From: Phillip Susi <psusi@cfl.rr.com>
To: linux-fsdevel@vger.kernel.org,
Linux-kernel <linux-kernel@vger.kernel.org>
Subject: readahead on directories
Date: Mon, 19 Apr 2010 11:51:33 -0400 [thread overview]
Message-ID: <4BCC7C05.8000803@cfl.rr.com> (raw)
I have been trying to improve boot times with ureadahead and have
identified a period of time of almost zero IO throughput caused by calls
to open() blocking during name lookup while fetching directory blocks.
At first I thought this could simply be fixed by calling readahead() on
the directories first before open()ing all of the normal files for
readahead.
Unfortunately it seems that readahead() fails when called on a
directory. I was wondering if I could get some help understanding why
this is, and how it could be fixed.
next reply other threads:[~2010-04-19 15:51 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-19 15:51 Phillip Susi [this message]
2010-04-21 0:44 ` readahead on directories Jamie Lokier
2010-04-21 14:57 ` Phillip Susi
2010-04-21 16:12 ` Jamie Lokier
2010-04-21 18:10 ` Phillip Susi
2010-04-21 20:22 ` Jamie Lokier
2010-04-21 20:59 ` Phillip Susi
2010-04-21 22:06 ` Jamie Lokier
2010-04-22 7:01 ` Brad Boyer
2010-04-22 14:26 ` Phillip Susi
2010-04-22 17:53 ` Jamie Lokier
2010-04-22 19:23 ` Phillip Susi
2010-04-22 20:35 ` Jamie Lokier
2010-04-22 21:22 ` Phillip Susi
2010-04-22 22:43 ` Jamie Lokier
2010-04-23 4:13 ` Phillip Susi
2010-04-21 18:38 ` Evgeniy Polyakov
2010-04-21 18:51 ` Jamie Lokier
2010-04-21 18:56 ` Evgeniy Polyakov
2010-04-21 20:02 ` Jamie Lokier
2010-04-21 20:21 ` Evgeniy Polyakov
2010-04-21 20:39 ` Jamie Lokier
2010-04-21 19:23 ` Phillip Susi
2010-04-21 20:01 ` Jamie Lokier
2010-04-21 20:13 ` Phillip Susi
2010-04-21 20:37 ` Jamie Lokier
2010-05-07 13:38 ` unified page and buffer cache? (was: readahead on directories) Phillip Susi
2010-05-07 13:53 ` Matthew Wilcox
2010-05-07 15:45 ` unified page and buffer cache? Phillip Susi
2010-05-07 18:30 ` Matthew Wilcox
2010-05-08 0:50 ` Phillip Susi
2010-05-08 0:46 ` tytso
2010-05-08 0:54 ` Phillip Susi
2010-05-08 12:52 ` tytso
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