
  [PATCH 16/31] s390: handle page-less SG entries Christoph Hellwig <hch@lst.de> - 2015-08-12 09:20 +0200
    Re: [PATCH 16/31] s390: handle page-less SG entries Sebastian Ott <sebott@linux.vnet.ibm.com> - 2015-08-12 14:00 +0200
  [PATCH 11/31] sparc/iommu: handle page-less SG entries Christoph Hellwig <hch@lst.de> - 2015-08-12 09:20 +0200
  [PATCH 03/31] dma-debug: handle page-less SG entries Christoph Hellwig <hch@lst.de> - 2015-08-12 09:30 +0200
  [PATCH 06/31] alpha/pci-noop: handle page-less SG entries Christoph Hellwig <hch@lst.de> - 2015-08-12 09:30 +0200
  [PATCH 02/31] scatterlist: use sg_phys() Christoph Hellwig <hch@lst.de> - 2015-08-12 09:30 +0200
  [PATCH 01/31] scatterlist: add sg_pfn and sg_has_page helpers Christoph Hellwig <hch@lst.de> - 2015-08-12 09:30 +0200
  Re: RFC: prepare for struct scatterlist entries without page backing Boaz Harrosh <boaz@plexistor.com> - 2015-08-12 14:50 +0200
    Re: RFC: prepare for struct scatterlist entries without page backing Julian Calaby <julian.calaby@gmail.com> - 2015-08-13 01:40 +0200
      Re: RFC: prepare for struct scatterlist entries without page  backing Christoph Hellwig <hch@lst.de> - 2015-08-13 16:40 +0200
        Re: RFC: prepare for struct scatterlist entries without page backing Julian Calaby <julian.calaby@gmail.com> - 2015-08-14 01:50 +0200
    Re: RFC: prepare for struct scatterlist entries without page  backing Christoph Hellwig <hch@lst.de> - 2015-08-13 16:50 +0200
      Re: RFC: prepare for struct scatterlist entries without page backing Boaz Harrosh <boaz@plexistor.com> - 2015-08-13 17:50 +0200
  Re: RFC: prepare for struct scatterlist entries without page backing James Bottomley <James.Bottomley@HansenPartnership.com> - 2015-08-12 19:10 +0200
    Re: RFC: prepare for struct scatterlist entries without page backing Grant Grundler <grantgrundler@gmail.com> - 2015-08-12 20:00 +0200

csiph-web