Michal,
thanks for this...a couple of preliminary questions...
On Mon, Jun 17, 2013 at 4:10 PM, Michal Belczyk <[email protected]>wrote:
> The main idea behind it is to be able to quickly detect broken replica
> and switch over to another when used with any sort of mirror type device
> built on top of any number of nbd devices.
>
I'm wondering if a simpler change would have the same result. Namely, could
you just apply the xmit_timeout, as currently implemented, to the recvmsg
path (ignoring the timeout, of course, when no requests are queued). Is
there a case that this would not handle that the proposed patch handles?
They seem to be equivalent.
Also move nbd->pid modifications behind nbd->tx_lock wherever possible
> to avoid races between the concurrent nbd-client invocations.
>
Is there a bug related to this that you've seen, or is this just a
precaution?
Thanks,
Paul
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