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[Qemu-devel] [PATCH v4 0/27] write/create for Parallels images with reas
From: |
Denis V. Lunev |
Subject: |
[Qemu-devel] [PATCH v4 0/27] write/create for Parallels images with reasonable performance |
Date: |
Tue, 28 Apr 2015 10:46:33 +0300 |
This patchset provides an ability to create of/write to Parallels
images and some testing of the new code. Readings and writings are
optimized out and I expect the same or slightly better performance
as qcow2.
Changes from v4:
- parallels format driver marked as bdrv_has_zero_init_1
- added missed unlocks to parallels_co_readv/writev on error path, locking
is shortened and simplified
- changed test number for created images
- added check for bdrv_has_zero_init() and availability of bdrv_truncate()
in parallels_open() and proper error handling in alloc_cluster
- some patch comments are improved
Changes from v3:
- fixed checkpatch warnings even in just moved code. I am tired of them
- fixed contingency check in patch 18
Changes from v2:
- read performance is almost doubled (up to 360 Mb/sec), write performance
is improved by 15-20%
- bat caching approach changed completely. bat_bitmap now contains the data
in on-disk format, which allows to use this data for metadata cache
- incorrect close detection code is added (inuse field in the header)
- very basic check consistency code added
Changes from v1:
- patches 13-19 added, which boosts performance from 800 KiB/sec to
near native performance
Signed-off-by: Denis V. Lunev <address@hidden>
CC: Roman Kagan <address@hidden>
CC: Kevin Wolf <address@hidden>
CC: Stefan Hajnoczi <address@hidden>
- [Qemu-devel] [PATCH v4 0/27] write/create for Parallels images with reasonable performance,
Denis V. Lunev <=
- [Qemu-devel] [PATCH 05/27] block/parallels: add get_block_status, Denis V. Lunev, 2015/04/28
- [Qemu-devel] [PATCH 03/27] block/parallels: switch to bdrv_read, Denis V. Lunev, 2015/04/28
- [Qemu-devel] [PATCH 02/27] block/parallels: rename parallels_header to ParallelsHeader, Denis V. Lunev, 2015/04/28
- [Qemu-devel] [PATCH 06/27] block/parallels: provide _co_readv routine for parallels format driver, Denis V. Lunev, 2015/04/28
- [Qemu-devel] [PATCH 07/27] block/parallels: replace magic constants 4, 64 with proper sizeofs, Denis V. Lunev, 2015/04/28
- [Qemu-devel] [PATCH 08/27] block/parallels: mark parallels format driver as zero inited, Denis V. Lunev, 2015/04/28
- [Qemu-devel] [PATCH 01/27] iotests, parallels: quote TEST_IMG in 076 test to be path-safe, Denis V. Lunev, 2015/04/28
- [Qemu-devel] [PATCH 09/27] block/parallels: _co_writev callback for Parallels format, Denis V. Lunev, 2015/04/28