From: "Michael Kerrisk (man-pages)" Subject: Re: [PATCH] readahead.2: don't claim the call blocks until all data has been read Date: Sat, 15 Mar 2014 13:31:02 +0100 Message-ID: References: <1394812471-9693-1-git-send-email-psusi@ubuntu.com> <532417CA.1040300@gmail.com> <20140315092455.GA6018@infradead.org> Reply-To: mtk.manpages@gmail.com Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Cc: Phillip Susi , linux-man , "linux-mm@kvack.org" , linux-ext4@vger.kernel.org, Corrado Zoccolo , "Gregory P. Smith" , Zhu Yanhai To: Christoph Hellwig Return-path: Received: from mail-pd0-f177.google.com ([209.85.192.177]:39376 "EHLO mail-pd0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755336AbaCOMbX (ORCPT ); Sat, 15 Mar 2014 08:31:23 -0400 In-Reply-To: <20140315092455.GA6018@infradead.org> Sender: linux-ext4-owner@vger.kernel.org List-ID: On Sat, Mar 15, 2014 at 10:24 AM, Christoph Hellwig wrote: > On Sat, Mar 15, 2014 at 10:05:14AM +0100, Michael Kerrisk (man-pages) wrote: >> However, it may block while it reads >> the filesystem metadata needed to locate the requested blocks. >> This occurs frequently with ext[234] on large files using indi??? >> rect blocks instead of extents, giving the appearence that the >> call blocks until the requested data has been read. >> >> Okay? > > The part above is something that should be in the BUGS section. Good call. Done. Thanks, Christoph. Cheers, Michael -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/