Hello together, I'm currently working on the l2cap module for the Bluetooth subsystem. Everything worked fine so far until I used a kernel with enabled PREEMPT in its configuration. At first my kernel log was flooded with messages like »scheduling while atomic« etc. Now the whole system just freezes when I try to test my code. I get the common Debug messages from my code but suddenly I get messages (shortened): scheduling while atomic: swapper/0x00000001/0 [<c030b03d>] schedule+0x9cd/0xd60 irq_exit+... do_IRQ+... common_interrupt+... acpi_processor_idle+... cpu_idle+... start_kernel+... unknown_bootoption+... and the system hangs (I have only the option to use the SysRq key combinations). Without knowing the details of my code (I can give you snippets that are related to my problem) -- what might be useful to look at? This is the first time I encounter such problems and I read various chapters in great books (Greg's LDD book for example) and so I assume it is related to some locking issues -- but I have no clue how to figure that out. Are there any advices? Thanks, Martin -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
