Hi,
I've instrumented the mark_buffer_dirty routine of the kernel to print the address that b_data points to for a simple block device driver I got from http://lwn.net/Articles/58720/. I get perfectly valid addresses most of the time, except that sometimes the pointer has the value of 0x400. I have been looking at this for a very long time and I have no idea what could be causing this?
Does anyone have any ideas?
This happens in kernel 2.6.11 on ext3.
Thanks for any help, Can
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