From: Christoph Hellwig <hch@infradead.org>
To: Mark Lord <kernel@teksavvy.com>
Cc: Christoph Hellwig <hch@infradead.org>,
Chris Mason <chris.mason@oracle.com>,
James Bottomley <james.bottomley@suse.de>,
Matthew Wilcox <matthew@wil.cx>, Josef Bacik <josef@redhat.com>,
Lukas Czerner <lczerner@redhat.com>, tytso <tytso@mit.edu>,
linux-ext4 <linux-ext4@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
sandeen <sandeen@redhat.com>
Subject: Re: [PATCH 1/2] fs: Do not dispatch FITRIM through separate super_operation
Date: Tue, 7 Dec 2010 04:27:49 -0500 [thread overview]
Message-ID: <20101207092749.GA26100@infradead.org> (raw)
In-Reply-To: <4CE695FF.20601@teksavvy.com>
On Fri, Nov 19, 2010 at 10:21:35AM -0500, Mark Lord wrote:
> >I really hate to rely on this third party hearsay (from all sides), and
> >have implement TRIM support in qemu now. I'll soon install win7 and
> >will check out the TRIM patters myself.
>
> Excellent!
I did a Windows 7 installation under qemu today, and the result is:
- it TRIMs the whole device early during the installation
- after that I see a constant stream of small trims during the
installation. It's using lots of non-contiguous ranges in a single
TRIM command, with sizes down to 8 sectors (4k) for a single range.
- after installation there's is some background-trimming going on
even when doing no user interaction with the VM at all.
- removing files leads to an instant stream of TRIMs, again vectored
and of all sizes down to 4k. Note that the TRIMs are a lot more
instant than even with btrfs and -o discard, which delays most
TRIMs until doing a sync.
next prev parent reply other threads:[~2010-12-07 9:28 UTC|newest]
Thread overview: 106+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-18 7:36 [PATCH 1/2] fs: Do not dispatch FITRIM through separate super_operation Lukas Czerner
2010-11-18 7:36 ` [PATCH 2/2] ext4: Add EXT4_IOC_TRIM ioctl to handle batched discard Lukas Czerner
2010-11-19 16:19 ` Ted Ts'o
2010-11-19 16:26 ` Lukas Czerner
2010-11-20 1:37 ` Ted Ts'o
2010-11-18 13:06 ` [PATCH 1/2] fs: Do not dispatch FITRIM through separate super_operation Matthew Wilcox
2010-11-18 13:48 ` Josef Bacik
2010-11-18 14:19 ` Matthew Wilcox
2010-11-18 14:29 ` Christoph Hellwig
2010-11-18 17:19 ` James Bottomley
2010-11-18 17:22 ` Jeff Moyer
2010-11-18 17:41 ` James Bottomley
2010-11-18 20:04 ` Greg Freemyer
2010-11-18 20:04 ` Greg Freemyer
2010-11-18 21:42 ` Mark Lord
2010-11-18 21:44 ` Mark Lord
2010-11-18 21:50 ` James Bottomley
2010-11-18 22:07 ` Mark Lord
2010-11-19 1:33 ` Ted Ts'o
2010-11-19 3:44 ` Mark Lord
2010-11-19 3:44 ` Mark Lord
2010-11-19 3:44 ` Mark Lord
2010-11-19 13:58 ` Jeff Moyer
2010-11-18 23:52 ` Martin K. Petersen
2010-11-19 0:34 ` Mark Lord
2010-11-19 1:16 ` Greg Freemyer
2010-11-19 1:16 ` Greg Freemyer
2010-11-19 11:55 ` Christoph Hellwig
2010-11-19 14:01 ` Mark Lord
2010-11-19 14:06 ` Christoph Hellwig
2010-11-19 14:48 ` Mark Lord
2010-11-19 14:54 ` Christoph Hellwig
2010-11-19 15:24 ` Mark Lord
2010-11-19 15:34 ` Christoph Hellwig
2010-11-19 16:20 ` Greg Freemyer
2010-11-19 16:38 ` Christoph Hellwig
2010-11-19 18:06 ` Lukas Czerner
2010-11-19 18:10 ` Lukas Czerner
2010-11-19 18:14 ` Lukas Czerner
2010-11-19 19:29 ` Chris Mason
2010-11-19 1:49 ` Martin K. Petersen
2010-11-19 3:42 ` Mark Lord
2010-11-18 18:05 ` Jamie Lokier
2010-11-18 19:32 ` Markus Trippelsdorf
2010-11-18 21:45 ` Mark Lord
2010-11-18 21:50 ` Markus Trippelsdorf
2010-11-18 22:09 ` Mark Lord
2010-11-18 17:35 ` Lukas Czerner
2010-11-19 12:16 ` Steven Whitehouse
2010-11-19 13:53 ` Mark Lord
2010-11-19 14:02 ` Ted Ts'o
2010-11-19 14:10 ` Christoph Hellwig
2010-11-19 14:10 ` Christoph Hellwig
2010-11-19 14:10 ` Christoph Hellwig
2010-11-19 15:37 ` Ted Ts'o
2010-11-19 15:50 ` Christoph Hellwig
2010-11-19 15:50 ` Christoph Hellwig
2010-11-19 15:50 ` Christoph Hellwig
2010-11-19 16:16 ` Ted Ts'o
2010-11-19 14:50 ` Mark Lord
2010-11-19 14:50 ` Mark Lord
2010-11-19 14:50 ` Mark Lord
2010-11-19 15:35 ` Mark Lord
2010-11-19 15:35 ` Mark Lord
2010-11-19 15:35 ` Mark Lord
2010-11-19 15:44 ` Lukas Czerner
2010-11-19 16:30 ` Ted Ts'o
2010-11-19 22:49 ` Mark Lord
2010-11-19 22:49 ` Mark Lord
2010-11-19 22:49 ` Mark Lord
2010-11-25 2:48 ` Mark Lord
2010-11-25 2:48 ` Mark Lord
2010-11-25 2:48 ` Mark Lord
2010-11-25 4:23 ` Martin K. Petersen
2010-11-25 14:44 ` Mark Lord
2010-11-25 4:41 ` Greg Freemyer
2010-11-25 4:41 ` Greg Freemyer
2010-11-25 14:53 ` Mark Lord
2010-11-25 16:24 ` Greg Freemyer
2010-11-25 16:24 ` Greg Freemyer
2010-11-26 13:49 ` Mark Lord
2010-11-26 14:00 ` Lukas Czerner
2010-11-18 17:55 ` Chris Mason
2010-12-03 18:24 ` Ric Wheeler
2010-11-18 21:37 ` Mark Lord
2010-11-19 11:09 ` Christoph Hellwig
2010-11-19 13:54 ` Mark Lord
2010-11-19 14:40 ` Chris Mason
2010-11-19 14:53 ` Mark Lord
2010-11-19 14:57 ` Christoph Hellwig
2010-11-19 15:21 ` Mark Lord
2010-12-07 9:27 ` Christoph Hellwig [this message]
2010-12-07 16:52 ` Chris Mason
2011-06-02 4:52 ` Kyungmin Park
2011-06-02 8:14 ` Lukas Czerner
2011-06-03 2:06 ` Dave Chinner
2011-06-03 2:06 ` Dave Chinner
2011-06-03 4:25 ` Kyungmin Park
2011-06-03 4:25 ` Kyungmin Park
2010-11-19 15:30 ` Mark Lord
2010-11-21 19:07 ` Valdis.Kletnieks
2010-11-21 20:20 ` James Bottomley
2010-11-18 14:31 ` Josef Bacik
2010-11-18 14:36 ` Tao Ma
2010-11-19 15:41 ` Ted Ts'o
2010-11-19 15:50 ` Christoph Hellwig
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