Have a kernel.org bugzilla entry to track the bug.
I noticed yesterday that a write to fallocate
space via directIO results in fallback to buffer_IO. ie the userspace
pages get copied to the page cache and then call a sync.
I guess this defeat the purpose of using directIO. May be we should
consider this a high priority bug.
This is all fixed with mingming's patches now, right?
yes ,with the changes from mingming we should be able to close the bug