From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pd0-f171.google.com (mail-pd0-f171.google.com [209.85.192.171]) by kanga.kvack.org (Postfix) with ESMTP id 441836B004D for ; Sat, 15 Mar 2014 08:31:24 -0400 (EDT) Received: by mail-pd0-f171.google.com with SMTP id r10so3672282pdi.30 for ; Sat, 15 Mar 2014 05:31:23 -0700 (PDT) Received: from mail-pb0-x22c.google.com (mail-pb0-x22c.google.com [2607:f8b0:400e:c01::22c]) by mx.google.com with ESMTPS id p2si8666508pbn.183.2014.03.15.05.31.22 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sat, 15 Mar 2014 05:31:23 -0700 (PDT) Received: by mail-pb0-f44.google.com with SMTP id rp16so3787466pbb.3 for ; Sat, 15 Mar 2014 05:31:22 -0700 (PDT) MIME-Version: 1.0 Reply-To: mtk.manpages@gmail.com In-Reply-To: <20140315092455.GA6018@infradead.org> References: <1394812471-9693-1-git-send-email-psusi@ubuntu.com> <532417CA.1040300@gmail.com> <20140315092455.GA6018@infradead.org> From: "Michael Kerrisk (man-pages)" Date: Sat, 15 Mar 2014 13:31:02 +0100 Message-ID: Subject: Re: [PATCH] readahead.2: don't claim the call blocks until all data has been read Content-Type: text/plain; charset=ISO-8859-1 Sender: owner-linux-mm@kvack.org List-ID: To: Christoph Hellwig Cc: Phillip Susi , linux-man , "linux-mm@kvack.org" , linux-ext4@vger.kernel.org, Corrado Zoccolo , "Gregory P. Smith" , Zhu Yanhai 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/ -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org