From: Kevin Wolf <kwolf@redhat.com>
To: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Cc: qemu-devel@nongnu.org, qemu-block@nongnu.org, famz@redhat.com,
stefanha@redhat.com, jcody@redhat.com, mreitz@redhat.com,
den@openvz.org, eblake@redhat.com
Subject: Re: [Qemu-devel] [PATCH v4 03/11] block: allow serialized reads to intersect
Date: Tue, 6 Nov 2018 18:57:20 +0100 [thread overview]
Message-ID: <20181106175720.GI4758@linux.fritz.box> (raw)
In-Reply-To: <20181015160633.63130-4-vsementsov@virtuozzo.com>
Am 15.10.2018 um 18:06 hat Vladimir Sementsov-Ogievskiy geschrieben:
> Otherwise, if we have serialized read-part in copy_range from backing
> file to its parent if CoW take place, this CoW's sub-reads will
> intersect with firstly created serialized read request.
>
> Anyway, reads should not influence on disk view, let's allow them to
> intersect.
>
> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
What about reads that internally trigger writes, such as copy-on-read?
Kevin
next prev parent reply other threads:[~2018-11-06 18:10 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-15 16:06 [Qemu-devel] [PATCH v4 00/11] backup-top filter driver for backup Vladimir Sementsov-Ogievskiy
2018-10-15 16:06 ` [Qemu-devel] [PATCH v4 01/11] block/backup: simplify backup_incremental_init_copy_bitmap Vladimir Sementsov-Ogievskiy
2018-10-15 16:06 ` [Qemu-devel] [PATCH v4 02/11] block/backup: move to copy_bitmap with granularity Vladimir Sementsov-Ogievskiy
2018-10-15 16:06 ` [Qemu-devel] [PATCH v4 03/11] block: allow serialized reads to intersect Vladimir Sementsov-Ogievskiy
2018-11-06 17:57 ` Kevin Wolf [this message]
2018-11-07 10:08 ` Vladimir Sementsov-Ogievskiy
2018-10-15 16:06 ` [Qemu-devel] [PATCH v4 04/11] block: improve should_update_child Vladimir Sementsov-Ogievskiy
2018-11-06 18:09 ` Kevin Wolf
2018-10-15 16:06 ` [Qemu-devel] [PATCH v4 05/11] iotests: handle -f argument correctly for qemu_io_silent Vladimir Sementsov-Ogievskiy
2018-10-15 16:06 ` [Qemu-devel] [PATCH v4 06/11] iotests: allow resume_drive by node name Vladimir Sementsov-Ogievskiy
2018-10-15 16:06 ` [Qemu-devel] [PATCH v4 07/11] iotests: prepare 055 to graph changes during backup job Vladimir Sementsov-Ogievskiy
2018-10-15 16:06 ` [Qemu-devel] [PATCH v4 08/11] block: introduce backup-top filter driver Vladimir Sementsov-Ogievskiy
2018-10-15 16:06 ` [Qemu-devel] [PATCH v4 09/11] block: add lock/unlock range functions Vladimir Sementsov-Ogievskiy
2018-10-15 16:06 ` [Qemu-devel] [PATCH v4 10/11] block/backup: tiny refactor backup_job_create Vladimir Sementsov-Ogievskiy
2018-10-15 16:06 ` [Qemu-devel] [PATCH v4 11/11] block/backup: use backup-top instead of write notifiers Vladimir Sementsov-Ogievskiy
2018-11-06 17:35 ` Kevin Wolf
2018-11-02 16:41 ` [Qemu-devel] ping Re: [PATCH v4 00/11] backup-top filter driver for backup Vladimir Sementsov-Ogievskiy
2018-11-06 17:21 ` Kevin Wolf
2018-11-06 22:35 ` [Qemu-devel] [Qemu-block] " John Snow
2018-11-07 10:16 ` Vladimir Sementsov-Ogievskiy
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