Hi,everybody,
I do not know the KVA real means what. From internet, I only know it is
kernel address space.
In buf structure, there are two members about KVA - b_kvabase & b_kvasize;
And when the buf management works, it will remove/add a buf from one queue
to another, one instance, based on b_kvasize, a buf can be moved form
QUEUE_DIRTY to QUEUE_EMPTYKVA or QUEUE_EMPTY(i.e: brelse function). So, what
is the difference between the two empty queue? Another question, the buf
queues have one QUEUE_NONE queue, I do not know how the QUEUE_NONE queue
works. When buf init, all buffers will be added to QUEUE_EMPTY.
I reference the 5.0RC2 source.
Thank you!
Best Regards
Ouyang Kai
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