Transcript Mid-Presentation.ppt

Mid-presentation
Shuanglong Zhang
Two ways
• Modify the original dm-linear.c
• Copy it and make it a independent module
original
• No need to change anything in makefile or
somewhere else.
• Not flexible enough
new module
• Need to change a little
• Link dmsetup and new module
Why linear
• It's simple
• Use it as a tool to "see" bio structures
• Do a '0' to '0' map
/proc
• Create a /proc interface to see all the bio
info in a sliding window.
Next
• /proc need to improve
• controls on bio request based on kernel
timer and request queue size