From: David Miller <davem@davemloft.net>
To: mika.westerberg@linux.intel.com
Cc: gregkh@linuxfoundation.org, andreas.noever@gmail.com,
michael.jamet@intel.com, yehezkel.bernat@intel.com,
amir.jer.levy@intel.com, Mario.Limonciello@dell.com,
lukas@wunner.de, andriy.shevchenko@linux.intel.com,
andrew@lunn.ch, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org
Subject: Re: [PATCH v2 16/16] net: Add support for networking over Thunderbolt cable
Date: Wed, 27 Sep 2017 11:23:17 -0700 (PDT) [thread overview]
Message-ID: <20170927.112317.1120325676502363972.davem@davemloft.net> (raw)
In-Reply-To: <20170927172702.GE4630@lahna.fi.intel.com>
From: Mika Westerberg <mika.westerberg@linux.intel.com>
Date: Wed, 27 Sep 2017 20:27:02 +0300
> On Wed, Sep 27, 2017 at 09:27:09AM -0700, David Miller wrote:
>> From: Mika Westerberg <mika.westerberg@linux.intel.com>
>> Date: Wed, 27 Sep 2017 16:42:38 +0300
>>
>> > Using build_skb() then would require to allocate larger buffer, that
>> > includes NET_SKB_PAD + SKB_DATA_ALIGN(skb_shared_info) and that exceeds
>> > page size. Is this something supported by build_skb()? It was not clear
>> > to me based on the code and other users of build_skb() but I may be
>> > missing something.
>>
>> You need NET_SKB_PAD before and SKB_DATA_ALIGN(skb_shared_info) afterwards.
>> An order 1 page, if that's what you need, should work just fine.
>
> I mean in order to fit a single ThunderboltIP frame, I would need to
> allocate NET_SKB_PAD+4096+SKB_DATA_ALIGN(skb_shared_info) size buffer.
Which would be an order 1 page or 8192 bytes.
> Is that still fine for build_skb()? Also can I use that with
> skb_add_rx_frag() which seem to take single page?
Again, an order 1 page should work fine.
next prev parent reply other threads:[~2017-09-27 18:23 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-25 11:07 [PATCH v2 00/16] Thunderbolt networking Mika Westerberg
2017-09-25 11:07 ` [PATCH v2 01/16] byteorder: Move {cpu_to_be32,be32_to_cpu}_array() from Thunderbolt to core Mika Westerberg
2017-09-25 11:07 ` [PATCH v2 02/16] thunderbolt: Add support for XDomain properties Mika Westerberg
2017-09-27 4:33 ` David Miller
2017-09-27 11:32 ` Mika Westerberg
2017-09-27 16:06 ` David Laight
2017-09-27 16:22 ` David Miller
2017-09-25 11:07 ` [PATCH v2 03/16] thunderbolt: Move enum tb_cfg_pkg_type to thunderbolt.h Mika Westerberg
2017-09-25 11:07 ` [PATCH v2 04/16] thunderbolt: Move thunderbolt domain structure " Mika Westerberg
2017-09-25 11:07 ` [PATCH v2 05/16] thunderbolt: Move tb_switch_phy_port_from_link() " Mika Westerberg
2017-09-25 11:07 ` [PATCH v2 06/16] thunderbolt: Add support for XDomain discovery protocol Mika Westerberg
2017-09-27 4:35 ` David Miller
2017-09-25 11:07 ` [PATCH v2 07/16] thunderbolt: Configure interrupt throttling for all interrupts Mika Westerberg
2017-09-25 11:07 ` [PATCH v2 08/16] thunderbolt: Add support for frame mode Mika Westerberg
2017-09-25 11:07 ` [PATCH v2 09/16] thunderbolt: Export ring handling functions to modules Mika Westerberg
2017-09-25 11:07 ` [PATCH v2 10/16] thunderbolt: Move ring descriptor flags to thunderbolt.h Mika Westerberg
2017-09-25 11:07 ` [PATCH v2 11/16] thunderbolt: Use spinlock in ring serialization Mika Westerberg
2017-09-25 11:07 ` [PATCH v2 12/16] thunderbolt: Use spinlock in NHI serialization Mika Westerberg
2017-09-25 11:07 ` [PATCH v2 13/16] thunderbolt: Add polling mode for rings Mika Westerberg
2017-09-25 11:07 ` [PATCH v2 14/16] thunderbolt: Add function to retrieve DMA device for the ring Mika Westerberg
2017-09-25 11:07 ` [PATCH v2 15/16] thunderbolt: Allocate ring HopID automatically if requested Mika Westerberg
2017-09-25 11:07 ` [PATCH v2 16/16] net: Add support for networking over Thunderbolt cable Mika Westerberg
2017-09-27 4:47 ` David Miller
2017-09-27 13:42 ` Mika Westerberg
2017-09-27 16:27 ` David Miller
2017-09-27 17:27 ` Mika Westerberg
2017-09-27 18:23 ` David Miller [this message]
2017-09-26 17:37 ` [PATCH v2 00/16] Thunderbolt networking Andy Shevchenko
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170927.112317.1120325676502363972.davem@davemloft.net \
--to=davem@davemloft.net \
--cc=Mario.Limonciello@dell.com \
--cc=amir.jer.levy@intel.com \
--cc=andreas.noever@gmail.com \
--cc=andrew@lunn.ch \
--cc=andriy.shevchenko@linux.intel.com \
--cc=gregkh@linuxfoundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=lukas@wunner.de \
--cc=michael.jamet@intel.com \
--cc=mika.westerberg@linux.intel.com \
--cc=netdev@vger.kernel.org \
--cc=yehezkel.bernat@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).