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From: Wendy Cheng <s.wendy.cheng-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: Tom Talpey <tom-CLs1Zie5N5HQT0dZR+AlfA@public.gmane.org>
Cc: Chuck Lever <chuck.lever-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>,
	"linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
	<linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	Linux NFS Mailing List
	<linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	Shirley Ma <shirley.ma-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
Subject: Re: Proposal for simplifying NFS/RDMA client memory registration
Date: Fri, 28 Feb 2014 14:26:37 -0800	[thread overview]
Message-ID: <CABgxfbHg0B02c2zpYdCB4pUZZhhA4aKRuyh4Kx=NE1yAisFLLQ@mail.gmail.com> (raw)
In-Reply-To: <CABgxfbHwo13ma=-Xn+S36WwD8LVNLdw6UHztFe8EkCA_=NBenw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>

On Fri, Feb 28, 2014 at 2:20 PM, Wendy Cheng <s.wendy.cheng-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> ni i...On Fri, Feb 28, 2014 at 1:41 PM, Tom Talpey <tom-CLs1Zie5N5HQT0dZR+AlfA@public.gmane.org> wrote:
>>
>> On 2/26/2014 8:44 AM, Chuck Lever wrote:
>>>
>>> Hi-
>>>
>>> Shirley Ma and I are reviving work on the NFS/RDMA client code base in
>>> the Linux kernel.  So far we've built and run functional tests to determine
>>> what is working and what is broken.
>>>
>>> [snip]
>
>
>>>
>>> ALLPHYSICAL - Usually fast, but not safe as it exposes client memory.
>>> All HCAs support this mode.
>>
>>
>> Not safe is an understatement. It exposes all of client physical
>> memory to the peer, for both read and write. A simple pointer error
>> on the server will silently corrupt the client. This mode was
>> intended only for testing, and in experimental deployments.

(sorry, resend .. previous reply bounced back due to gmail html format)

Please keep "ALLPHYSICAL" for now  - as our embedded system needs it.

Thanks,
Wendy
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WARNING: multiple messages have this Message-ID (diff)
From: Wendy Cheng <s.wendy.cheng@gmail.com>
To: Tom Talpey <tom@talpey.com>
Cc: Chuck Lever <chuck.lever@oracle.com>,
	"linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>,
	Linux NFS Mailing List <linux-nfs@vger.kernel.org>,
	Shirley Ma <shirley.ma@oracle.com>
Subject: Re: Proposal for simplifying NFS/RDMA client memory registration
Date: Fri, 28 Feb 2014 14:26:37 -0800	[thread overview]
Message-ID: <CABgxfbHg0B02c2zpYdCB4pUZZhhA4aKRuyh4Kx=NE1yAisFLLQ@mail.gmail.com> (raw)
In-Reply-To: <CABgxfbHwo13ma=-Xn+S36WwD8LVNLdw6UHztFe8EkCA_=NBenw@mail.gmail.com>

On Fri, Feb 28, 2014 at 2:20 PM, Wendy Cheng <s.wendy.cheng@gmail.com> wrote:
> ni i...On Fri, Feb 28, 2014 at 1:41 PM, Tom Talpey <tom@talpey.com> wrote:
>>
>> On 2/26/2014 8:44 AM, Chuck Lever wrote:
>>>
>>> Hi-
>>>
>>> Shirley Ma and I are reviving work on the NFS/RDMA client code base in
>>> the Linux kernel.  So far we've built and run functional tests to determine
>>> what is working and what is broken.
>>>
>>> [snip]
>
>
>>>
>>> ALLPHYSICAL - Usually fast, but not safe as it exposes client memory.
>>> All HCAs support this mode.
>>
>>
>> Not safe is an understatement. It exposes all of client physical
>> memory to the peer, for both read and write. A simple pointer error
>> on the server will silently corrupt the client. This mode was
>> intended only for testing, and in experimental deployments.

(sorry, resend .. previous reply bounced back due to gmail html format)

Please keep "ALLPHYSICAL" for now  - as our embedded system needs it.

Thanks,
Wendy

  parent reply	other threads:[~2014-02-28 22:26 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-02-26 16:44 Proposal for simplifying NFS/RDMA client memory registration Chuck Lever
2014-02-26 16:44 ` Chuck Lever
     [not found] ` <01C4496A-F074-4F72-9DF0-6076C05E8A1F-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2014-02-26 17:42   ` faibish, sorin
2014-02-26 17:42     ` faibish, sorin
2014-02-28 21:41   ` Tom Talpey
2014-02-28 21:41     ` Tom Talpey
     [not found]     ` <CABgxfbHwo13ma=-Xn+S36WwD8LVNLdw6UHztFe8EkCA_=NBenw@mail.gmail.com>
     [not found]       ` <CABgxfbHwo13ma=-Xn+S36WwD8LVNLdw6UHztFe8EkCA_=NBenw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-02-28 22:26         ` Wendy Cheng [this message]
2014-02-28 22:26           ` Wendy Cheng
     [not found]           ` <CABgxfbHg0B02c2zpYdCB4pUZZhhA4aKRuyh4Kx=NE1yAisFLLQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-03-01  2:59             ` Chuck Lever
2014-03-01  2:59               ` Chuck Lever
     [not found]               ` <B83B4DA6-E9CF-4DF3-9227-5EF9B4D25F4D-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2014-03-01 16:00                 ` Jeff Layton
2014-03-01 16:00                   ` Jeff Layton
     [not found]                   ` <20140301110022.417eb088-9yPaYZwiELC+kQycOl6kW4xkIHaj4LzF@public.gmane.org>
2014-03-01 17:14                     ` Chuck Lever
2014-03-01 17:14                       ` Chuck Lever
2014-03-01 21:29                 ` Tom Tucker
2014-03-01 21:29                   ` Tom Tucker
     [not found]                   ` <53125125.9010709-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>
2014-03-02 22:28                     ` Chuck Lever
2014-03-02 22:28                       ` Chuck Lever
2014-03-03 17:02   ` Chuck Lever
2014-03-03 17:02     ` Chuck Lever
     [not found]     ` <E755E683-C064-4ED3-8448-C61F4E5AF16E-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2014-03-03 19:07       ` Christoph Hellwig
2014-03-03 19:07         ` Christoph Hellwig
     [not found]         ` <20140303190733.GA4556-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2014-03-03 19:54           ` faibish, sorin
2014-03-03 19:54             ` faibish, sorin
     [not found]             ` <79E85B7D-5ECC-4A63-BB07-C45A570DA53D-mb1K0bWo544@public.gmane.org>
2014-03-03 20:33               ` Wendy Cheng
2014-03-03 20:33                 ` Wendy Cheng

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