From: Christoph Hellwig <hch@infradead.org>
To: Chuck Lever <chuck.lever@oracle.com>
Cc: Mike Snitzer <snitzer@kernel.org>,
Benjamin Coddington <bcodding@redhat.com>,
Jeff Layton <jlayton@kernel.org>,
linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org,
Jens Axboe <axboe@kernel.dk>
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]
Date: Thu, 12 Jun 2025 22:39:03 -0700 [thread overview]
Message-ID: <aEu5d3XnI9oNtjwd@infradead.org> (raw)
In-Reply-To: <04acd698-a065-4e87-b321-65881c2f036d@oracle.com>
On Thu, Jun 12, 2025 at 11:58:27AM -0400, Chuck Lever wrote:
> NFS/RDMA does this already. Let's not re-invent the wheel.
The other thing that fixes the problem (but also creates various others)
are the block/scsi/nvme layouts, which gurantee that all the data
transfers to the data device us block protocols that gets this right.
Well, unless you run them over TCP and still get the whole receive
side copy issue in the drivers, but at least the copied payload
is always aligned.
next prev parent reply other threads:[~2025-06-13 5:39 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-10 20:57 [PATCH 0/6] NFSD: add enable-dontcache and initially use it to add DIO support Mike Snitzer
2025-06-10 20:57 ` [PATCH 1/6] NFSD: add the ability to enable use of RWF_DONTCACHE for all IO Mike Snitzer
2025-06-11 6:57 ` Christoph Hellwig
2025-06-11 10:44 ` Mike Snitzer
2025-06-11 13:04 ` Jeff Layton
2025-06-11 13:56 ` Chuck Lever
2025-06-11 14:31 ` Chuck Lever
2025-06-11 19:18 ` Mike Snitzer
2025-06-11 20:29 ` Jeff Layton
2025-06-11 21:36 ` 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] Mike Snitzer
2025-06-12 10:28 ` Jeff Layton
2025-06-12 11:28 ` Jeff Layton
2025-06-12 13:28 ` Chuck Lever
2025-06-12 14:17 ` Benjamin Coddington
2025-06-12 15:56 ` Mike Snitzer
2025-06-12 15:58 ` Chuck Lever
2025-06-12 16:12 ` Mike Snitzer
2025-06-12 16:32 ` Chuck Lever
2025-06-13 5:39 ` Christoph Hellwig [this message]
2025-06-12 16:22 ` Jeff Layton
2025-06-13 5:46 ` Christoph Hellwig
2025-06-13 9:23 ` Mike Snitzer
2025-06-13 13:02 ` Jeff Layton
2025-06-16 12:35 ` Christoph Hellwig
2025-06-16 12:29 ` Christoph Hellwig
2025-06-16 16:07 ` Mike Snitzer
2025-06-17 4:37 ` Christoph Hellwig
2025-06-17 20:26 ` Mike Snitzer
2025-06-17 22:23 ` [RFC PATCH] lib/iov_iter: remove piecewise bvec length checking in iov_iter_aligned_bvec [was: Re: need SUNRPC TCP to receive into aligned pages] Mike Snitzer
2025-07-03 0:12 ` 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] NeilBrown
2025-06-12 7:13 ` [PATCH 1/6] NFSD: add the ability to enable use of RWF_DONTCACHE for all IO Christoph Hellwig
2025-06-12 13:15 ` Chuck Lever
2025-06-12 13:21 ` Chuck Lever
2025-06-12 16:00 ` Mike Snitzer
2025-06-16 13:32 ` Chuck Lever
2025-06-16 16:10 ` Mike Snitzer
2025-06-17 17:22 ` Mike Snitzer
2025-06-17 17:31 ` Chuck Lever
2025-06-19 20:19 ` Mike Snitzer
2025-06-30 14:50 ` Chuck Lever
2025-07-04 19:46 ` Mike Snitzer
2025-07-04 19:49 ` Chuck Lever
2025-06-10 20:57 ` [PATCH 2/6] NFSD: filecache: add STATX_DIOALIGN and STATX_DIO_READ_ALIGN support Mike Snitzer
2025-06-10 20:57 ` [PATCH 3/6] NFSD: pass nfsd_file to nfsd_iter_read() Mike Snitzer
2025-06-10 20:57 ` [PATCH 4/6] fs: introduce RWF_DIRECT to allow using O_DIRECT on a per-IO basis Mike Snitzer
2025-06-11 6:58 ` Christoph Hellwig
2025-06-11 10:51 ` Mike Snitzer
2025-06-11 14:17 ` Chuck Lever
2025-06-12 7:15 ` Christoph Hellwig
2025-06-10 20:57 ` [PATCH 5/6] NFSD: leverage DIO alignment to selectively issue O_DIRECT reads and writes Mike Snitzer
2025-06-11 7:00 ` Christoph Hellwig
2025-06-11 12:23 ` Mike Snitzer
2025-06-11 13:30 ` Jeff Layton
2025-06-12 7:22 ` Christoph Hellwig
2025-06-12 7:23 ` Christoph Hellwig
2025-06-11 14:42 ` Chuck Lever
2025-06-11 15:07 ` Jeff Layton
2025-06-11 15:11 ` Chuck Lever
2025-06-11 15:44 ` Jeff Layton
2025-06-11 20:51 ` Mike Snitzer
2025-06-12 7:32 ` Christoph Hellwig
2025-06-12 7:28 ` Christoph Hellwig
2025-06-12 7:25 ` Christoph Hellwig
2025-06-10 20:57 ` [PATCH 6/6] NFSD: issue READs using O_DIRECT even if IO is misaligned Mike Snitzer
2025-06-11 12:55 ` [PATCH 0/6] NFSD: add enable-dontcache and initially use it to add DIO support Jeff Layton
2025-06-12 7:39 ` Christoph Hellwig
2025-06-12 20:37 ` Mike Snitzer
2025-06-13 5:31 ` Christoph Hellwig
2025-06-11 14:16 ` Chuck Lever
2025-06-11 18:02 ` Mike Snitzer
2025-06-11 19:06 ` Chuck Lever
2025-06-11 19:58 ` Mike Snitzer
2025-06-12 13:46 ` Chuck Lever
2025-06-12 19:08 ` Mike Snitzer
2025-06-12 20:17 ` Chuck Lever
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