Did anyone encounter something like the following:
I have a system with linux accessing jffs2 nand via a busy local bus. I run into one of the three: random file corruption, magic bit mask
1985 not found, or kernel traps ( BUG_ON(!PageUptodate(pg)) ): ie deadlocks with page_cache_read in the garbage collector.
What's keeping the local bus busy is burst mode DMA to a FIFO device. The processor is a powerpc 83XX with a local bus controller supporting : and enbedded NAND flash controller, generic single cycle bus access and UPM ( programmable timing ) to support my burst mode dma.
My apologies, I seem these days to be asking questions and not helping to answer them.
TTB