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Intel submitted a patch to the linux-nvme mailing list to support the original raid system used in the Lenovo Yoga. However, the kernel maintainers turned down

by mappu 10y ago

Intel submitted a patch to the linux-nvme mailing list to support the original raid system used in the Lenovo Yoga. However, the kernel maintainers turned down the patch because the hardware itself was bizarre, underspecified, and unreliable in common cases. This is an ongoing story and i expect there'll be a resolution in a few months. ML discussion thread is here: http://lists.infradead.org/pipermail/linux-nvme/2016-October/006800.html http://lists.infradead.org/pipermail/linux-nvme/2016-October...

voltagex_ 10y ago
I'm sure there was a post on linux-ide in the same vein. It's frustrating because my XPS 13 is also affected.
incompatible 10y ago
Is the unreliable hardware causing problems for Windows users?
- dogma1138 10y ago
  No.
- digi_owl 10y ago
  Nope, because Intel can just push some binary drivers out and everyone will down it with a gargle. The kernel patches are refused because the kernel devs expect to maintain the code for as long as there are devices in active use that need it once allowed in. Thus they demand a proper spec for the device behavior so they can test for breakages down the line. And apparently the patches are already violating AHCI behavior expected by the kernel. Or at least that is what i got out of reading the short ML thread.
revelation 10y ago
Can someone explain in greater detail what exactly Intel is trying to do here? It sounds like trying to tunnel NVMe through something that is only connected over an AHCI interface.
- userbinator 10y ago
  I'm not too familiar with this area of PC hardware, but it does seem like their AHCI controller can be configured to act like a PCI bridge with an NVMe device on the other side of it.
sengork 10y ago
I find the recruitment information page on that domain rather amusing: http://www.infradead.org/recruitment.html http://www.infradead.org/recruitment.html
- saganus 10y ago
  I read it and even tried to search for his name because apparently he has made important contributions to Linux (he links /usr/src/linux/CREDITS as his CV so...), but couldn't find anything specifically about his work. Do you happen to know what does he work/has worked on regarding Linux?
  - thewisenerd 10y ago
    He's the lead developer at LinuxMTD (http://www.linux-mtd.infradead.org/); http://www.linux-mtd.infradead.org/); (no wonder I seem to remember the "infradead" name from somewhere). More about him, here: http://www.advogato.org/person/dwmw2/ http://www.advogato.org/person/dwmw2/

by mappu 10y ago

voltagex_ 10y ago

I'm sure there was a post on linux-ide in the same vein. It's frustrating because my XPS 13 is also affected.

incompatible 10y ago

Is the unreliable hardware causing problems for Windows users?

dogma1138 10y ago
No.
digi_owl 10y ago
Nope, because Intel can just push some binary drivers out and everyone will down it with a gargle. The kernel patches are refused because the kernel devs expect to maintain the code for as long as there are devices in active use that need it once allowed in. Thus they demand a proper spec for the device behavior so they can test for breakages down the line. And apparently the patches are already violating AHCI behavior expected by the kernel. Or at least that is what i got out of reading the short ML thread.

revelation 10y ago

Can someone explain in greater detail what exactly Intel is trying to do here? It sounds like trying to tunnel NVMe through something that is only connected over an AHCI interface.

userbinator 10y ago
I'm not too familiar with this area of PC hardware, but it does seem like their AHCI controller can be configured to act like a PCI bridge with an NVMe device on the other side of it.

sengork 10y ago

I find the recruitment information page on that domain rather amusing: http://www.infradead.org/recruitment.html http://www.infradead.org/recruitment.html

saganus 10y ago
I read it and even tried to search for his name because apparently he has made important contributions to Linux (he links /usr/src/linux/CREDITS as his CV so...), but couldn't find anything specifically about his work. Do you happen to know what does he work/has worked on regarding Linux?
- thewisenerd 10y ago
  He's the lead developer at LinuxMTD (http://www.linux-mtd.infradead.org/); http://www.linux-mtd.infradead.org/); (no wonder I seem to remember the "infradead" name from somewhere). More about him, here: http://www.advogato.org/person/dwmw2/ http://www.advogato.org/person/dwmw2/