On Mon, Oct 2, 2017 at 10:32 PM, Hannes Reinecke <hare@xxxxxxx> wrote: > On 09/27/2017 09:33 AM, Gavin Guo wrote: >> There is a problem in the latest upstream kernel with the device: >> >> $ grep -i lsi lspci >> 03:00.0 Serial Attached SCSI controller [0107]: LSI Logic / Symbios >> Logic SAS1068 PCI-X Fusion-MPT SAS [1000:0054] (rev 01) >> >> The device is simulated by the VMware ESXi 5.5 >> >> When hotplugging a new disk to the Guest Ubuntu OS, the latest kernel >> cannot automatically probe the disk. However, on the v3.19.0-80.88 >> kernel, the disk can be dynamically probed and show the following >> info message: >> >> mptsas: ioc0: attaching ssp device: fw_channel 0, fw_id 1, phy 1, >> sas_addr 0x5000c29a6bdae0f5 >> scsi 2:0:1:0: Direct-Access VMware Virtual disk 1.0 PQ: 0 >> ANSI: 2 >> sd 2:0:1:0: Attached scsi generic sg2 type 0 >> sd 2:0:1:0: [sdb] 2097152 512-byte logical blocks: (1.07 GB/1.00 GiB) >> sd 2:0:1:0: [sdb] Write Protect is off >> sd 2:0:1:0: [sdb] Mode Sense: 61 00 00 00 >> sd 2:0:1:0: [sdb] Cache data unavailable >> sd 2:0:1:0: [sdb] Assuming drive cache: write through >> sdb: unknown partition table >> sd 2:0:1:0: [sdb] Attached SCSI disk >> >> After looking up the message: >> mptsas: ioc0: attaching ssp device: fw_channel 0, fw_id 1, phy 1, >> sas_addr 0x5000c29a6bdae0f5 >> >> I found it comes from the path: >> mptsas_firmware_event_work -> mptsas_send_sas_event -> >> mptsas_hotplug_work -> mptsas_add_end_device >> >> I'll appreciate if anyone can give the idea: If it's possible that the >> irq from the simulated LSI SAS controller didn't come in to trigger >> the event? However, it can work on the v3.19 kernel so if there is >> any driver implementation issue in the latest kernel. >> > This is an issue with the mptsas driver, who originally assumed that no > system will have direct-attached SAS devices. > VMWare chose to implement exactly that, so the hotplug detection logic > is flawed here. > I'll be sending a patch. > > Cheers, > > Hannes > -- > Dr. Hannes Reinecke Teamlead Storage & Networking > hare@xxxxxxx +49 911 74053 688 > SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg > GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton > HRB 21284 (AG Nürnberg) Thank you in advance. Please add me to the CC list when you send out the patch and I can help to verify that.
