On 8 October 2011 23:45, Juergen Beisert <jbe@xxxxxxxxxxxxxx> wrote: > 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. No. I don't think they are part of 3.0.6 kernel. I am not sure of the issue you have with serial console, but if you do not have these patches already applied, you could try with them. 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
