Re: [PATCH 0/6] blk-mq: initialize pdu of flush req explicitly

[Christoph Hellwig]

This works fine for me, although I still don't really like it very much.

If you really want to go down the path of major surgery in this area we
should probably allocate a flush request per hw_ctx, and initialize it
using the normal init/exit functions.  If we want to have proper multiqueue
performance on devices needing flushes we'll need something like that anyway.
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