From: Wu Fengguang <fengguang.wu@intel.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Quentin Barnes <qbarnes+nfs@yahoo-inc.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
Nick Piggin <npiggin@suse.de>,
Steven Whitehouse <swhiteho@redhat.com>
Subject: Re: [RFC][PATCH 2/2] readahead: avoid page-by-page reads on POSIX_FADV_RANDOM
Date: Thu, 31 Dec 2009 11:03:11 +0800 [thread overview]
Message-ID: <20091231030311.GA12517@localhost> (raw)
In-Reply-To: <20091231025343.GA11327@localhost>
On Thu, Dec 31, 2009 at 10:53:43AM +0800, Wu Fengguang wrote:
> So how about add a FMODE_HINT_RANDOM_READ bit to file->f_mode?
> Modifying it at fadvise() time at least won't disturb the existing
> open-time-modify-only f_mode bits..
Ah it seems file->f_flags (modified under f_lock) is ideal candidate :)
Thanks,
Fengguang
next prev parent reply other threads:[~2009-12-31 3:03 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-25 0:07 [RFC][PATCH] Disabling read-ahead makes I/O of large reads small Quentin Barnes
2009-12-29 18:04 ` Andi Kleen
2009-12-30 5:15 ` Wu Fengguang
2009-12-30 5:17 ` [RFC][PATCH 1/2] readahead: replace ra->mmap_miss with ra->flags Wu Fengguang
2009-12-30 5:24 ` [RFC][PATCH 2/2] readahead: avoid page-by-page reads on POSIX_FADV_RANDOM Wu Fengguang
2009-12-30 18:02 ` Andi Kleen
2009-12-31 1:39 ` Wu Fengguang
2009-12-31 2:53 ` Wu Fengguang
2009-12-31 3:03 ` Wu Fengguang [this message]
2009-12-31 4:31 ` [RFC][PATCH v2] readahead: introduce O_RANDOM_READ for POSIX_FADV_RANDOM Wu Fengguang
2010-01-08 13:08 ` Christoph Hellwig
2010-01-09 13:59 ` Wu Fengguang
2010-01-09 14:01 ` Wu Fengguang
2010-01-04 4:50 ` [RFC][PATCH v3] readahead: introduce O_RANDOM " Wu Fengguang
2010-01-04 5:17 ` Stephen Rothwell
2010-01-04 7:33 ` Christoph Hellwig
2010-01-04 12:56 ` [RFC][PATCH v4] " Wu Fengguang
2010-01-05 2:03 ` Stephen Rothwell
2010-01-05 2:26 ` Wu Fengguang
2010-01-05 2:28 ` Stephen Rothwell
2010-01-05 2:45 ` Wu Fengguang
2010-01-05 5:21 ` Eric Paris
2010-01-05 3:18 ` [RFC][PATCH v5] " Wu Fengguang
2010-01-05 3:27 ` Wu Fengguang
2010-01-04 16:50 ` [RFC][PATCH v3] " Quentin Barnes
2010-01-04 18:57 ` Andreas Dilger
2010-01-04 5:20 ` Minchan Kim
2010-01-04 5:20 ` Minchan Kim
2010-01-04 12:16 ` Wu Fengguang
2010-01-05 1:46 ` Minchan Kim
2010-01-05 1:46 ` Minchan Kim
2010-01-05 2:16 ` Wu Fengguang
2010-01-05 3:40 ` Minchan Kim
2010-01-05 3:40 ` Minchan Kim
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