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Re: [Qemu-devel] [PATCH] sheepdog: implement direct write semantics

From: Liu Yuan
Subject: Re: [Qemu-devel] [PATCH] sheepdog: implement direct write semantics
Date: Fri, 11 Jan 2013 17:04:23 +0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/17.0 Thunderbird/17.0 
On 01/11/2013 05:00 PM, Paolo Bonzini wrote:
> That's not correct.  Try hdparm with an IDE disk, or sysfs with a SCSI
> disk (recent kernels will also support sysfs with an IDE or virtio-blk
> disk) and you'll see that it changes.

Okay, at least at startup, even with cache=writehtough set, I saw
bdrv_enable_write_cache() returns true from sd_open(). So you mean this
will be reset later (after sd_open())?

Thanks,
Yuan
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