Re: [PATCH 0/21] SCSI target patches for kernel v4.2

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On Thu, 2015-05-21 at 11:39 +0200, Bart Van Assche wrote:
> On 05/21/15 11:21, Nicholas A. Bellinger wrote:
> > Really, this series is not even close to being functionally correct.
> 
> Hello Nic,
> 
> The current approach for handling task management functions in the LIO 
> core triggers many race conditions. Fixing these is impossible without 
> either introducing additional locking or doing what I did - moving task 
> management function handling from the context that processes the TMF to 
> the command execution context. The approach in this patch series has the 
> advantage that it makes the TMF handling code much easier to read and to 
> verify.

The series is wrong on many levels, and I'm more than happy to comment
on them individually.

Using a fabric like FoCE that hardly anyone cares about as your vehicle
for rewriting core TMR logic is not going to be enough of a reason.

You'll need to focus on iscsi-target and tcm_qla2xxx specifically with
real workloads and backend configurations to prove the changes are
functionally correct beyond simple VM tests, otherwise I'm not even
going to consider these type of changes.

--nab

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