Hi Juergen, 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 Thanks, Thomas. -- 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
