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Re: [Qemu-devel] [PATCH v4 04/21] block: keep bs->total_sectors up to da
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From: |
Eric Blake |
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Subject: |
Re: [Qemu-devel] [PATCH v4 04/21] block: keep bs->total_sectors up to date even for growable block devices |
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Date: |
Thu, 29 Aug 2013 13:51:12 -0600 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130805 Thunderbird/17.0.8 |
On 08/29/2013 08:00 AM, Paolo Bonzini wrote:
> If a BlockDriverState is growable, after every write we need to
> check if bs->total_sectors might have changed. With this change,
> bdrv_getlength does not need anymore a system call.
>
> Signed-off-by: Paolo Bonzini <address@hidden>
> ---
> v4: use cache in bdrv_getlength
> block.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
Reviewed-by: Eric Blake <address@hidden>
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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- [Qemu-devel] [PATCH v4 00/21] Add qemu-img subcommand to dump file metadata, Paolo Bonzini, 2013/08/29
- [Qemu-devel] [PATCH v4 01/21] cow: make reads go at a decent speed, Paolo Bonzini, 2013/08/29
- [Qemu-devel] [PATCH v4 02/21] cow: make writes go at a less indecent speed, Paolo Bonzini, 2013/08/29
- [Qemu-devel] [PATCH v4 03/21] cow: do not call bdrv_co_is_allocated, Paolo Bonzini, 2013/08/29
- [Qemu-devel] [PATCH v4 04/21] block: keep bs->total_sectors up to date even for growable block devices, Paolo Bonzini, 2013/08/29
- Re: [Qemu-devel] [PATCH v4 04/21] block: keep bs->total_sectors up to date even for growable block devices,
Eric Blake <=
- [Qemu-devel] [PATCH v4 05/21] block: make bdrv_co_is_allocated static, Paolo Bonzini, 2013/08/29
- [Qemu-devel] [PATCH v4 08/21] block: expect errors from bdrv_co_is_allocated, Paolo Bonzini, 2013/08/29
- [Qemu-devel] [PATCH v4 06/21] block: do not use ->total_sectors in bdrv_co_is_allocated, Paolo Bonzini, 2013/08/29
- [Qemu-devel] [PATCH v4 07/21] block: remove bdrv_is_allocated_above/bdrv_co_is_allocated_above distinction, Paolo Bonzini, 2013/08/29
- [Qemu-devel] [PATCH v4 09/21] qemu-img: always probe the input image for allocated sectors, Paolo Bonzini, 2013/08/29
- [Qemu-devel] [PATCH v4 10/21] block: make bdrv_has_zero_init return false for copy-on-write-images, Paolo Bonzini, 2013/08/29