From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
To: "linux-ext4@vger.kernel.org" <linux-ext4@vger.kernel.org>,
Theodore Tso <tytso@mit.edu>, Eric Sandeen <sandeen@redhat.com>,
Andreas Dilger <adilger@sun.com>
Subject: Fallocate and DirectIO
Date: Fri, 12 Jun 2009 18:01:12 +0530 [thread overview]
Message-ID: <20090612123112.GB25239@skywalker> (raw)
Hi,
I noticed yesterday that a write to fallocate
space via directIO results in fallback to buffer_IO. ie the userspace
pages get copied to the page cache and then call a sync.
I guess this defeat the purpose of using directIO. May be we should
consider this a high priority bug.
-aneesh
next reply other threads:[~2009-06-12 12:31 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-12 12:31 Aneesh Kumar K.V [this message]
2009-06-12 17:33 ` Fallocate and DirectIO Theodore Tso
2009-07-22 1:27 ` Curt Wohlgemuth
2009-07-23 15:56 ` Curt Wohlgemuth
2009-07-24 0:56 ` Mingming
2009-07-24 16:30 ` Curt Wohlgemuth
2009-07-24 18:02 ` Aneesh Kumar K.V
2009-07-24 18:18 ` Curt Wohlgemuth
2009-07-24 18:40 ` Aneesh Kumar K.V
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20090612123112.GB25239@skywalker \
--to=aneesh.kumar@linux.vnet.ibm.com \
--cc=adilger@sun.com \
--cc=linux-ext4@vger.kernel.org \
--cc=sandeen@redhat.com \
--cc=tytso@mit.edu \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).