On Thu, Aug 1, 2013 at 1:04 PM, Eric Dumazet eric.duma...@gmail.com wrote:
On Thu, 2013-08-01 at 12:41 +0800, Ming Lei wrote:
From my trace result, lots of linear SKBs are cloned or header-cloned, so
it needs skb copy too.
Is it normal in xmit path to see cloned SKBs for driver? If not, I
On Thu, 2013-08-01 at 16:10 +0800, Ming Lei wrote:
On Thu, Aug 1, 2013 at 1:04 PM, Eric Dumazet eric.duma...@gmail.com wrote:
On Thu, 2013-08-01 at 12:41 +0800, Ming Lei wrote:
From my trace result, lots of linear SKBs are cloned or header-cloned, so
it needs skb copy too.
Is it
On Wed, Jul 31, 2013 at 3:51 AM, Ming Lei ming@canonical.com wrote:
This patch enables 'can_dma_sg' flag for ax88179_178a device
if the attached host controller supports building packet from
discontinuous buffers(DMA SG is possible), so both frame header
and skb data buffers can be passed
On Thu, 2013-08-01 at 08:30 -0700, Grant Grundler wrote:
http://lxr.free-electrons.com/source/include/linux/byteorder/generic.h#L111
http://lxr.free-electrons.com/ident?i=__cpu_to_le32s
IIRC, cpu_to_leXX() macros return the endian corrected value.
In other words, they need to be assigned to
On Wed, Jul 31, 2013 at 06:51:49PM +0800, Ming Lei wrote:
This patch enables 'can_dma_sg' flag for ax88179_178a device
if the attached host controller supports building packet from
discontinuous buffers(DMA SG is possible), so both frame header
and skb data buffers can be passed to usb stack
On Wed, Jul 31, 2013 at 8:47 PM, Greg Kroah-Hartman
gre...@linuxfoundation.org wrote:
On Wed, Jul 31, 2013 at 06:51:49PM +0800, Ming Lei wrote:
This patch enables 'can_dma_sg' flag for ax88179_178a device
if the attached host controller supports building packet from
discontinuous buffers(DMA
On Wed, 2013-07-31 at 21:50 +0800, Ming Lei wrote:
In the usbnet case, the driver already supports non-sg well. Actually,
all current drivers should support non-sg well because urb-sg wasn't
introduced for very long time. We can think it as a new feature or DMA
enhancement for xHCI
On Wed, 2013-07-31 at 16:02 +0200, Oliver Neukum wrote:
On Wed, 2013-07-31 at 21:50 +0800, Ming Lei wrote:
In the usbnet case, the driver already supports non-sg well. Actually,
all current drivers should support non-sg well because urb-sg wasn't
introduced for very long time. We can
On Wed, Jul 31, 2013 at 11:15 PM, Eric Dumazet eric.duma...@gmail.com wrote:
On Wed, 2013-07-31 at 16:02 +0200, Oliver Neukum wrote:
On Wed, 2013-07-31 at 21:50 +0800, Ming Lei wrote:
In the usbnet case, the driver already supports non-sg well. Actually,
all current drivers should support
On Wed, Jul 31, 2013 at 11:15 PM, Eric Dumazet eric.duma...@gmail.com wrote:
On Wed, 2013-07-31 at 16:02 +0200, Oliver Neukum wrote:
Hmm, I would rather make sure SG is really supported before adding TSO
support.
TCP stack can build skb with fragments of any size, not multiple
of 512 or
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