From mboxrd@z Thu Jan 1 00:00:00 1970 From: fransklaver@gmail.com (Frans Klaver) Date: Fri, 22 Aug 2014 00:07:22 +0200 Subject: [RFC PATCH 3/4] tty: omap-serial: use threaded interrupt handler In-Reply-To: <20140821214840.GU11146@saruman.home> References: <1406645577-18620-1-git-send-email-frans.klaver@xsens.com> <1408450488-4083-1-git-send-email-frans.klaver@xsens.com> <1408450488-4083-4-git-send-email-frans.klaver@xsens.com> <20140819185701.GC22003@saruman.home> <20140820064028.GC9319@ci00147.xsens-tech.local> <20140820160604.GH24500@saruman.home> <20140821214117.GA7076@ci00147.xsens-tech.local> <20140821214840.GU11146@saruman.home> Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On August 21, 2014 11:48:40 PM CEST, Felipe Balbi wrote: >Hi, > >On Thu, Aug 21, 2014 at 11:41:17PM +0200, Frans Klaver wrote: >> On Wed, Aug 20, 2014 at 11:06:05AM -0500, Felipe Balbi wrote: >> > On Wed, Aug 20, 2014 at 08:40:28AM +0200, Frans Klaver wrote: >> > > On Tue, Aug 19, 2014 at 01:57:02PM -0500, Felipe Balbi wrote: >> > > > On Tue, Aug 19, 2014 at 02:14:47PM +0200, Frans Klaver wrote: >> > > > > At 3.6Mbaud, with slightly over 2Mbit/s data coming in, we >see 1600 uart >> > > > > rx buffer overflows within 30 seconds. Threading the >interrupt handling reduces >> > > > > this to about 170 overflows in 10 minutes. >> > > > >> > > > Can you try Sebastian Siewior's patches for 8250_omap and 8250 >dma >> > > > 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 >> 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