On Tue, Apr 28, 2015 at 10:46:33AM +0300, Denis V. Lunev wrote: > 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>
Thanks, applied to my master tree: https://github.com/stefanha/qemu/commits/master Stefan
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