On 11/09/2017 06:44 PM, Christoph Hellwig wrote:
> This patch adds native multipath support to the nvme driver. For each
> namespace we create only single block device node, which can be used
> to access that namespace through any of the controllers that refer to it.
> The gendisk for each control
On Fri, Nov 10, 2017 at 05:52:36AM +0100, Christoph Hellwig wrote:
> > If we've CMIC capabilities, we'll use the subsys->instance; if we don't
> > have CMIC, we use the ctrl->instance.
> >
> > Since the two instances are independent of each other, they can create
> > duplicate names.
> >
> > To
On Thu, Nov 09, 2017 at 04:22:17PM -0500, Mike Snitzer wrote:
> Your 0th header speaks to the NVMe multipath IO path leveraging NVMe's
> lack of partial completion but I think it'd be useful to have this
> header (that actually gets committed) speak to it.
There is a comment above blk_steal_bios t
> If we've CMIC capabilities, we'll use the subsys->instance; if we don't
> have CMIC, we use the ctrl->instance.
>
> Since the two instances are independent of each other, they can create
> duplicate names.
>
> To fix, I think we'll need to always use the subsys instance for
> consistency if CO
On Thu, Nov 09 2017 at 12:44pm -0500,
Christoph Hellwig wrote:
> This patch adds native multipath support to the nvme driver. For each
> namespace we create only single block device node, which can be used
> to access that namespace through any of the controllers that refer to it.
> The gendisk
Ahh, I incorporated non-multipath disks into the mix and observing some
trouble. Details below:
On Thu, Nov 09, 2017 at 06:44:47PM +0100, Christoph Hellwig wrote:
> +#ifdef CONFIG_NVME_MULTIPATH
> + if (ns->head->disk) {
> + sprintf(disk_name, "nvme%dc%dn%d", ctrl->subsys->instance
Christoph,
> This patch adds native multipath support to the nvme driver. For each
> namespace we create only single block device node, which can be used
> to access that namespace through any of the controllers that refer to
> it. The gendisk for each controllers path to the name space still
>
On Thu, Nov 09, 2017 at 06:44:47PM +0100, Christoph Hellwig wrote:
> +config NVME_MULTIPATH
> + bool "NVMe multipath support"
> + depends on NVME_CORE
> + ---help---
> +This option enables support for multipath access to NVMe
> +subsystems. If this option is enabled onl
This patch adds native multipath support to the nvme driver. For each
namespace we create only single block device node, which can be used
to access that namespace through any of the controllers that refer to it.
The gendisk for each controllers path to the name space still exists
inside the kerne
