From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:53085) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TqQzR-0007gK-Vw for qemu-devel@nongnu.org; Wed, 02 Jan 2013 11:16:28 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TqQzK-0005vM-DY for qemu-devel@nongnu.org; Wed, 02 Jan 2013 11:16:25 -0500 Received: from nodalink.pck.nerim.net ([62.212.105.220]:56145 helo=paradis.irqsave.net) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TqQzJ-0005vF-Vi for qemu-devel@nongnu.org; Wed, 02 Jan 2013 11:16:18 -0500 From: =?UTF-8?q?Beno=C3=AEt=20Canet?= Date: Wed, 2 Jan 2013 17:16:03 +0100 Message-Id: <1357143393-29832-1-git-send-email-benoit@irqsave.net> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Subject: [Qemu-devel] [RFC V4 00/30] QCOW2 deduplication List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: kwolf@redhat.com, pbonzini@redhat.com, =?UTF-8?q?Beno=C3=AEt=20Canet?= , stefanha@redhat.com This patchset is a cleanup of the previous QCOW2 deduplication rfc. One can compile and install https://github.com/wernerd/Skein3Fish and use= the --enable-skein-dedup configure option in order to use the faster skein HA= SH. Images must be created with "-o dedup=3D[skein|sha256]" in order to activ= ate the deduplication in the image. Deduplication is now fast enough to be usable. v4: Fix and complete qcow2 spec [Stefan] Hash the hash_algo field in the header extension [Stefan] Fix qcow2 spec [Eric] Remove pointer to hash and simplify hash memory management [Stefan] Rename and move qcow2_read_cluster_data to qcow2.c [Stefan] Document lock dropping behaviour of the previous function [Stefan] cleanup qcow2_dedup_read_missing_cluster_data [Stefan] rename *_offset to *_sect [Stefan] add a ./configure check for ssl [Stefan] Replace openssl by gnutls [Stefan] Implement Skein hashes Rewrite pretty every qcow2-dedup.c commits after Add qcow2_dedup_read_missing_and_concatenate to simplify the code Use 64KB deduplication hash block to reduce allocation flushes Use 64KB l2 tables to reduce allocation flushes [breaks compatibility= ] Use lazy refcounts to avoid qcow2_cache_set_dependency loops resultin= gs in frequent caches flushes Do not create and load dedup RAM structures when bdrs->read_only is t= rue v3: make it work barely replace kernel red black trees by gtree. *** BLURB HERE *** Beno=C3=AEt Canet (30): qcow2: Add deduplication to the qcow2 specification. qcow2: Add deduplication structures and fields. qcow2: Add qcow2_dedup_read_missing_and_concatenate qcow2: Make update_refcount public. qcow2: Create a way to link to l2 tables when deduplicating. qcow2: Add qcow2_dedup and related functions qcow2: Add qcow2_dedup_store_new_hashes. qcow2: Implement qcow2_compute_cluster_hash. qcow2: Extract qcow2_dedup_grow_table qcow2: Add qcow2_dedup_grow_table and use it. qcow2: create function to load deduplication hashes at startup. qcow2: Load and save deduplication table header extension. qcow2: Extract qcow2_do_table_init. qcow2-cache: Allow to choose table size at creation. qcow2: Add qcow2_dedup_init and qcow2_dedup_close. qcow2: Extract qcow2_add_feature and qcow2_remove_feature. block: Add qemu-img dedup create option. qcow2: Behave correctly when refcount reach 0 or 2^16. qcow2: Integrate deduplication in qcow2_co_writev loop. qcow2: Serialize write requests when deduplication is activated. qcow2: Add verification of dedup table. qcow2: Adapt checking of QCOW_OFLAG_COPIED for dedup. qcow2: Add check_dedup_l2 in order to check l2 of dedup table. qcow2: Do not overwrite existing entries with QCOW_OFLAG_COPIED. qcow2: Integrate SKEIN hash algorithm in deduplication. qcow2: Add lazy refcounts to deduplication to prevent qcow2_cache_set_dependency loops qcow2: Use large L2 table for deduplication. qcow: Set dedup cluster block size to 64KB. qcow2: init and cleanup deduplication. qemu-iotests: Filter dedup=3Don/off so existing tests don't break. block/Makefile.objs | 1 + block/qcow2-cache.c | 12 +- block/qcow2-cluster.c | 116 +++-- block/qcow2-dedup.c | 1157 ++++++++++++++++++++++++++++++++++++= ++++++ block/qcow2-refcount.c | 157 ++++-- block/qcow2.c | 357 +++++++++++-- block/qcow2.h | 120 ++++- configure | 55 ++ docs/specs/qcow2.txt | 100 +++- include/block/block_int.h | 1 + tests/qemu-iotests/common.rc | 3 +- 11 files changed, 1955 insertions(+), 124 deletions(-) create mode 100644 block/qcow2-dedup.c --=20 1.7.10.4