Hello Martin, This is a legacy issue that was apparently present in the previous version 30200 as well. I am still in the process of trying to reproduce it. Will update once I get any results. Regards, Raghava Aditya > -----Original Message----- > From: Martin K. Petersen [mailto:martin.petersen@xxxxxxxxxx] > Sent: Tuesday, February 23, 2016 6:14 PM > To: Raghava Aditya Renukunta > Cc: Roger Willcocks; linux-scsi@xxxxxxxxxxxxxxx > Subject: Re: aacraid: ioctl hang (4.5-rc4) > > >>>>> "Roger" == Roger Willcocks <roger@xxxxxxxxxxxxxxxx> writes: > > Raghava, > > This appears to be a regression after the latest update... > > Roger> I've see this on multiple machines here with various kernels and > Roger> hardware configurations, the most canonical being: > > Roger> hardware: HP Z840 + ASR8405 (4 x HGST raid 6 formatted as xfs) > > Roger> Z840 firmware: v01.16 ASR8405 firmware: 7.8-0 (32730) > > Roger> kernel: 4.5.4.rc4 tip with command line options 'ro single' > > Roger> (Adaptec driver 1.2-1 (41024)) > > Roger> However the same thing happens with 2 and 4 x ASR81605ZQ on a > Roger> Supermicro motherboard with the Adaptec 1.2.1-40300 driver. The > Roger> 30200 driver, fwiw, causes a kernel panic (page fault in > Roger> aac_intr_normal). > > Roger> To reproduce, queue up a bunch of write requests: > > Roger> # dd if=/dev/zero of=/file/on/raid & > > Roger> then in a loop, run 'arcconf getversion' repeatedly. I'm using > Roger> arcconf 1.7 (B21229) > > Roger> Within thirty seconds or so (less than 100 repeats) arcconf hangs > Roger> with userspace stack: > > Roger> #0 0x00007f60103a9a47 in ioctl () from /lib64/libc.so.6 #1 > Roger> 0x000000000059f4bc in faos_SendReceiveFIB(FSAAPI_CONTEXT*, > _FIB*, > Roger> unsigned int) () #2 0x000000000056de3f in > Roger> FsaInternalSendReceiveFib(FSAAPI_CONTEXT*, _FIB*, int, unsigned > Roger> int) () #3 0x000000000058da76 in FsaGetAdapterSasPhyInfo () #4 > Roger> 0x00000000004f97ea in ArcAdapter::initSasPhyInfo(Ret&) () #5 > Roger> 0x0000000000507516 in ArcAdapter::buildChildren(Ret&) () #6 > Roger> 0x0000000000533486 in ArcSystem::buildChildren(StorLib*, Ret&) () > Roger> #7 0x0000000000492170 in StorLib::getSystemConfig() () #8 > Roger> 0x00000000004289c0 in main () > > Roger> The kernel's stuck in down_interruptible() called from > Roger> aac_fib_send(). ^C releases it (but you can repeat the > Roger> experiment.) > > Roger> I've done a small amount of digging and afaict the controller > Roger> issues an interrupt when the request completes, but the driver > Roger> doesn't call up() because the XFerState in the reply doesn't > Roger> match to the request. > > Roger> sent: 1010a1 rcvd: 804832ad > > Roger> I don't really know enough about the controller protocol to debug > Roger> this further. > > Roger> First things first I'd be grateful if somebody could confirm the > Roger> hang. > > -- > Martin K. Petersen Oracle Linux Engineering -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
