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 <d...@openvz.org> CC: Roman Kagan <rka...@parallels.com> CC: Kevin Wolf <kw...@redhat.com> CC: Stefan Hajnoczi <stefa...@redhat.com>
