From mboxrd@z Thu Jan 1 00:00:00 1970 From: Frederic TEMPORELLI Subject: increase SD_STATS ? Date: Fri, 19 Aug 2005 10:02:43 +0200 Message-ID: <43059223.4020205@ext.bull.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from ecfrec.frec.bull.fr ([129.183.4.8]:34528 "EHLO ecfrec.frec.bull.fr") by vger.kernel.org with ESMTP id S964918AbVHSICt (ORCPT ); Fri, 19 Aug 2005 04:02:49 -0400 Received: from localhost (localhost [127.0.0.1]) by ecfrec.frec.bull.fr (Postfix) with ESMTP id DB7AE19DEFB for ; Fri, 19 Aug 2005 10:02:47 +0200 (CEST) Received: from ecfrec.frec.bull.fr ([127.0.0.1]) by localhost (ecfrec.frec.bull.fr [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 09113-06 for ; Fri, 19 Aug 2005 10:02:46 +0200 (CEST) Received: from ecn002.frec.bull.fr (ecn002.frec.bull.fr [129.183.4.6]) by ecfrec.frec.bull.fr (Postfix) with ESMTP id 3DD0019D909 for ; Fri, 19 Aug 2005 10:02:46 +0200 (CEST) Received: from [127.0.0.1] (localhost [127.0.0.1]) by openx3.frec.bull.fr (Postfix) with ESMTP id 33C092B0E8 for ; Fri, 19 Aug 2005 10:02:43 +0200 (CEST) Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: linux-scsi@vger.kernel.org Hi, Due to SD_STATS=256 (/drivers/scsi/sd.c) there's a limit on the max /dev/sd devices. Now, we have a large FC fabric, with more than 3500 LUNs... => Of course, we have an Oops when an HBA is connected to the fabric (still sd.c, BUG in function sd_iostats_bump when sd>SD_STATS) What (bad) side-effects can be expected if we increase SD_STATS (4096 should be nice, may be 8192) ? Best regards. -- Frederic TEMPORELLI