Re: [PATCH v1 06/14] xprtrdma: Acquire FMRs in rpcrdma_fmr_register_external()

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On 5/4/2015 8:57 PM, Chuck Lever wrote:
Acquiring 64 FMRs in rpcrdma_buffer_get() while holding the buffer
pool lock is expensive, and unnecessary because FMR mode can
transfer up to a 1MB payload using just a single ib_fmr.

Instead, acquire ib_fmrs one-at-a-time as chunks are registered, and
return them to rb_mws immediately during deregistration.

Transport reset is now unneeded for FMR. Each FMR is recovered
synchronously when its RPC is retransmitted.

Does this worth a separate patch? I don't see why the two
changes are together. Is there a dependency I'm missing?
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