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References: <20190829001735.30289-1-vishal.l.verma@intel.com>
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From: Dan Williams <dan.j.williams@intel.com>
Date: Thu, 29 Aug 2019 11:28:29 -0700
Message-ID: <CAPcyv4iQ8=yLGA0E2=puqV+mC7HxNW-RP-0EtVeU2hN6HsNxKQ@mail.gmail.com>
Subject: Re: [ndctl PATCH 3/3] ndctl/namespace: add a --continue option to
 create namespaces greedily
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To: "Verma, Vishal L" <vishal.l.verma@intel.com>
Cc: "Scargall, Steve" <steve.scargall@intel.com>, "linux-nvdimm@lists.01.org" <linux-nvdimm@lists.01.org>
List-ID: <linux-nvdimm@lists.01.org>

On Thu, Aug 29, 2019 at 11:08 AM Verma, Vishal L
<vishal.l.verma@intel.com> wrote:
>
> On Thu, 2019-08-29 at 10:38 -0700, jane.chu@oracle.com wrote:
> > Hi, Vishal,
> >
> >
> > On 8/28/19 5:17 PM, Vishal Verma wrote:
> > > Add a --continue option to ndctl-create-namespaces to allow the creation
> > > of as many namespaces as possible, that meet the given filter
> > > restrictions.
> > >
> > > The creation loop will be aborted if a failure is encountered at any
> > > point.
> >
> > Just wondering what is the motivation behind providing this option?
>
> Hi Jane,
>
> See Steve's email here:
> https://lists.01.org/pipermail/linux-nvdimm/2019-August/023390.html
>
> Essentially it lets sysadmins create a simple, maximal configuration
> without everyone having to script it.

It also gives a touch point to start thinking about parallel namespace
creation. The large advancements in boot time that Alex achieved were
mainly from parallelizing namespace init. With --continue we could
batch the namespace enable calls and kick off a bind thread per
namespace.
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