linux-ext4 - Re: [PATCH] readahead.2: don't claim the call blocks until all data has been read

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Message-ID: <CAKgNAkgGZ-3U8PLKrZZ5KUWMmopd1B777_6ekva5ZpeXecEZ1g@mail.gmail.com>
Date:	Sat, 15 Mar 2014 13:31:02 +0100
From:	"Michael Kerrisk (man-pages)" <mtk.manpages@...il.com>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	Phillip Susi <psusi@...ntu.com>,
	linux-man <linux-man@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	linux-ext4@...r.kernel.org, Corrado Zoccolo <czoccolo@...il.com>,
	"Gregory P. Smith" <gps@...gle.com>,
	Zhu Yanhai <zhu.yanhai@...il.com>
Subject: Re: [PATCH] readahead.2: don't claim the call blocks until all data
 has been read

On Sat, Mar 15, 2014 at 10:24 AM, Christoph Hellwig <hch@...radead.org> 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/
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