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


From: Paolo Bonzini
Subject: Re: [Qemu-devel] [PATCH] sheepdog: implement direct write semantics
Date: Fri, 11 Jan 2013 04:00:09 -0500 (EST)

> bdrv_enable_write_cache() is always
> true for now, I guess this need generic change block layer to get the
> writethrough/writeback hints.

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.

Paolo



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