From: Eric Dumazet <eric.dumazet-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: Ming Lei <ming.lei-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org>
Cc: "David S. Miller" <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>,
Greg Kroah-Hartman
<gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>,
Oliver Neukum <oneukum-l3A5Bk7waGM@public.gmane.org>,
Freddy Xin <freddy-knRN6Y/kmf1NUHwG+Fw1Kw@public.gmane.org>,
Ben Hutchings
<bhutchings-s/n/eUQHGBpZroRs9YW3xA@public.gmane.org>,
Grant Grundler <grundler-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH 0/4] USB & USBNET: loose DMA SG check and support usbnet DMA SG
Date: Wed, 31 Jul 2013 08:25:40 -0700 [thread overview]
Message-ID: <1375284340.10515.105.camel@edumazet-glaptop> (raw)
In-Reply-To: <1375267909-30373-1-git-send-email-ming.lei-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org>
On Wed, 2013-07-31 at 18:51 +0800, Ming Lei wrote:
> Hi,
>
> This patchset allows drivers to pass sg buffers which size can't be divided
> by max packet size of endpoint if the host controllers support this kind
> of sg buffers.
>
> Previously we add check[1] on the situation and don't allow these sg buffers
> passed to USB HCD, looks the check is too strict because some applications(such
> as network stack) can't provide this sg buffers which size can be divided by
> max packet size, so this patch looses the check in case that the host controllers
> support it.
>
> Also patch 3/4 implements DMA SG on usbnet driver, and patch 4/4
> enables it on ax88179_178a USB3 NIC, so CPU utilization can be
> decreased much with usbnet DMA SG when the USB3 NIC is attached to
> xHCI controller.
This looks very promising to me, thanks a lot for doing this Ming.
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prev parent reply other threads:[~2013-07-31 15:25 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-31 10:51 [PATCH 0/4] USB & USBNET: loose DMA SG check and support usbnet DMA SG Ming Lei
2013-07-31 10:51 ` [PATCH 1/4] USB: introduce no_sg_limit field into usb_bus Ming Lei
2013-07-31 10:51 ` [PATCH 3/4] USBNET: support DMA SG Ming Lei
2013-07-31 10:51 ` [PATCH 4/4] USBNET: ax88179_178a: enable tso if host supports sg dma Ming Lei
2013-07-31 12:47 ` Greg Kroah-Hartman
2013-07-31 13:50 ` Ming Lei
2013-07-31 14:02 ` Oliver Neukum
[not found] ` <1375279366.14846.1.camel-B2T3B9s34ElbnMAlSieJcQ@public.gmane.org>
2013-07-31 15:15 ` Eric Dumazet
2013-07-31 15:25 ` Ming Lei
2013-08-01 2:04 ` Ming Lei
[not found] ` <1375267909-30373-5-git-send-email-ming.lei-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org>
2013-08-01 3:51 ` Eric Dumazet
2013-08-01 4:41 ` Ming Lei
2013-08-01 5:04 ` Eric Dumazet
2013-08-01 8:10 ` Ming Lei
[not found] ` <CACVXFVMt-TgRVU+iA3NVuUzJSeXUPGvV89OnDdHaLEB1Ua6aAw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-08-01 13:21 ` Eric Dumazet
2013-08-01 13:49 ` [PATCH net-next] ax88179_178a: avoid copy of tx tcp packets Eric Dumazet
2013-08-01 13:52 ` Eric Dumazet
2013-08-04 4:56 ` David Miller
2013-08-01 15:30 ` [PATCH 4/4] USBNET: ax88179_178a: enable tso if host supports sg dma Grant Grundler
2013-08-01 15:36 ` Eric Dumazet
2013-08-01 16:12 ` Grant Grundler
2013-07-31 11:12 ` [PATCH 0/4] USB & USBNET: loose DMA SG check and support usbnet DMA SG Oliver Neukum
2013-07-31 11:55 ` Ming Lei
[not found] ` <1375267909-30373-1-git-send-email-ming.lei-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org>
2013-07-31 10:51 ` [PATCH 2/4] USB: XHCI: mark no_sg_limit Ming Lei
2013-07-31 16:40 ` Sarah Sharp
2013-08-01 7:30 ` Greg Kroah-Hartman
2013-08-01 8:15 ` Oliver Neukum
2013-08-01 20:47 ` Sarah Sharp
2013-07-31 15:25 ` Eric Dumazet [this message]
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