https://bugzilla.kernel.org/show_bug.cgi?id=191471 Bug ID: 191471 Summary: Mp2Sas and Mpt3Sas (now mpxsas) drivers are spinning forever in the IRQ handler under load condition Product: IO/Storage Version: 2.5 Kernel Version: 4.7 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: SCSI Assignee: linux-scsi@xxxxxxxxxxxxxxx Reporter: okaya@xxxxxxxxxxxxxx Regression: No When there are a lot of IO requests queued for the HW, the IRQ handler of the mpxsas driver spins forever until all requests are serviced. Spinning in the IRQ handler forever is a bad design and causes stalls on the other cores that is unrelated to this request. A simple solution has been posted here but rejected by the maintainer as the maintainer has been looking to offload only the slow path to task context. https://patchwork.kernel.org/patch/7579951/ Further requests for details to resolve the issue has been unanswered. Logging the issue here for awareness. -- You are receiving this mail because: You are the assignee for the bug. -- 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
