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Re: [Qemu-devel] [PATCH v2 00/17] Add qemu-img subcommand to dump file m
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PATCH v2 00/17] Add qemu-img subcommand to dump file metadata |
Date: |
Thu, 18 Jul 2013 10:58:32 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130625 Thunderbird/17.0.7 |
Il 18/07/2013 10:17, Peter Lieven ha scritto:
>
> maybe i have missed it in your patches, but would it be also possible to issue
> DISCARDZEROES ioctl on linux to return zero status for block devices also?
I think that would belong in your patches. Once we have discard_zeroes,
we can use it as you suggested.
It is a good occasion to ask Linux developers for clarifications about
the meaning of discard_zeroes in the presence of misaligned requests.
But because of legacy, we might need to query the kernel for the
granularity ourselves---which is ugly because it is not available
through a ioctl, only sysfs.
Paolo
- [Qemu-devel] [PATCH v2 15/17] raw-posix: detect XFS unwritten extents, (continued)
- [Qemu-devel] [PATCH v2 15/17] raw-posix: detect XFS unwritten extents, Paolo Bonzini, 2013/07/16
- [Qemu-devel] [PATCH v2 16/17] block: add default get_block_status implementation for protocols, Paolo Bonzini, 2013/07/16
- [Qemu-devel] [PATCH v2 17/17] block: look for zero blocks in bs->file, Paolo Bonzini, 2013/07/16
- [Qemu-devel] [PATCH v2 06/17] block: expect errors from bdrv_co_is_allocated, Paolo Bonzini, 2013/07/16
- [Qemu-devel] [PATCH v2 07/17] qemu-img: always probe the input image for allocated sectors, Paolo Bonzini, 2013/07/16
- [Qemu-devel] [PATCH v2 05/17] block: remove bdrv_is_allocated_above/bdrv_co_is_allocated_above distinction, Paolo Bonzini, 2013/07/16
- Re: [Qemu-devel] [PATCH v2 00/17] Add qemu-img subcommand to dump file metadata, Eric Blake, 2013/07/16
- Re: [Qemu-devel] [PATCH v2 00/17] Add qemu-img subcommand to dump file metadata, Peter Lieven, 2013/07/18
- Re: [Qemu-devel] [PATCH v2 00/17] Add qemu-img subcommand to dump file metadata,
Paolo Bonzini <=
- Re: [Qemu-devel] [PATCH v2 00/17] Add qemu-img subcommand to dump file metadata, Stefan Hajnoczi, 2013/07/19
- Re: [Qemu-devel] [PATCH v2 00/17] Add qemu-img subcommand to dump file metadata, Stefan Hajnoczi, 2013/07/19