https://bugzilla.kernel.org/show_bug.cgi?id=208605 Bug ID: 208605 Summary: AACRAID frequent hos bus reset with intensive IO on large arrays Product: SCSI Drivers Version: 2.5 Kernel Version: 4.14 - 5.7.8 Hardware: x86-64 OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: AACRAID Assignee: scsi_drivers-aacraid@xxxxxxxxxxxxxxxxxxxx Reporter: janpieter.sollie@xxxxxxxxx Regression: No Created attachment 290345 --> https://bugzilla.kernel.org/attachment.cgi?id=290345&action=edit quick and dirty patch to fix the issue On a large array (>15 drives), it is impossible to backup the storage to a SAS tape without the driver detecting a lockup, and causing a bus reset. This seems to be a false detection, as the host controller actually is not locking up anything. It's just a bit delayed. This issue seems to go back to 4.14. I reverted some cleanup stuff introduced in 4.14, and the driver is working correctly. I attached a patch for it, but this is just to show where the bug may be, it is not ready for production (though it works, but this may be for 7 series only). I also have no idea what exactly causes this issue Bug observed on a series 7 controller with a 12-drive RAID6 array. -- You are receiving this mail because: You are watching the assignee of the bug.
