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Re: [Qemu-devel] [RFC v9 06/27] virtio-blk: Take PCI memory range into a
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From: |
Stefan Hajnoczi |
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Subject: |
Re: [Qemu-devel] [RFC v9 06/27] virtio-blk: Take PCI memory range into account |
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Date: |
Thu, 19 Jul 2012 10:14:37 +0100 |
On Wed, Jul 18, 2012 at 7:29 PM, Michael S. Tsirkin <address@hidden> wrote:
> On Wed, Jul 18, 2012 at 04:07:33PM +0100, Stefan Hajnoczi wrote:
>> Support >4 GB physical memory accesses.
>>
>> Signed-off-by: Stefan Hajnoczi <address@hidden>
>
> Need some sane APIs, this is just too scary.
Yes, this prototype has (at least) two layering violations:
1. Bypassing QEMU's memory subsystem because it isn't thread-safe.
2. Bypassing block layer and extracting the underlying fd out of a
raw-posix file, allowing us to do our own Linux AIO.
Stefan
- [Qemu-devel] [RFC v9 15/27] notifier: Add a function to set the notifier, (continued)
- [Qemu-devel] [RFC v9 15/27] notifier: Add a function to set the notifier, Stefan Hajnoczi, 2012/07/18
- [Qemu-devel] [RFC v9 05/27] virtio-blk: Do cheapest possible memory mapping, Stefan Hajnoczi, 2012/07/18
- [Qemu-devel] [RFC v9 07/27] virtio-blk: Put dataplane code into its own directory, Stefan Hajnoczi, 2012/07/18
- [Qemu-devel] [RFC v9 09/27] virtio-blk: Add Linux AIO queue, Stefan Hajnoczi, 2012/07/18
- [Qemu-devel] [RFC v9 10/27] virtio-blk: Stop data plane thread cleanly, Stefan Hajnoczi, 2012/07/18
- [Qemu-devel] [RFC v9 23/27] virtio-blk: Stub out SCSI commands, Stefan Hajnoczi, 2012/07/18
- [Qemu-devel] [RFC v9 13/27] virtio-blk: Increase max requests for indirect vring, Stefan Hajnoczi, 2012/07/18
- [Qemu-devel] [RFC v9 06/27] virtio-blk: Take PCI memory range into account, Stefan Hajnoczi, 2012/07/18
[Qemu-devel] [RFC v9 12/27] virtio-blk: Add workaround for BUG_ON() dependency in virtio_ring.h, Stefan Hajnoczi, 2012/07/18
[Qemu-devel] [RFC v9 11/27] virtio-blk: Indirect vring and flush support, Stefan Hajnoczi, 2012/07/18
[Qemu-devel] [RFC v9 14/27] virtio-blk: Use pthreads instead of qemu-thread, Stefan Hajnoczi, 2012/07/18
[Qemu-devel] [RFC v9 16/27] virtio-blk: Kick data plane thread using event notifier set, Stefan Hajnoczi, 2012/07/18
[Qemu-devel] [RFC v9 08/27] virtio-blk: Read requests from the vring, Stefan Hajnoczi, 2012/07/18