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Re: [Qemu-devel] [RFC][PATCH] make sure disk writes actually hit disk
From: |
Jamie Lokier |
Subject: |
Re: [Qemu-devel] [RFC][PATCH] make sure disk writes actually hit disk |
Date: |
Sun, 30 Jul 2006 22:47:12 +0100 |
User-agent: |
Mutt/1.4.1i |
Bill C. Riemers wrote:
> How about compromising, and making the patch a run time option.
> Presumably this is only a problem when the virtual machine is not
> properly shutdown. For those ho want the extra security of knowing
> the data will be written regardless of the shutdown status they can
> enable the flag. By default it could be turned off. Then everybody
> can be happy.
Real disks don't provide that security unless you disable the disk's
cache, or issue cache flush instructions to the disk.
Modern guest OS filesystems are written with this in mind.
With older guest OSes, you have to disable the disk cache if you want
that kind of security with real disks.
Is there any reason why the emulation should be any different?
-- Jamie
Re: [Qemu-devel] [RFC][PATCH] make sure disk writes actually hit disk, Fabrice Bellard, 2006/07/29
Re: [Qemu-devel] [RFC][PATCH] make sure disk writes actually hit disk, Bill C. Riemers, 2006/07/29
Re: [Qemu-devel] [RFC][PATCH] make sure disk writes actually hit disk,
Jamie Lokier <=
Re: [Qemu-devel] [RFC][PATCH] make sure disk writes actually hit disk, Jamie Lokier, 2006/07/30
Re: [Qemu-devel] [RFC][PATCH] make sure disk writes actually hit disk, andrzej zaborowski, 2006/07/31
Re: [Qemu-devel] [RFC][PATCH] make sure disk writes actually hit disk, Jens Axboe, 2006/07/31
Re: [Qemu-devel] [RFC][PATCH] make sure disk writes actually hit disk, andrzej zaborowski, 2006/07/31
Re: [Qemu-devel] [RFC][PATCH] make sure disk writes actually hit disk, Jens Axboe, 2006/07/31
Re: [Qemu-devel] [RFC][PATCH] make sure disk writes actually hit disk, Jonas Maebe, 2006/07/31
Re: [Qemu-devel] [RFC][PATCH] make sure disk writes actually hit disk, Jens Axboe, 2006/07/31