From: Chris Wedgwood <cw@f00f.org>
To: Paolo Bonzini <pbonzini@redhat.com>, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [RFC PATCH 14/17] block: support FALLOC_FL_PUNCH_HOLE trimming
Date: Fri, 9 Mar 2012 00:20:41 -0800 [thread overview]
Message-ID: <20120309082041.GA28158@puku.stupidest.org> (raw)
In-Reply-To: <1331226917-6658-15-git-send-email-pbonzini@redhat.com>
> This will enable discard on more filesystems, including ext4.
i think this should default to off
for preallocated files this will punch holes all over the place and
reallocation will cause fragmentation (guests will free and reallocat
blocks normally)
xfs has a mechanism to convert to unwritten extents that would avoid
that, but it's not implemented in other filesystems
next prev parent reply other threads:[~2012-03-09 8:20 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-08 17:15 [Qemu-devel] [RFC PATCH 00/17] Improvements around discard and write zeroes Paolo Bonzini
2012-03-08 17:15 ` [Qemu-devel] [RFC PATCH 01/17] qemu-iotests: add a simple test for write_zeroes Paolo Bonzini
2012-03-08 17:15 ` [Qemu-devel] [RFC PATCH 02/17] qed: make write-zeroes bounce buffer smaller than a single cluster Paolo Bonzini
2012-03-08 17:15 ` [Qemu-devel] [RFC PATCH 03/17] block: add discard properties to BlockDriverInfo Paolo Bonzini
2012-03-09 16:47 ` Kevin Wolf
2012-03-08 17:15 ` [Qemu-devel] [RFC PATCH 04/17] qed: implement bdrv_aio_discard Paolo Bonzini
2012-03-09 16:31 ` Kevin Wolf
2012-03-09 17:53 ` Paolo Bonzini
2012-03-08 17:15 ` [Qemu-devel] [RFC PATCH 05/17] block: pass around qiov for write_zeroes operation Paolo Bonzini
2012-03-08 17:15 ` [Qemu-devel] [RFC PATCH 06/17] block: use bdrv_{co, aio}_discard for write_zeroes operations Paolo Bonzini
2012-03-09 16:37 ` Kevin Wolf
2012-03-09 18:06 ` Paolo Bonzini
2012-03-10 18:02 ` Richard Laager
2012-03-12 12:27 ` Paolo Bonzini
2012-03-12 13:04 ` Kevin Wolf
2012-03-13 19:13 ` Richard Laager
2012-03-14 7:41 ` Paolo Bonzini
2012-03-14 12:01 ` Kevin Wolf
2012-03-14 12:14 ` Paolo Bonzini
2012-03-14 12:37 ` Kevin Wolf
2012-03-14 12:49 ` Paolo Bonzini
2012-03-14 13:04 ` Kevin Wolf
2012-03-24 15:33 ` Christoph Hellwig
2012-03-24 15:30 ` Christoph Hellwig
2012-03-26 19:40 ` Richard Laager
2012-03-27 10:20 ` Kevin Wolf
2012-03-24 15:29 ` Christoph Hellwig
2012-03-26 9:44 ` Daniel P. Berrange
2012-03-26 9:56 ` Christoph Hellwig
2012-03-15 0:42 ` Richard Laager
2012-03-15 9:36 ` Paolo Bonzini
2012-03-16 0:47 ` Richard Laager
2012-03-16 9:34 ` Paolo Bonzini
2012-03-24 15:27 ` Christoph Hellwig
2012-03-26 19:40 ` Richard Laager
2012-03-27 9:08 ` Christoph Hellwig
2012-03-08 17:15 ` [Qemu-devel] [RFC PATCH 07/17] block: make high level discard operation always zero Paolo Bonzini
2012-03-08 17:55 ` Avi Kivity
2012-03-09 16:42 ` Kevin Wolf
2012-03-12 10:42 ` Avi Kivity
2012-03-12 11:04 ` Kevin Wolf
2012-03-12 12:03 ` Avi Kivity
2012-03-08 17:15 ` [Qemu-devel] [RFC PATCH 08/17] block: kill the write zeroes operation Paolo Bonzini
2012-03-08 17:15 ` [Qemu-devel] [RFC PATCH 09/17] ide: issue discard asynchronously but serialize the pieces Paolo Bonzini
2012-03-08 17:15 ` [Qemu-devel] [RFC PATCH 10/17] ide/scsi: add discard_zeroes_data property Paolo Bonzini
2012-03-08 18:13 ` Avi Kivity
2012-03-08 18:14 ` Avi Kivity
2012-03-08 17:15 ` [Qemu-devel] [RFC PATCH 11/17] ide/scsi: prepare for flipping the discard defaults Paolo Bonzini
2012-03-08 17:15 ` [Qemu-devel] [RFC PATCH 12/17] ide/scsi: turn on discard Paolo Bonzini
2012-03-08 18:17 ` Avi Kivity
2012-03-08 17:15 ` [Qemu-devel] [RFC PATCH 13/17] block: fallback from discard to writes Paolo Bonzini
2012-03-24 15:35 ` Christoph Hellwig
2012-03-08 17:15 ` [Qemu-devel] [RFC PATCH 14/17] block: support FALLOC_FL_PUNCH_HOLE trimming Paolo Bonzini
2012-03-09 8:20 ` Chris Wedgwood [this message]
2012-03-09 8:31 ` Paolo Bonzini
2012-03-09 8:35 ` Chris Wedgwood
2012-03-09 8:40 ` Paolo Bonzini
2012-03-09 10:31 ` Stefan Hajnoczi
2012-03-09 10:43 ` Paolo Bonzini
2012-03-09 10:53 ` Stefan Hajnoczi
2012-03-09 10:57 ` Paolo Bonzini
2012-03-09 20:36 ` Richard Laager
2012-03-12 9:34 ` Paolo Bonzini
2012-03-24 15:40 ` Christoph Hellwig
2012-03-08 17:15 ` [Qemu-devel] [RFC PATCH 15/17] raw: add get_info Paolo Bonzini
2012-03-08 17:15 ` [Qemu-devel] [RFC PATCH 16/17] qemu-io: fix the alloc command Paolo Bonzini
2012-03-08 17:15 ` [Qemu-devel] [RFC PATCH 17/17] raw: implement is_allocated Paolo Bonzini
2012-03-24 15:42 ` Christoph Hellwig
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