From: Christoph Hellwig <hch@infradead.org>
To: Long Li <longli@microsoft.com>
Cc: Christoph Hellwig <hch@infradead.org>,
Steve French <sfrench@samba.org>,
"linux-cifs@vger.kernel.org" <linux-cifs@vger.kernel.org>,
"samba-technical@lists.samba.org"
<samba-technical@lists.samba.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [[PATCH v1] 15/37] [CIFS] SMBD: Post a SMBD data transfer message with data payload
Date: Wed, 30 Aug 2017 01:51:38 -0700 [thread overview]
Message-ID: <20170830085138.GA4761@infradead.org> (raw)
In-Reply-To: <MWHPR21MB0190E9E8303EADE6A6C84D90CE9C0@MWHPR21MB0190.namprd21.prod.outlook.com>
On Wed, Aug 30, 2017 at 02:17:56AM +0000, Long Li wrote:
> I partially addressed this issue in the V3 patch. Most of the duplicate
> code on sending path is merged.
>
> The difficulty with translating the buffer to pages is that: I don't
> know how many pages will be translated, and how many struct page I need
> to allocate in advance to hold them. I try to avoid memory allocation
> in the I/O path as much as possible. So I keep two functions of
> sending data: one for buffer and one for pages.
You do: you'll always need speace for (len + PAGE_SIZE - 1) >> PAGE_SIZE
pages.
That being said: what callers even send you buffers? In general we
should aim to work with pages for all allocations that aren't tiny.
next prev parent reply other threads:[~2017-08-30 8:51 UTC|newest]
Thread overview: 94+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-02 20:10 [[PATCH v1] 00/37] Implement SMBD protocol: Series 1 Long Li
2017-08-02 20:10 ` [[PATCH v1] 01/37] [CIFS] SMBD: Add parsing for new rdma mount option Long Li
2017-08-14 19:10 ` Tom Talpey
2017-08-14 22:53 ` Long Li
2017-08-02 20:10 ` [[PATCH v1] 02/37] [CIFS] SMBD: Add structure for SMBD transport Long Li
2017-08-08 6:58 ` Stefan Metzmacher
2017-08-12 8:32 ` Long Li
2017-08-12 18:49 ` Christoph Hellwig
2017-08-14 13:41 ` Stefan Metzmacher
2017-08-14 18:10 ` Long Li
2017-08-13 10:10 ` Christoph Hellwig
2017-08-02 20:10 ` [[PATCH v1] 03/37] [CIFS] SMBD: Add logging functions for debug Long Li
2017-08-02 20:10 ` [[PATCH v1] 04/37] [CIFS] SMBD: Define per-channel SMBD transport parameters and default values Long Li
2017-08-13 10:11 ` Christoph Hellwig
2017-08-14 19:28 ` Tom Talpey
2017-08-14 22:57 ` Long Li
2017-08-02 20:10 ` [[PATCH v1] 05/37] [CIFS] SMBD: Implement API for upper layer to create SMBD transport and establish RDMA connection Long Li
2017-08-14 19:54 ` Tom Talpey
2017-08-30 2:35 ` Long Li
2017-08-02 20:10 ` [[PATCH v1] 06/37] [CIFS] SMBD: Add definition and cache for SMBD response Long Li
2017-08-02 20:10 ` [[PATCH v1] 07/37] [CIFS] SMBD: Implement receive buffer for handling " Long Li
2017-08-14 20:09 ` Tom Talpey
2017-08-19 23:41 ` Long Li
2017-08-02 20:10 ` [[PATCH v1] 08/37] [CIFS] SMBD: Define packet format for SMBD data transfer message Long Li
2017-08-13 10:15 ` Christoph Hellwig
2017-08-14 10:24 ` Jeff Layton
2017-08-02 20:10 ` [[PATCH v1] 09/37] [CIFS] SMBD: Add SMBD request and cache Long Li
2017-08-02 20:10 ` [[PATCH v1] 10/37] [CIFS] SMBD: Introduce wait queue when sending SMBD request Long Li
2017-08-02 20:10 ` [[PATCH v1] 11/37] [CIFS] SMBD: Post a receive request Long Li
2017-08-13 10:18 ` Christoph Hellwig
2017-08-02 20:10 ` [[PATCH v1] 12/37] [CIFS] SMBD: Handle send completion from CQ Long Li
2017-08-13 10:19 ` Christoph Hellwig
2017-08-14 18:16 ` Long Li
2017-08-02 20:10 ` [[PATCH v1] 13/37] [CIFS] SMBD: Implement SMBD protocol negotiation Long Li
2017-08-13 10:22 ` Christoph Hellwig
2017-08-02 20:10 ` [[PATCH v1] 14/37] [CIFS] SMBD: Post a SMBD data transfer message with page payload Long Li
2017-08-14 20:23 ` Tom Talpey
2017-08-14 22:58 ` Long Li
2017-08-02 20:10 ` [[PATCH v1] 15/37] [CIFS] SMBD: Post a SMBD data transfer message with data payload Long Li
2017-08-13 10:23 ` Christoph Hellwig
2017-08-30 2:17 ` Long Li
2017-08-30 8:51 ` Christoph Hellwig [this message]
2017-08-30 18:17 ` Long Li
2017-08-14 20:26 ` Tom Talpey
2017-08-02 20:10 ` [[PATCH v1] 16/37] [CIFS] SMBD: Post a SMBD message with no payload Long Li
2017-08-13 10:24 ` Christoph Hellwig
2017-08-14 18:20 ` Long Li
2017-08-14 19:00 ` Tom Talpey
2017-08-14 22:51 ` Long Li
2017-08-14 23:12 ` Tom Talpey
2017-08-02 20:10 ` [[PATCH v1] 17/37] [CIFS] SMBD: Track status for transport Long Li
2017-08-02 20:10 ` [[PATCH v1] 18/37] [CIFS] SMBD: Implement API for upper layer to send data Long Li
2017-08-14 20:44 ` Tom Talpey
2017-08-19 23:41 ` Long Li
2017-08-30 2:30 ` Long Li
2017-08-02 20:10 ` [[PATCH v1] 19/37] [CIFS] SMBD: Manage credits on SMBD client and server Long Li
2017-08-14 20:47 ` Tom Talpey
2017-08-14 23:03 ` Long Li
2017-08-02 20:10 ` [[PATCH v1] 20/37] [CIFS] SMBD: Implement reassembly queue for receiving data Long Li
2017-08-02 20:10 ` [[PATCH v1] 21/37] [CIFS] SMBD: Implement API for upper layer to receive data Long Li
2017-08-14 20:57 ` Tom Talpey
2017-08-14 23:24 ` Long Li
2017-08-14 23:35 ` Tom Talpey
2017-08-02 20:10 ` [[PATCH v1] 22/37] [CIFS] SMBD: Implement API for upper layer to receive data to page Long Li
2017-08-14 20:59 ` Tom Talpey
2017-08-02 20:10 ` [[PATCH v1] 23/37] [CIFS] SMBD: Implement API for upper layer to reconnect transport Long Li
2017-08-14 21:02 ` Tom Talpey
2017-08-14 23:37 ` Long Li
2017-08-02 20:10 ` [[PATCH v1] 24/37] [CIFS] SMBD: Support for SMBD keep alive protocol Long Li
2017-08-14 21:06 ` Tom Talpey
2017-08-14 23:27 ` Long Li
2017-08-02 20:10 ` [[PATCH v1] 25/37] [CIFS] SMBD: Support SMBD idle connection timer Long Li
2017-08-14 21:12 ` Tom Talpey
2017-08-14 23:29 ` Long Li
2017-08-14 23:42 ` Tom Talpey
2017-08-15 0:10 ` Long Li
2017-08-02 20:10 ` [[PATCH v1] 26/37] [CIFS] SMBD: Send an immediate packet when it's needed Long Li
2017-08-14 21:15 ` Tom Talpey
2017-08-02 20:10 ` [[PATCH v1] 27/37] [CIFS] SMBD: Destroy transport when RDMA channel is disconnected Long Li
2017-08-02 20:10 ` [[PATCH v1] 28/37] [CIFS] SMBD: Implement API for upper layer to destroy the transport Long Li
2017-08-02 20:10 ` [[PATCH v1] 29/37] [CIFS] SMBD: Disconnect RDMA connection on QP errors Long Li
2017-08-02 20:10 ` [[PATCH v1] 30/37] [CIFS] SMBD: Add SMBDirect transport to Makefile Long Li
2017-08-14 21:20 ` Tom Talpey
2017-08-14 23:30 ` Long Li
2017-08-02 20:10 ` [[PATCH v1] 31/37] [CIFS] Add SMBD transport to SMB session context Long Li
2017-08-02 20:10 ` [[PATCH v1] 32/37] [CIFS] Add SMBD debug couters to CIFS debug exports Long Li
2017-08-02 20:10 ` [[PATCH v1] 33/37] [CIFS] Connect to SMBD transport when specified in mount option Long Li
2017-08-02 20:10 ` [[PATCH v1] 34/37] [CIFS] Reconnect to SMBD transport when it's used Long Li
2017-08-02 20:10 ` [[PATCH v1] 35/37] [CIFS] Destroy SMBD transport on exit Long Li
2017-08-02 20:10 ` [[PATCH v1] 36/37] [CIFS] Read from SMBD transport when it's used Long Li
2017-08-02 20:10 ` [[PATCH v1] 37/37] [CIFS] Write to " Long Li
2017-08-13 10:27 ` [[PATCH v1] 00/37] Implement SMBD protocol: Series 1 Christoph Hellwig
2017-08-13 10:31 ` Christoph Hellwig
2017-08-14 17:04 ` Long Li
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