Messages in this thread | | | Subject | console problem?, close(2) hangs /sbin/init | Date | Sat, 22 Jan 2011 14:45:09 -0700 | From | John Linn <> |
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I have a kernel that runs fine with a busybox root file system using inittab. When I move to a non-busybox init (sysvinit), I see init hanging when doing a close of standard error very early when it starts. I have debugged it with GDB but not found the source of the hang as it's in the kernel it appears.
To debug this, I use init=/bin/sh on the kernel command line, then exec init to start it. The same root file system works on another board with a different kernel. I have also noticed that building init with INITDEBUG on so that it forks for debugging makes it work fine. This seems to indicate the device nodes are all fine to me.
It seems related to PID 1 and the console device.
Adding debug to the kernel in sys_close() shows it hanging in filp_close() and I'm still digging more (maybe locking issue). The console is a serial device with a newer driver which I suspected to be the issue, but can't see anything wrong.
Any hints or similar problems seen would be much appreciated. Thanks, John
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