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From: Dan Williams <dan.j.williams@intel.com>
To: Dexuan Cui <decui@microsoft.com>
Cc: "qi.fuli@fujitsu.com" <qi.fuli@fujitsu.com>,
	"linux-nvdimm@lists.01.org" <linux-nvdimm@lists.01.org>,
	Michael Kelley <mikelley@microsoft.com>
Subject: Re: [ndctl PATCH v2 4/4] ndctl, monitor: support NVDIMM_FAMILY_HYPERV
Date: Thu, 21 Mar 2019 23:11:46 -0700	[thread overview]
Message-ID: <CAPcyv4h4tAydacTbmZRKy7hmTqWTM22r6hD+Ucm_f3H2tQUm3g@mail.gmail.com> (raw)
In-Reply-To: <PU1P153MB01696DB78FF62FAE07473594BF430@PU1P153MB0169.APCP153.PROD.OUTLOOK.COM>

On Thu, Mar 21, 2019 at 11:03 PM Dexuan Cui <decui@microsoft.com> wrote:
>
> > From: Dan Williams <dan.j.williams@intel.com>
> > Sent: Thursday, March 21, 2019 10:37 PM
> >
> > No, I think you misunderstand. Hyper-V implements "function-1",
> > "command-1" support can be emulated. The request is to translate the
> > Hyper-V function-1 payload into the command-1 payload format.
>
> Then, yes, I think so. The first 2 patches of this patchset do the translation:
>
> [ndctl,v2,1/4] libndctl: add support for NVDIMM_FAMILY_HYPERV's _DSM Function 1
> [ndctl,v2,2/4] libndctl: NVDIMM_FAMILY_HYPERV: add .smart_get_shutdown_count (Function 2)
> (https://patchwork.kernel.org/project/linux-nvdimm/list/?series=82629)
>
> The problem is how to skip the checkings in ndctl/monitor.c: filter_dimm() on Hyper-V.
> If we return early in filter_dimm(), mfa->num_dimm will be zero, then monitor_event()
> can't be called, and we have no chance to monitor the events and do the translation.

I'd rather change ndctl_dimm_cmd_is_supported() to call back into a
dimm-op so that the Hyper-V implementation can say "yes, I support
(emulate) the necessary monitor commands".
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  reply	other threads:[~2019-03-22  6:11 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-20  5:11 [ndctl PATCH v2 4/4] ndctl, monitor: support NVDIMM_FAMILY_HYPERV Dexuan Cui
2019-02-21  8:40 ` qi.fuli
     [not found]   ` <OSBPR01MB50009900A5FE2E8588AA6367F77E0-zhdMvvdcU0ZckHoPmfvix3colHNk5qUtvxpqHgZTriW3zl9H0oFU5g@public.gmane.org>
2019-02-21 18:30     ` Dexuan Cui
2019-02-25  4:48       ` qi.fuli
     [not found]         ` <OSAPR01MB4993163079F35EEF06DFBB44F77A0-OxqQCv4d1nTzcNm8D4NKs3colHNk5qUtvxpqHgZTriW3zl9H0oFU5g@public.gmane.org>
2019-02-25  5:16           ` Dexuan Cui
2019-03-21  1:54 ` Verma, Vishal L
     [not found]   ` <9876fd8a491e339f2f41a47e2195d354bf0d5fb2.camel-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2019-03-22  2:08     ` Dexuan Cui
2019-03-22  3:31       ` Dan Williams
     [not found]       ` <PU1P153MB0169CA436F52268DD2BEF745BF430-7hHSCQUTt08p9lVGRpUb+2HfQuWdHs3hiGd9ebBGJoev3QGu/rdwKA@public.gmane.org>
2019-03-22  4:05         ` Dexuan Cui
2019-03-22  4:13           ` Dan Williams
     [not found]             ` <CAPcyv4hVZLW2OSMZ9NqqsQWMg7vxyS9J1ekDZW8G44cmD9_YCw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2019-03-22  5:09               ` Dexuan Cui
2019-03-22  5:36                 ` Dan Williams
     [not found]                   ` <CAPcyv4hM_DTcMJdWhWbtPFfVH_V-kYxXSSCg=MQZLoxVka=Mng-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2019-03-22  6:03                     ` Dexuan Cui
2019-03-22  6:11                       ` Dan Williams [this message]
     [not found]                         ` <CAPcyv4h4tAydacTbmZRKy7hmTqWTM22r6hD+Ucm_f3H2tQUm3g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2019-03-22 17:55                           ` Dexuan Cui
2019-03-22 18:03                             ` Dan Williams
     [not found]                               ` <CAPcyv4gMexBmWduqR8G=1H3gKkxbqfBADOLG595nVRipAxVukA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2019-03-22 18:09                                 ` Dexuan Cui
2019-03-22 18:28                             ` Verma, Vishal L
     [not found]                               ` <837eed30b0da59f91e5114aad97e919068a077e8.camel-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2019-03-23  4:24                                 ` Dexuan Cui

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