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Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD |
Date: |
Sun, 17 Mar 2013 19:28:32 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130219 Thunderbird/17.0.3 |
Il 15/03/2013 16:35, Peter Maydell ha scritto:
> On 5 March 2013 00:44, Aurelien Jarno <address@hidden> wrote:
>> On Tue, Mar 05, 2013 at 08:22:57AM +0800, Peter Maydell wrote:
>>> What effect does this actually have on the user experience?
>>
>> The effect is that the user don't has to specify the interface type.
>> Basically:
>>
>> -drive file=/path/to/file,if=sd
>> can be replaced by
>> -drive file=/path/to/file
>>
>> It means the user doesn't have to know the details of the machine to
>> know how to attach a disk. Note that the user here can also be a script,
>> which then becomes a bit simpler.
>
> I'm not convinced this is a good thing -- I think you should have
> to know that you're attaching an SD card and not a hard disk,
> because the performance is much worse. In particular if you
> don't specify 'cache=writeback' your performance will be
> dreadful, so you need to do something different from hard
> disks anyhow.
cache=writeback has been the default for a few releases.
Paolo
- Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD, (continued)
- Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD, Aurelien Jarno, 2013/03/15
- Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD, Peter Maydell, 2013/03/15
- Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD, Aurelien Jarno, 2013/03/16
- Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD, Peter Maydell, 2013/03/16
- Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD, Aurelien Jarno, 2013/03/17
- Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD, Peter Maydell, 2013/03/17
- Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD, Paolo Bonzini, 2013/03/17
- Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD, Peter Maydell, 2013/03/17
- Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD, Aurelien Jarno, 2013/03/17
- Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD, Aurelien Jarno, 2013/03/17
- Re: [Qemu-devel] [PATCH] hw/vexpress: set default block type to SD,
Paolo Bonzini <=