Some static code analysis: 1), looks not possbile in scsi request submit path - preempt is disabled for arm64 vivid - the timer is always added just before submitting to hardware - once it can't be submitted to hardware, the timer is disabled
2), another possibility is in ata's completion path - block request is always completed in softirq(scsi_done()->blk_complete_request()) - the softirq may be run from another CPU, which is triggered by IPI - but one atomic complete flag is used to monitor the request completion status (blk_mark_rq_complete()), so looks the timeout can't be caused by softirq delay schedule. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1469218 Title: HP ProLiant m400 Server sda timeout causes file system hang Status in linux package in Ubuntu: Triaged Bug description: While running stress-ng on a ProLiant m400 Server I managed to cause the disk controller to timeout which causes a file system hang. I am wondering if the timeout was causes because I completely overloaded the system causing it to be slow on ata handling times. I ran: stress-ng --all 64 -t 600 -v and the machine slowly clogged up with stress processes, and finally hit the hang. Had to reboot the system. Attached is a kernel log. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1469218/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
