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21:26:31 +0000 Subject: Re: [PATCH 08/10] Handle "show remote memory-write-packet-size" when not connected To: Pedro Alves , References: <20180516141830.16859-1-palves@redhat.com> <20180516141830.16859-9-palves@redhat.com> From: Simon Marchi Message-ID: <28ff1dac-fa38-6e19-fd0e-b4aed7e1832f@ericsson.com> Date: Fri, 18 May 2018 21:42:00 -0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: <20180516141830.16859-9-palves@redhat.com> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: SN4PR0501CA0113.namprd05.prod.outlook.com (2603:10b6:803:42::30) To DM6PR15MB2394.namprd15.prod.outlook.com (2603:10b6:5:8d::28) X-MS-PublicTrafficType: Email X-Microsoft-Antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(4652020)(4534165)(4627221)(201703031133081)(201702281549075)(5600026)(2017052603328)(7153060)(7193020);SRVR:DM6PR15MB2394; X-Microsoft-Exchange-Diagnostics: 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1;DM6PR15MB2394;7:/DaNoxiT09hhtwCrPFhx3dii2BQCRxc0ZsPYg+4XXqfR9Ats1CGVUZRlw/XZcUOOtVcWKKjWXTIOOWxy4QHDaGO072UQOf/H0rvgrxd17oVtcuyAexOv/OyNLvN/O9nc6sG7ZtXWyQv4lRfHp7Khm9SxCjBLUog8k7uskl0y1O1stH2lOkUg+ttzqc8PUA0JbDQzzejMZQZg5t/4DQ9n+Xu97+I/NKL7IBEj7yJNBWZ96M/I/mEaJjxnVreSzC0D X-MS-Office365-Filtering-Correlation-Id: 9f1a1fd2-1561-4293-ce0f-08d5bd060651 X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 May 2018 21:26:31.2833 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 9f1a1fd2-1561-4293-ce0f-08d5bd060651 X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 92e84ceb-fbfd-47ab-be52-080c6b87953f X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR15MB2394 X-OriginatorOrg: ericsson.com X-IsSubscribed: yes X-SW-Source: 2018-05/txt/msg00428.txt.bz2 On 2018-05-16 10:18 AM, Pedro Alves wrote: > Currently "show remote memory-write-packet-size" says that the packet > size is limited to whatever is stored in the remote_state global, even > if not connected to a target. > > When we get to support multiple instances of remote targets, there > won't be a remote_state global anymore, so that must be replaced by > something else. > > Since it doesn't make sense to print the limit of the packet size of a > non-existing connection, this patch makes us say that the limit will > be further reduced when we connect. > > The text is taken from the command's online help, which says: > > "The actual limit is further reduced dependent on the target." The result sounds a bit weird: (gdb) show remote memory-read-packet-size The memory-read-packet-size is 0. The actual limit will be further reduced dependent on the target. (gdb) show remote memory-write-packet-size The memory-write-packet-size is 0. The actual limit will be further reduced dependent on the target. How can the limit be reduced if it is zero? I don't really know about this code, is zero a special value that means no limit? Perhaps it should be handled differently to make the message clearer. Simon