From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@bugzilla.kernel.org Subject: [Bug 121531] Adaptec 7805H SAS HBA (pm80xx): hangs when writing >80MB at once Date: Tue, 25 Oct 2016 23:03:27 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT Return-path: Received: from mail.kernel.org ([198.145.29.136]:38298 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754120AbcJYXDb (ORCPT ); Tue, 25 Oct 2016 19:03:31 -0400 Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 18F9620117 for ; Tue, 25 Oct 2016 23:03:30 +0000 (UTC) Received: from bugzilla2.web.kernel.org (bugzilla2.web.kernel.org [172.20.200.52]) by mail.kernel.org (Postfix) with ESMTP id EBE9620376 for ; Tue, 25 Oct 2016 23:03:27 +0000 (UTC) In-Reply-To: Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: linux-scsi@vger.kernel.org https://bugzilla.kernel.org/show_bug.cgi?id=121531 --- Comment #18 from ChloƩ Desoutter --- Actually further MicroSemi driver analysis lets me think that the proper, recommended value is 256. $ egrep '#define\s+MAX_[IO]B_QUEUE_ELEMENTS' *.h pm8001_sas.h:#define MAX_IB_QUEUE_ELEMENTS 256 pm8001_sas.h:#define MAX_OB_QUEUE_ELEMENTS 256 so I shall test with this value for PM8001_MPI_QUEUE and see if I achieve real stability with constant workloads. -- You are receiving this mail because: You are the assignee for the bug.