Re: [RFC PATCH kernel] Revert "net/mlx4_core: Set UAR page size to 4KB regardless of system page size"

From	Alexey Kardashevskiy <aik@ozlabs.ru>
Newsgroups	linux.kernel
Subject	Re: [RFC PATCH kernel] Revert "net/mlx4_core: Set UAR page size to 4KB regardless of system page size"
Date	2016-03-17 02:50 +0100
Message-ID	<rdvey-vf-3@gated-at.bofh.it> (permalink)
References	(3 earlier) <rdcbT-4l2-1@gated-at.bofh.it> <rdcvf-4sX-11@gated-at.bofh.it> <rdd7X-4Wr-5@gated-at.bofh.it> <rdf9N-6p0-45@gated-at.bofh.it> <rdgfw-7bg-7@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On 03/16/2016 08:45 PM, Or Gerlitz wrote:
> On Wed, Mar 16, 2016 at 10:34 AM, Alexey Kardashevskiy <aik@ozlabs.ru> wrote:
>
>> Oh. ok. It also looks like even with the reverted patch, mlx4 VF does not
>> work in a guest:
>
> So where is the breakage point for you? does 4.4 works? if not, what?

Ah, my bad. It is unrelated to the kernel version.

I tried passing a PF to a guest while its VFs are already passed to another 
guest and see how exactly it blows up (AER/EEH were thrown but the host 
recovered => good) but this left the device in a weird state when I could 
not use VF in a guest anymore but it seemed to keep working on the host.

It seems like the actual adapter does not reset completely when the machine 
is rebooted, I had unplug/replug power cables to fix this.

-- 
Alexey

Thread

[RFC PATCH kernel] Revert "net/mlx4_core: Set UAR page size to 4KB regardless of system page size" Alexey Kardashevskiy <aik@ozlabs.ru> - 2016-03-15 11:40 +0100
  Re: [RFC PATCH kernel] Revert "net/mlx4_core: Set UAR page size to  4KB regardless of system page size" Or Gerlitz <gerlitz.or@gmail.com> - 2016-03-15 11:50 +0100
    Re: [RFC PATCH kernel] Revert "net/mlx4_core: Set UAR page size to  4KB regardless of system page size" Christoph Hellwig <hch@infradead.org> - 2016-03-15 13:30 +0100
      Re: [RFC PATCH kernel] Revert "net/mlx4_core: Set UAR page size to  4KB regardless of system page size" Or Gerlitz <gerlitz.or@gmail.com> - 2016-03-15 15:30 +0100
        Re: [RFC PATCH kernel] Revert "net/mlx4_core: Set UAR page size to  4KB regardless of system page size" Christoph Hellwig <hch@infradead.org> - 2016-03-15 16:40 +0100
          Re: [RFC PATCH kernel] Revert "net/mlx4_core: Set UAR page size to  4KB regardless of system page size" Alexey Kardashevskiy <aik@ozlabs.ru> - 2016-03-16 03:00 +0100
    Re: [RFC PATCH kernel] Revert "net/mlx4_core: Set UAR page size to  4KB regardless of system page size" Alexey Kardashevskiy <aik@ozlabs.ru> - 2016-03-16 03:10 +0100
      Re: [RFC PATCH kernel] Revert "net/mlx4_core: Set UAR page size to  4KB regardless of system page size" Eli Cohen <eli@mellanox.com> - 2016-03-16 06:30 +0100
        Re: [RFC PATCH kernel] Revert "net/mlx4_core: Set UAR page size to  4KB regardless of system page size" Alexey Kardashevskiy <aik@ozlabs.ru> - 2016-03-16 06:50 +0100
          Re: [RFC PATCH kernel] Revert "net/mlx4_core: Set UAR page size to  4KB regardless of system page size" Eli Cohen <eli@mellanox.com> - 2016-03-16 07:30 +0100
            Re: [RFC PATCH kernel] Revert "net/mlx4_core: Set UAR page size to  4KB regardless of system page size" Alexey Kardashevskiy <aik@ozlabs.ru> - 2016-03-16 09:40 +0100
              Re: [RFC PATCH kernel] Revert "net/mlx4_core: Set UAR page size to  4KB regardless of system page size" Or Gerlitz <gerlitz.or@gmail.com> - 2016-03-16 10:50 +0100
                Re: [RFC PATCH kernel] Revert "net/mlx4_core: Set UAR page size to  4KB regardless of system page size" Alexey Kardashevskiy <aik@ozlabs.ru> - 2016-03-17 02:50 +0100
                Re: [RFC PATCH kernel] Revert "net/mlx4_core: Set UAR page size to  4KB regardless of system page size" Or Gerlitz <gerlitz.or@gmail.com> - 2016-03-17 06:10 +0100

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