On Sun, 2 Jul 2000, Chris Lattner wrote:
> _YES_ and I found the deadlock. :) I'll describe it for you... it's the
> result of two seemingly innocuous things:
> 1. printk of arguments to the sys_access function
> 2. printk of mappings of vm pages
Not a deadlock, you are breaking rules. A simple "don't do that" fixes
the deadlock.
printk takes only kernel-space addresses. Don't expect it to page
anything in for you. That work should be done in your driver, BEFORE
calling printk.
In general, don't expect userspace addresses to be available without
help from uaccess.h or map_user_kiobuf...
Jeff
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