Re: need SUNRPC TCP to receive into aligned pages [was: Re: [PATCH 1/6] NFSD: add the ability to enable use of RWF_DONTCACHE for all IO]

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Subject: Re: need SUNRPC TCP to receive into aligned pages [was: Re: [PATCH 1/6] NFSD: add the ability to enable use of RWF_DONTCACHE for all IO]
From: Mike Snitzer <snitzer@xxxxxxxxxx>
Date: Thu, 12 Jun 2025 11:56:28 -0400
Cc: Chuck Lever <chuck.lever@xxxxxxxxxx>, Jeff Layton <jlayton@xxxxxxxxxx>, linux-nfs@xxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, Jens Axboe <axboe@xxxxxxxxx>
In-reply-to: <5D9EA89B-A65F-40A1-B78F-547A42734FC2@redhat.com>
References: <20250610205737.63343-1-snitzer@kernel.org> <20250610205737.63343-2-snitzer@kernel.org> <4b858fb1-25f6-457f-8908-67339e20318e@oracle.com> <aEnWhlXjzOmRfCJf@kernel.org> <7c48e17c4b575375069a4bd965f346499e66ac3a.camel@kernel.org> <aEn2-mYA3VDv-vB8@kernel.org> <110c7644b829ce158680979e6cd358193ea3f52b.camel@kernel.org> <d13ef7d6-0040-40ac-9761-922a1ec5d911@oracle.com> <5D9EA89B-A65F-40A1-B78F-547A42734FC2@redhat.com>

On Thu, Jun 12, 2025 at 10:17:22AM -0400, Benjamin Coddington wrote:
> 
> What's already been mentioned elsewhere, but not yet here:
> 
> The transmitter could always just tell the receiver where the data is, we'd
> need an NFS v3.1 and an extension for v4.2?
> 
> Pot Stirred,
> Ben

Yeah, forgot to mention giving serious consideration to extending
specs to make this happen easier.  Pros and cons to doing so.

Thanks for raising it.

Mike

Follow-Ups:
- Re: need SUNRPC TCP to receive into aligned pages [was: Re: [PATCH 1/6] NFSD: add the ability to enable use of RWF_DONTCACHE for all IO]
  - From: Chuck Lever

References:
- [PATCH 0/6] NFSD: add enable-dontcache and initially use it to add DIO support
  - From: Mike Snitzer
- [PATCH 1/6] NFSD: add the ability to enable use of RWF_DONTCACHE for all IO
  - From: Mike Snitzer
- Re: [PATCH 1/6] NFSD: add the ability to enable use of RWF_DONTCACHE for all IO
  - From: Chuck Lever
- Re: [PATCH 1/6] NFSD: add the ability to enable use of RWF_DONTCACHE for all IO
  - From: Mike Snitzer
- Re: [PATCH 1/6] NFSD: add the ability to enable use of RWF_DONTCACHE for all IO
  - From: Jeff Layton
- need SUNRPC TCP to receive into aligned pages [was: Re: [PATCH 1/6] NFSD: add the ability to enable use of RWF_DONTCACHE for all IO]
  - From: Mike Snitzer
- Re: need SUNRPC TCP to receive into aligned pages [was: Re: [PATCH 1/6] NFSD: add the ability to enable use of RWF_DONTCACHE for all IO]
  - From: Jeff Layton
- Re: need SUNRPC TCP to receive into aligned pages [was: Re: [PATCH 1/6] NFSD: add the ability to enable use of RWF_DONTCACHE for all IO]
  - From: Chuck Lever
- Re: need SUNRPC TCP to receive into aligned pages [was: Re: [PATCH 1/6] NFSD: add the ability to enable use of RWF_DONTCACHE for all IO]
  - From: Benjamin Coddington

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