From: Eric Blake <eblake@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: kwolf@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com
Subject: Re: [Qemu-devel] [PATCH v4 04/21] block: keep bs->total_sectors up to date even for growable block devices
Date: Thu, 29 Aug 2013 13:51:12 -0600 [thread overview]
Message-ID: <521FA630.2030005@redhat.com> (raw)
In-Reply-To: <1377784821-29561-5-git-send-email-pbonzini@redhat.com>
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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 <pbonzini@redhat.com>
> ---
> v4: use cache in bdrv_getlength
> block.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
Reviewed-by: Eric Blake <eblake@redhat.com>
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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next prev parent reply other threads:[~2013-08-29 19:51 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-29 14:00 [Qemu-devel] [PATCH v4 00/21] Add qemu-img subcommand to dump file metadata Paolo Bonzini
2013-08-29 14:00 ` [Qemu-devel] [PATCH v4 01/21] cow: make reads go at a decent speed Paolo Bonzini
2013-08-29 14:00 ` [Qemu-devel] [PATCH v4 02/21] cow: make writes go at a less indecent speed Paolo Bonzini
2013-08-29 14:00 ` [Qemu-devel] [PATCH v4 03/21] cow: do not call bdrv_co_is_allocated Paolo Bonzini
2013-08-29 14:00 ` [Qemu-devel] [PATCH v4 04/21] block: keep bs->total_sectors up to date even for growable block devices Paolo Bonzini
2013-08-29 19:51 ` Eric Blake [this message]
2013-08-29 14:00 ` [Qemu-devel] [PATCH v4 05/21] block: make bdrv_co_is_allocated static Paolo Bonzini
2013-08-29 19:53 ` Eric Blake
2013-08-29 14:00 ` [Qemu-devel] [PATCH v4 06/21] block: do not use ->total_sectors in bdrv_co_is_allocated Paolo Bonzini
2013-08-29 19:58 ` Eric Blake
2013-08-29 14:00 ` [Qemu-devel] [PATCH v4 07/21] block: remove bdrv_is_allocated_above/bdrv_co_is_allocated_above distinction Paolo Bonzini
2013-08-29 14:00 ` [Qemu-devel] [PATCH v4 08/21] block: expect errors from bdrv_co_is_allocated Paolo Bonzini
2013-08-29 21:35 ` Eric Blake
2013-08-30 7:18 ` Paolo Bonzini
2013-08-29 14:00 ` [Qemu-devel] [PATCH v4 09/21] qemu-img: always probe the input image for allocated sectors Paolo Bonzini
2013-08-29 14:00 ` [Qemu-devel] [PATCH v4 10/21] block: make bdrv_has_zero_init return false for copy-on-write-images Paolo Bonzini
2013-08-29 14:00 ` [Qemu-devel] [PATCH v4 11/21] block: introduce bdrv_get_block_status API Paolo Bonzini
2013-08-29 14:00 ` [Qemu-devel] [PATCH v4 12/21] block: define get_block_status return value Paolo Bonzini
2013-08-29 14:00 ` [Qemu-devel] [PATCH v4 13/21] block: return get_block_status data and flags for formats Paolo Bonzini
2013-08-29 14:00 ` [Qemu-devel] [PATCH v4 14/21] block: use bdrv_has_zero_init to return BDRV_BLOCK_ZERO Paolo Bonzini
2013-08-29 14:00 ` [Qemu-devel] [PATCH v4 15/21] block: return BDRV_BLOCK_ZERO past end of backing file Paolo Bonzini
2013-08-29 21:59 ` Eric Blake
2013-08-29 14:00 ` [Qemu-devel] [PATCH v4 16/21] qemu-img: add a "map" subcommand Paolo Bonzini
2013-08-29 22:49 ` Eric Blake
2013-08-29 14:00 ` [Qemu-devel] [PATCH v4 17/21] docs, qapi: document qemu-img map Paolo Bonzini
2013-08-29 15:31 ` Eric Blake
2013-08-29 14:00 ` [Qemu-devel] [PATCH v4 18/21] raw-posix: return get_block_status data and flags Paolo Bonzini
2013-08-29 14:00 ` [Qemu-devel] [PATCH v4 19/21] raw-posix: report unwritten extents as zero Paolo Bonzini
2013-08-29 14:00 ` [Qemu-devel] [PATCH v4 20/21] block: add default get_block_status implementation for protocols Paolo Bonzini
2013-08-29 14:00 ` [Qemu-devel] [PATCH v4 21/21] block: look for zero blocks in bs->file Paolo Bonzini
2013-09-04 15:50 ` [Qemu-devel] [PATCH v4 00/21] Add qemu-img subcommand to dump file metadata Stefan Hajnoczi
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