On 4/24/07, Andrei Konovalov <[EMAIL PROTECTED]> wrote: > Hi Grant, > > I've discovered the IBM Microdrive fits perfectly into the ML403 CF slot :) > So I've repeated the bonnie++ stress test on ML403 with the hard disk. > The log is below. > The test completed OK, but there was one message from the driver in the middle > of the test: > "[ 776.712206] xsysace xsa: kicking stalled fsm; state=3 task=3 iter=7829 > dc=0"
I added a kernel timer to the sysace driver to give the state machine a nudge if there is no activity after a short amount of time; for example, if an interrupt is missed. It is a rare condition, but if it happens, then the timer keeps the driver from hanging up completely. I don't know how to avoid the condition. It seems to be related to the CFBSY and DATARDY status bits. It seems that sometimes the sysace raises a DATARDY irq, but the driver cannot do anything because CFBSY is set. Then, after clearing that condition and yielding for a bit a subsequent DATARDY irq is lost and the state machine stalls. Thanks for the testing, it's a big help. Cheers, g. -- Grant Likely, B.Sc. P.Eng. Secret Lab Technologies Ltd. [EMAIL PROTECTED] (403) 399-0195 _______________________________________________ Linuxppc-embedded mailing list [email protected] https://ozlabs.org/mailman/listinfo/linuxppc-embedded
