Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750756AbWELAgp (ORCPT ); Thu, 11 May 2006 20:36:45 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750759AbWELAgo (ORCPT ); Thu, 11 May 2006 20:36:44 -0400 Received: from wr-out-0506.google.com ([64.233.184.225]:65370 "EHLO wr-out-0506.google.com") by vger.kernel.org with ESMTP id S1750756AbWELAgo (ORCPT ); Thu, 11 May 2006 20:36:44 -0400 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:from:to:subject:date:message-id:mime-version:content-type:content-transfer-encoding:x-mailer:in-reply-to:x-mimeole:thread-index; b=J6bvEYVzcS/eKLV0SsxWlfRL79+Cs/0gtxBZU0lU7/S6rlyCiMa+yTlcDe4xYUzjuGmq9EMZF0niJxnucDhKtbqO3fWFIypjzKkKwHETI9MG2n4MIcFSc21FbpGARO/3KUthhyRLgOLKgK5JtwuMZEjiYUsMqqjARbca5j2dKLU= From: "Hua Zhong" To: "=?ISO-8859-1?Q?'Dieter_St=FCken'?=" , Subject: RE: ext3 metadata performace Date: Thu, 11 May 2006 17:36:41 -0700 Message-ID: <002501c6755c$24306430$493d010a@nuitysystems.com> MIME-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Office Outlook 11 In-Reply-To: <4463461C.3070201@conterra.de> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2869 Thread-Index: AcZ1Bw/7aTbnn1UtQem2u1k4sFyRxgAVNkKQ Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 779 Lines: 19 > (3ware 9500S), which even has an battery buffered disk cache. > Thus there is no need for synchronous IO anyway. If I disable > the disk cache on my plain SATA disk using ext3, I also get > this behavior. If you mean the disk cache is reliable with the battery, then it should be done by the block layer that a write barrier doesn't translate into a SYNC (or whatever it is called). Instead, data is considered synced to disk as soon as it hits the cache. It's really nothing to do with EXT3. It's doing the right thing. Hua - 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/