On August 21, 2014 11:48:40 PM CEST, Felipe Balbi [off-list ref] wrote:

Hi,

On Thu, Aug 21, 2014 at 11:41:17PM +0200, Frans Klaver wrote:

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On Wed, Aug 20, 2014 at 11:06:05AM -0500, Felipe Balbi wrote:

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On Wed, Aug 20, 2014 at 08:40:28AM +0200, Frans Klaver wrote:

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On Tue, Aug 19, 2014 at 01:57:02PM -0500, Felipe Balbi wrote:

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On Tue, Aug 19, 2014 at 02:14:47PM +0200, Frans Klaver wrote:

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At 3.6Mbaud, with slightly over 2Mbit/s data coming in, we

see 1600 uart

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rx buffer overflows within 30 seconds. Threading the

interrupt handling reduces

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this to about 170 overflows in 10 minutes.

Can you try Sebastian Siewior's patches for 8250_omap and 8250

dma

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support ? That should help you a lot.

I'll have a look at that series. Thanks for pointing it out.

I have had a look at Sebastian's series, but I'm not convinced
yet that we should use it. So far the serial console seems to be
missing data every now and then. I haven't gotten around to testing

our

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high traffic application yet.

as any new driver, there are bugs to be fixed. How about reporting the
ones you found together with a way of reproducing them so they can be
fixed ?

Yes, definitely.

Cheers, 
Frans