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Re: [Xen-devel] [PATCH 2 of 2] libxl: publish number of shared and paged pages

  • To: "Ian Campbell" <Ian.Campbell@xxxxxxxxxx>
  • From: "Andres Lagar-Cavilla" <andres@xxxxxxxxxxxxxxxx>
  • Date: Tue, 13 Mar 2012 08:43:16 -0700
  • Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxx>
  • Delivery-date: Tue, 13 Mar 2012 15:43:30 +0000
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  • List-id: Xen developer discussion <xen-devel.lists.xen.org>

> On Tue, 2012-03-13 at 15:35 +0000, Ian Jackson wrote:
>> Andres Lagar-Cavilla writes ("Re: [Xen-devel] [PATCH 2 of 2] libxl:
>> publish number of shared and paged pages"):
>> > > But did you not want to print it from xl command or other?
>> >
>> > Not in xl list (format compat with xm list). Where?
>> Tricky.  Can you make the format compatible if paging is disabled ?
>> Ultimately the format of list is pretty annoying and inextensible.
> I was wondering if we should just bit the bullet and agree that only the
> machine readable "xl list -l" output is backwards compatible? Supporting
> machine parsing of the human readable "xl list" output is pretty
> limiting in many ways.
> The default for "xl list -l" is now json output (which is autogenerated
> and will therefore pickup new field automatically) but there is an
> option to use the xm sxp syntax too.
> If changing the machine readable output is actually impossible I suppose
> we could add a "--old-style" flag to ease the transition?

Happy to add the paging and sharing stats to the extended list format,
once a choice is made.

> Ian.

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