On 23.03.2011 20:32, Chris Mason wrote:
Excerpts from Arne Jansen's message of 2011-03-23 09:06:02 -0400:
For the implementation I'd need an interface which I haven't been able
to find yet. Currently I can trigger the read of several pages / tree
blocks and wait for the completion of each of them. What I'd need would
be an interface that gives me a callback on each completion or a waiting
function that wakes up on each completion with the information which
pages just completed.
One way to achieve this would be to add a hook, but I gladly take any
implementation hints.
We have the bio endio call backs for this, I think that's the only thing
you can use.
ok, so I'll add a new extent state bit EXTENT_READAHEAD and test for it
in btree_readpage_end_io_hook.
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