On Sun, Oct 06 2013, Christoph Hellwig wrote: > blk_flush_plug_list became a bit of a mess with the introduction of blk-mq, > so I started looking into separating the blk-mq handling from it. Turns > out that by doing this we can streamline the blk-mq submission path a lot. > > If we branch out to a blk-mq specific code path early we can do the list sort > based on the hw ctx instead of the queue and thus avoid the later improvised > loop to sort again. In addition we can also remove the hw irq disabling in > the submission path entirely and collapse a couple of functions in blk-mq.c, > all at the cost of an additional list_head in struct blk_plug which can go > away again as soon as we remove old-school request_fn based drivers.
Thanks, I'll take a look at this. The plugging was done mostly hacky when implementing it, it was meant to be revisited. So definitely room for improvement there. -- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
