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Re: [Qemu-devel] [ndctl PATCH 0/8] dimm label space initialization suppo
From: |
Dan Williams |
Subject: |
Re: [Qemu-devel] [ndctl PATCH 0/8] dimm label space initialization support |
Date: |
Wed, 19 Oct 2016 12:41:54 -0700 |
On Wed, Oct 19, 2016 at 11:42 AM, Eric Blake <address@hidden> wrote:
> On 10/19/2016 11:47 AM, Dan Williams wrote:
>> The 4.9 kernel added support for sub-dividing PMEM. With this kernel
>> patch [1] on top of that baseline, the PMEM-sub-division support can be
>> enabled for QEMU-KVM and any other platforms that advertise both un-aliased
>> PMEM regions and support for the label DSM commands [2].
>>
>> Given this increasing need to perform a label management operation
>> across a set of DIMMs this update also adds glob(3) support. For
>> example you can now write commands like:
>>
>> ndctl zero-labels nmem[2-4]
>
> This is slightly scary, as it depends on the user not having any file
> named nmem2, nmem3, or nmem4 in the current working directory. Your
> example should probably encourage proper shell quoting, as in:
>
> ndctl zero-labels 'nmem[2-4]'
True. Although, the glob is run against the list of present device
names in the system, so local files named nmem should change the
operation of the command.
Re: [Qemu-devel] [ndctl PATCH 0/8] dimm label space initialization support, Vishal Verma, 2016/10/20