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From: Dor Laor <dlaor@redhat.com>
To: Anthony Liguori <anthony@codemonkey.ws>
Cc: Kevin Wolf <kwolf@redhat.com>, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH] block-raw: Make cache=off default again
Date: Mon, 22 Jun 2009 16:23:58 +0300	[thread overview]
Message-ID: <4A3F85EE.5030109@redhat.com> (raw)
In-Reply-To: <4A3F8238.8010903@codemonkey.ws>

On 06/22/2009 04:08 PM, Anthony Liguori wrote:
> Kevin Wolf wrote:
>> Since the patch that suggested it woudl revert qcow2 to writeback 
>> caching, in
>> fact none of the drivers has had cache=off as default any more. This 
>> patch
>> restores the desired behaviour.
>
> When has cache=off ever been the default?
>
> Moreover, why would we want to make it the default?  A patch with this 
> drastic of a change really need a more 

It should be the default (or at least O_DSYNC) since plain users are not 
aware that writeback might
cause their image to get corrupted on host crash.

> significant justification in the change log.
>
> Regards,
>
> Anthony Liguori
>
>

  parent reply	other threads:[~2009-06-22 13:23 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-06-22 11:18 [Qemu-devel] [PATCH] block-raw: Make cache=off default again Kevin Wolf
2009-06-22 11:35 ` Christoph Hellwig
2009-06-22 11:44   ` Kevin Wolf
2009-06-22 11:55     ` Avi Kivity
2009-06-22 12:32       ` Kevin Wolf
2009-06-22 12:39         ` Avi Kivity
2009-06-22 12:50           ` Kevin Wolf
2009-06-23 10:30             ` Jamie Lokier
2009-06-23 11:46               ` Kevin Wolf
2009-06-24 21:23                 ` Jamie Lokier
2009-06-25  7:31                   ` Kevin Wolf
2009-06-22 13:04     ` Christoph Hellwig
2009-06-22 13:05       ` Kevin Wolf
2009-06-22 13:14       ` Avi Kivity
2009-06-22 13:08 ` Anthony Liguori
2009-06-22 13:20   ` Kevin Wolf
2009-06-22 14:00     ` Anthony Liguori
2009-06-22 13:23   ` Dor Laor [this message]
2009-06-22 13:29     ` Kevin Wolf

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