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Date: Wed, 4 Jun 2014 07:58:03 -0700 From: Christoph Hellwig <hch@...radead.org> To: Jens Axboe <axboe@...nel.dk> Cc: Christoph Hellwig <hch@...radead.org>, Shaohua Li <shli@...nel.org>, linux-kernel@...r.kernel.org Subject: Re: [patch]blk-mq: blk_mq_tag_to_rq should handle flush request On Wed, Jun 04, 2014 at 08:54:23AM -0600, Jens Axboe wrote: > >It's not as simple as the added code wants to get a queue from the > >hwctx, which we can't get at. I was planning to look into this, but > >there are various other regressions in the recent block updates that I > >need to fix before I can even test a tree with this one reverted. > > Which regressions? Performance or crashes? Both. I've tracked down the SCSI boot crash and you'll have a patch for that soon, still working on bisecting the performance crawl, but I'm getting close. > >If you can get to sorting this out soon I'd love you to handle it, > >otherwise I'll look into it as soon as I can. > > Just took a look at it, but I don't see the problematic path. I'm > looking at wip-9. scsi_mq_find_tag only gets the scsi host, which may have multiple queues. When called from scsi_find_tag we actually have a scsi device, so that's not an issue, but when called from scsi_host_find_tag the driver only provides the host. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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