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Re: [Qemu-devel] [RFC] Disk integrity in QEMU
From: |
Paul Brook |
Subject: |
Re: [Qemu-devel] [RFC] Disk integrity in QEMU |
Date: |
Fri, 10 Oct 2008 13:53:31 +0100 |
User-agent: |
KMail/1.9.9 |
> But that said, I'm concerned that this is far too confusing for users.
> I don't think anyone is relying on disk write performance when in
> write-back mode simply because the guest already has a page cache so
> writes are already being completed instantaneously from the
> application's perspective.
This isn't entirely true. With IDE devices you don't have command queueing, so
it's easy for a large write to stall subsequent reads for a relatively long
time.
I'm not sure how much this effects qemu, but I've definitely seen it happening
on real hardware.
Paul
- [Qemu-devel] [RFC] Disk integrity in QEMU, Anthony Liguori, 2008/10/09
- Re: [Qemu-devel] [RFC] Disk integrity in QEMU, Aurelien Jarno, 2008/10/10
- Re: [Qemu-devel] [RFC] Disk integrity in QEMU, Anthony Liguori, 2008/10/10
- Re: [Qemu-devel] [RFC] Disk integrity in QEMU,
Paul Brook <=
- Re: [Qemu-devel] [RFC] Disk integrity in QEMU, Anthony Liguori, 2008/10/10
- Re: [Qemu-devel] [RFC] Disk integrity in QEMU, Paul Brook, 2008/10/10
- Re: [Qemu-devel] [RFC] Disk integrity in QEMU, Avi Kivity, 2008/10/10
- Re: [Qemu-devel] [RFC] Disk integrity in QEMU, Jens Axboe, 2008/10/17
- Re: [Qemu-devel] [RFC] Disk integrity in QEMU, Avi Kivity, 2008/10/19
- Re: [Qemu-devel] [RFC] Disk integrity in QEMU, Aurelien Jarno, 2008/10/10
Re: [Qemu-devel] [RFC] Disk integrity in QEMU, Avi Kivity, 2008/10/10