Hi Thomas, Thomas Abraham wrote: > On 8 October 2011 16:56, Juergen Beisert <jbe@xxxxxxxxxxxxxx> wrote: > > Thomas Gleixner wrote: > >> I'm pleased to announce the 3.0.6-rt17 release. > > > > I have no idea where to search, but when I'm using the 3.0.6-rt17 on my > > Samsung S3C6410 ARM based system, the UART (serial console) does not work > > as expected. Typing only one char at a time is okay. Typing two chars > > immediately makes the system using 100 % CPU load and takes about 2 > > seconds to respond. It seems the interrupt handling is broken in the UART > > driver, but I don't know how to fix it. > > > > This with a simple cursor up (one char to get the last command) and a > > small pause to the next "ENTER" char: > > > > root@mini6410:~ cat /proc/interrupts | grep 18: > > 18: 5739107 s3c-uart s3c6400-uart > > > > Same again: > > > > root@mini6410:~ cat /proc/interrupts | grep 18: > > 18: 5739113 s3c-uart s3c6400-uart > > > > 6 interrupts seems reasonable. > > > > Now with cursor up and SPACE immediately, then a pause for ENTER: > > > > root@mini6410:~ cat /proc/interrupts | grep 18: > > 18: 5923815 s3c-uart s3c6400-uart > > > > 184702 interrupts looks strange. > > Just curious, do you have the following two commits? > > serial: samsung: Add unified interrupt handler for s3c64xx and later SoC's > ARM: SAMSUNG: Remove uart irq handling from platform code Are they part of the current 3.0.6 vanilla kernel? I'm only using the vanilla 3.0.6 with rt17 on my target. jbe -- Pengutronix e.K. | Juergen Beisert | Linux Solutions for Science and Industry | http://www.pengutronix.de/ | -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
