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[Qemu-devel] [PATCH v3 0/27] write/create for Parallels images with reas


From: Denis V. Lunev
Subject: [Qemu-devel] [PATCH v3 0/27] write/create for Parallels images with reasonable performance
Date: Wed, 11 Mar 2015 13:27:54 +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.

This patchset consists of not problematic part of the previous
patchset aka
   [PATCH v4 0/16] parallels format support improvements
and new write/create code but it does not contradict questionable code
with XML handling there.

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: Jeff Cody <address@hidden>
CC: Kevin Wolf <address@hidden>
CC: Stefan Hajnoczi <address@hidden>




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