Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760722AbYAKOOx (ORCPT ); Fri, 11 Jan 2008 09:14:53 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754069AbYAKOOm (ORCPT ); Fri, 11 Jan 2008 09:14:42 -0500 Received: from moutng.kundenserver.de ([212.227.126.183]:57973 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753836AbYAKOOl (ORCPT ); Fri, 11 Jan 2008 09:14:41 -0500 From: Bodo Eggert <7eggert@gmx.de> Subject: Re: [PATCH] Clustering indirect blocks in Ext3 To: Abhishek Rai , ak@muc.de, ebiederm@xmission.com, rdreier@cisco.com, gregkh@suse.de, airlied@skynet.ie, davej@redhat.com, mingo@elte.hu, tglx@linutronix.de, akpm@linux-foundation.org, arjan@infradead.org, ?missing.closing.'"' in token?"Barnes", Jesse , davem@davemloft.net, linux-kernel@vger.kernel.org, ?missing closing '"'.in.token?"Siddha"@vax.1wt.eu, Suresh B , Linus Torvalds Illegal-Object: Syntax error in To: address found on vger.kernel.org: To: ?missing closing '"' in token?"Barnes", Jesse , davem@davemloft.net, linux-kernel@vger.kernel.org, ?missing closing '"' in token?"Siddha" ^-extraneous tokens in address Illegal-Object: Syntax error in To: address found on vger.kernel.org: To: ?missing closing '"' in token?"Barnes", Jesse , davem@davemloft.net, linux-kernel@vger.kernel.org, ?missing closing '"' in token?"Siddha" ^-extraneous tokens in address Reply-To: 7eggert@gmx.de Date: Fri, 11 Jan 2008 15:12:16 +0100 References: <9q1CT-82L-3@gated-at.bofh.it> <9q3v2-2Br-3@gated-at.bofh.it> <9qgLE-7ds-21@gated-at.bofh.it> <9qjJx-3wE-9@gated-at.bofh.it> <9qm4D-70Q-1@gated-at.bofh.it> <9CQTt-7cr-27@gated-at.bofh.it> <9KcYS-46E-27@gated-at.bofh.it> User-Agent: KNode/0.10.4 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7Bit Message-Id: X-be10.7eggert.dyndns.org-MailScanner-Information: See www.mailscanner.info for information X-be10.7eggert.dyndns.org-MailScanner: Found to be clean X-be10.7eggert.dyndns.org-MailScanner-From: 7eggert@gmx.de X-Provags-ID: V01U2FsdGVkX1/DMXuKMeTEVc/gB7m8nddxPuUztmahDMl5CUg V7McaYeXOGJRvfN7U1a1vqqtF6R/Qh2I0+asLEqAg7qsIXgdCR IVDu95eHCzG44hANYpkiA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 848 Lines: 13 Abhishek Rai wrote: > Putting metacluster at the end of the block group gives slightly > inferior sequential read throughput compared to putting it in the > beginning or the middle, but the difference is very tiny and exists > only for large files that span multiple block groups. Just an idea: What about putting it into the end of the previous block group (except for the first group, off cause) and starting to read the block group a little earlier (readahead/~before)? I imagine it might be about as good as placing it at the beginning while avoiding the fragmentation. -- 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/