From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 878322F37 for ; Mon, 7 Nov 2022 20:23:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1667852622; x=1699388622; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=ZNQpSdbft8os7UBc1T7ie740D4/M6gAht1R7k+2zG14=; b=HhHhPpG/2ISEY0TfWiiXKyR1jzo9wWlVYVeBZv7sPF4AJkNCVB1GRVkj sc4ltoEqDi9RJSk39m4K4vDBcPSHzcLzbWXeVD52FPeJCsabjMcL6O7n/ eYSWLakBJF4IxS5wvgfR/w2mvCQf7ebVywhzfXxtvzhlWULO12EgDTjUt 5X877hfcAPM5sACj1briepP7GG6MmIWr87wTOJK3dnJ984zjfB7QL+5pp +/MkajZ6sV6Ni6WZf/HSR12ejUMy7tjA1Om8y0K7N87iXaubjNh2ZlRyF fBqYNeVDvbgXWpfXIw50qD0O1isaCiF13YSHJdmlVv3aERLheoxN+7gHZ g==; X-IronPort-AV: E=McAfee;i="6500,9779,10524"; a="308140586" X-IronPort-AV: E=Sophos;i="5.96,145,1665471600"; d="scan'208";a="308140586" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Nov 2022 12:23:42 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10524"; a="725290475" X-IronPort-AV: E=Sophos;i="5.96,145,1665471600"; d="scan'208";a="725290475" Received: from aschofie-mobl2.amr.corp.intel.com (HELO aschofie-mobl2) ([10.209.100.77]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Nov 2022 12:23:41 -0800 Date: Mon, 7 Nov 2022 12:23:39 -0800 From: Alison Schofield To: Dan Williams Cc: vishal.l.verma@intel.com, linux-cxl@vger.kernel.org, nvdimm@lists.linux.dev Subject: Re: [ndctl PATCH 06/15] cxl/list: Skip emitting pmem_size when it is zero Message-ID: References: <166777840496.1238089.5601286140872803173.stgit@dwillia2-xfh.jf.intel.com> <166777844020.1238089.5777920571190091563.stgit@dwillia2-xfh.jf.intel.com> Precedence: bulk X-Mailing-List: nvdimm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <166777844020.1238089.5777920571190091563.stgit@dwillia2-xfh.jf.intel.com> On Sun, Nov 06, 2022 at 03:47:20PM -0800, Dan Williams wrote: > The typical case is that CXL devices are pure ram devices. Only emit > capacity sizes when they are non-zero to avoid confusion around whether > pmem is available via partitioning or not. > > Do the same for ram_size on the odd case that someone builds a pure pmem > device. Maybe a few more words around what confusion this seeks to avoid. The confusion being that a user may assign more meaning to the zero size value than it actually deserves. A zero value for either pmem or ram, doesn't indicate the devices capability for either mode. Use the -I option to cxl list to include paritition info in the memdev listing. That will explicitly show the ram and pmem capabilities of the device. > > Signed-off-by: Dan Williams > --- > cxl/json.c | 20 +++++++++++++------- > 1 file changed, 13 insertions(+), 7 deletions(-) > > diff --git a/cxl/json.c b/cxl/json.c > index 63c17519aba1..1b1669ab021d 100644 > --- a/cxl/json.c > +++ b/cxl/json.c > @@ -305,7 +305,7 @@ struct json_object *util_cxl_memdev_to_json(struct cxl_memdev *memdev, > { > const char *devname = cxl_memdev_get_devname(memdev); > struct json_object *jdev, *jobj; > - unsigned long long serial; > + unsigned long long serial, size; > int numa_node; > > jdev = json_object_new_object(); > @@ -316,13 +316,19 @@ struct json_object *util_cxl_memdev_to_json(struct cxl_memdev *memdev, > if (jobj) > json_object_object_add(jdev, "memdev", jobj); > > - jobj = util_json_object_size(cxl_memdev_get_pmem_size(memdev), flags); > - if (jobj) > - json_object_object_add(jdev, "pmem_size", jobj); > + size = cxl_memdev_get_pmem_size(memdev); > + if (size) { > + jobj = util_json_object_size(size, flags); > + if (jobj) > + json_object_object_add(jdev, "pmem_size", jobj); > + } > > - jobj = util_json_object_size(cxl_memdev_get_ram_size(memdev), flags); > - if (jobj) > - json_object_object_add(jdev, "ram_size", jobj); > + size = cxl_memdev_get_ram_size(memdev); > + if (size) { > + jobj = util_json_object_size(size, flags); > + if (jobj) > + json_object_object_add(jdev, "ram_size", jobj); > + } > > if (flags & UTIL_JSON_HEALTH) { > jobj = util_cxl_memdev_health_to_json(memdev, flags); >