I am having problem reading file if the file is opened with O_DIERCT flag.The error given by read system call is 'Bad Address'.
The buffer where i am trying to read is a device that is mapped into the process address space.
I have checked that buffer is mapped by looking into the proc/<pid of my process>/maps.
I am using ext2 filesysytem with blocksize is 2048.
The address where i am trying to read is block aligned(i.e 2048 byte aligned) and the number of bytes i am trying to read is also multiple of 2048.
I am using kernel release:2.6.XXX.
I couldn't understand why it's creating problem with O_DIRECT because the program works if i open file without O_DIRECT.
-manisha
