Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1538123

Re: [PATCH] nvme: use the correct msix vector for each queue

Show all headers | View raw

On Wed, Dec 07, 2016 at 05:36:00PM -0500, Dan Streetman wrote:
> On Wed, Dec 7, 2016 at 5:44 PM, Keith Busch <keith.busch@intel.com> wrote:
> > pci_alloc_irq_vectors doesn't know you intend to make the first
> > vector special, so it's going to come up with a CPU affinity from
> > blk_mq_pci_map_queues that clashes with what you've programmed in the
> > IO completion queues.
> 
> I don't follow.  You're saying you mean to share cq_vector 0 between
> the admin queue and io queue 1?

I'm just saying that blk-mq's hctx mapping will end up choosing a queue
who's vector is mapped to a different CPU, and we don't want that.

We are currently sharing the first IO queue's interrupt vector with
the admin queue's on purpose. Are you saying there's something wrong
with that?

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH] nvme: use the correct msix vector for each queue Dan Streetman <ddstreet@ieee.org> - 2016-12-07 23:10 +0100
  Re: [PATCH] nvme: use the correct msix vector for each queue Keith Busch <keith.busch@intel.com> - 2016-12-07 23:40 +0100
    Re: [PATCH] nvme: use the correct msix vector for each queue Christoph Hellwig <hch@infradead.org> - 2016-12-07 23:50 +0100
      Re: [PATCH] nvme: use the correct msix vector for each queue Dan Streetman <ddstreet@ieee.org> - 2016-12-08 00:00 +0100
    Re: [PATCH] nvme: use the correct msix vector for each queue Dan Streetman <ddstreet@ieee.org> - 2016-12-07 23:50 +0100
      Re: [PATCH] nvme: use the correct msix vector for each queue Keith Busch <keith.busch@intel.com> - 2016-12-08 00:00 +0100
  Re: [PATCH] nvme: use the correct msix vector for each queue Keith Busch <keith.busch@intel.com> - 2016-12-07 23:40 +0100
    Re: [PATCH] nvme: use the correct msix vector for each queue Dan Streetman <ddstreet@ieee.org> - 2016-12-07 23:40 +0100

csiph-web