I/O Scheduler Framework
dillon at apollo.backplane.com
Sun Mar 1 12:10:42 PST 2009
I'm slapping this part of the IRC conversation into email so we
don't lose it:
Step #1: Replace all calls to dev_dstrategy() with calls to io_schedule()
ins tead. And write an io_schedule() function which then
(for now) just calls dev_dstrategy().
Step #2: Implement the process-based policy structure and system calls.
Step #3: Associate policy information with each BIO
Step #4: Build the dynamic instancing for the (policies x cdev_t) matrix.
Step #5: Start implementing the actual I/O scheduler algorithm
More information about the Kernel