ext2: buffer_head usage with and without O_DIRECT

This is with respect to 2.4.28 on http://lxr.linux.no/source/?v=2.4.18 When i do read/write on ext2 without opening files with O_DIRECT, i can see buffer_head constantly increasing in /proc/slabinfo. But when I open files with O_DIRECT, the i/o is done without using buffer_head, /proc/slabinfo s

Oprofile: patch for Call-graph on AMD64

Is oprofile patch available for call-graph support on AMD64 ? http://oprofile.sourceforge.net/patches/ has only for IA64 and x86. What is the status of progress on AMD64 with respect to this. Thanks. __ Yahoo! Mail Stay connected, organized, and