Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964924AbVIEXHW (ORCPT ); Mon, 5 Sep 2005 19:07:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964925AbVIEXHW (ORCPT ); Mon, 5 Sep 2005 19:07:22 -0400 Received: from smtpout.mac.com ([17.250.248.83]:971 "EHLO smtpout.mac.com") by vger.kernel.org with ESMTP id S964924AbVIEXHW (ORCPT ); Mon, 5 Sep 2005 19:07:22 -0400 In-Reply-To: References: <4IcUz-7H2-27@gated-at.bofh.it> <4J2gx-3zf-3@gated-at.bofh.it> <4J5R1-cH-21@gated-at.bofh.it> <4J6ao-L9-21@gated-at.bofh.it> <4J6jZ-Xg-11@gated-at.bofh.it> <4J8vt-43Y-13@gated-at.bofh.it> Mime-Version: 1.0 (Apple Message framework v734) Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: <9E6A1734-A6B6-4189-9656-C252D677BB32@mac.com> Cc: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 7bit From: Kyle Moffett Subject: Re: RFC: i386: kill !4KSTACKS Date: Mon, 5 Sep 2005 19:06:58 -0400 To: Thorild Selen X-Mailer: Apple Mail (2.734) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1302 Lines: 39 On Sep 5, 2005, at 18:32:32, Thorild Selen wrote: > Adrian Bunk writes: >> Please name situations where 8K stacks may be preferred that do not >> involve binary-only modules. > > How about NFS-exporting a filesystem on LVM atop md? I believe it has > been mentioned before in discussions that 8k stacks are strongly > recommended in this case. Are those issues solved? I think the worst overflow case anyone found was nfs=>xfs=>lvm=>dm=>scsi, if someone has such a configuration, please retest with current -mm or similar. I think there are several patches in there to resolve the excessive stack usage and a few to do some sort of bio chaining (Instead of recursive calls). I don't remember what underlying hardware was behind the SCSI, but I suspect something like iSCSI or USB would push some extra stack in there for stress testing. Cheers, Kyle Moffett -- I have yet to see any problem, however complicated, which, when you looked at it in the right way, did not become still more complicated. -- Poul Anderson - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/