From: Alberto Garcia <berto@igalia.com>
To: Eric Blake <eblake@redhat.com>, Max Reitz <mreitz@redhat.com>,
qemu-devel@nongnu.org
Cc: Kevin Wolf <kwolf@redhat.com>, "Denis V . Lunev" <den@openvz.org>,
Anton Nefedov <anton.nefedov@virtuozzo.com>,
Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>,
qemu-block@nongnu.org
Subject: Re: [RFC PATCH v3 05/27] qcow2: Document the Extended L2 Entries feature
Date: Thu, 20 Feb 2020 17:04:43 +0100 [thread overview]
Message-ID: <w51k14hb5yc.fsf@maestria.local.igalia.com> (raw)
In-Reply-To: <fcaace04-17be-66b2-e0aa-6b1c68b11989@redhat.com>
On Thu 20 Feb 2020 05:02:22 PM CET, Eric Blake wrote:
>>> + Bits are assigned starting from the most significant one.
>>> + (i.e. bit x is used for subcluster 31 - x)
>>
>> I still prefer it the other way round, both personally (e.g. it’s the
>> C ordering), and because other places in qcow2 use LSb for bit
>> ordering (the refcount order).
>
> Internal consistency with refcount order using LSb ordering is the
> strongest reason to flip things, and have bit x be subcluster x.
Ok, I think you're both right, I'll change that.
Berto
next prev parent reply other threads:[~2020-02-20 16:06 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-22 11:36 [RFC PATCH v3 00/27] Add subcluster allocation to qcow2 Alberto Garcia
2019-12-22 11:36 ` [RFC PATCH v3 01/27] qcow2: Add calculate_l2_meta() Alberto Garcia
2020-02-20 13:28 ` Max Reitz
2019-12-22 11:36 ` [RFC PATCH v3 02/27] qcow2: Split cluster_needs_cow() out of count_cow_clusters() Alberto Garcia
2020-02-20 13:32 ` Max Reitz
2019-12-22 11:36 ` [RFC PATCH v3 03/27] qcow2: Process QCOW2_CLUSTER_ZERO_ALLOC clusters in handle_copied() Alberto Garcia
2020-02-20 14:53 ` Eric Blake
2020-02-20 15:00 ` Max Reitz
2020-02-20 15:19 ` Max Reitz
2019-12-22 11:36 ` [RFC PATCH v3 04/27] qcow2: Add get_l2_entry() and set_l2_entry() Alberto Garcia
2020-02-20 15:22 ` Eric Blake
2020-02-20 16:08 ` Alberto Garcia
2020-02-20 15:39 ` Max Reitz
2019-12-22 11:36 ` [RFC PATCH v3 05/27] qcow2: Document the Extended L2 Entries feature Alberto Garcia
2020-02-20 14:28 ` Eric Blake
2020-02-20 14:49 ` Alberto Garcia
2020-02-20 15:16 ` Eric Blake
2020-02-26 16:57 ` Alberto Garcia
2020-02-20 14:33 ` Eric Blake
2020-02-20 16:10 ` Alberto Garcia
2020-02-20 15:54 ` Max Reitz
2020-02-20 16:02 ` Eric Blake
2020-02-20 16:04 ` Alberto Garcia [this message]
2019-12-22 11:36 ` [RFC PATCH v3 06/27] qcow2: Add dummy has_subclusters() function Alberto Garcia
2020-02-20 15:24 ` Eric Blake
2020-02-20 16:03 ` Max Reitz
2019-12-22 11:36 ` [RFC PATCH v3 07/27] qcow2: Add subcluster-related fields to BDRVQcow2State Alberto Garcia
2020-02-20 15:28 ` Eric Blake
2020-02-20 16:34 ` Alberto Garcia
2020-02-20 16:48 ` Eric Blake
2020-02-21 13:14 ` Alberto Garcia
2020-02-20 16:15 ` Max Reitz
2019-12-22 11:36 ` [RFC PATCH v3 08/27] qcow2: Add offset_to_sc_index() Alberto Garcia
2020-02-20 16:19 ` Max Reitz
2019-12-22 11:36 ` [RFC PATCH v3 09/27] qcow2: Add l2_entry_size() Alberto Garcia
2020-02-20 16:24 ` Max Reitz
2019-12-22 11:36 ` [RFC PATCH v3 10/27] qcow2: Update get/set_l2_entry() and add get/set_l2_bitmap() Alberto Garcia
2020-02-20 16:27 ` Max Reitz
2020-02-21 13:57 ` Alberto Garcia
2019-12-22 11:36 ` [RFC PATCH v3 11/27] qcow2: Add QCow2SubclusterType and qcow2_get_subcluster_type() Alberto Garcia
2020-02-20 17:21 ` Max Reitz
2019-12-22 11:36 ` [RFC PATCH v3 12/27] qcow2: Replace QCOW2_CLUSTER_* with QCOW2_SUBCLUSTER_* Alberto Garcia
2020-02-21 11:35 ` Max Reitz
2020-02-21 15:14 ` Alberto Garcia
2019-12-22 11:36 ` [RFC PATCH v3 13/27] qcow2: Handle QCOW2_SUBCLUSTER_UNALLOCATED_ALLOC Alberto Garcia
2020-02-21 12:02 ` Max Reitz
2019-12-22 11:36 ` [RFC PATCH v3 14/27] qcow2: Add subcluster support to calculate_l2_meta() Alberto Garcia
2020-02-21 13:34 ` Max Reitz
2019-12-22 11:36 ` [RFC PATCH v3 15/27] qcow2: Add subcluster support to qcow2_get_cluster_offset() Alberto Garcia
2020-02-21 14:21 ` Max Reitz
2019-12-22 11:36 ` [RFC PATCH v3 16/27] qcow2: Add subcluster support to zero_in_l2_slice() Alberto Garcia
2020-02-21 14:37 ` Max Reitz
2019-12-22 11:36 ` [RFC PATCH v3 17/27] qcow2: Add subcluster support to discard_in_l2_slice() Alberto Garcia
2020-02-21 14:45 ` Max Reitz
2019-12-22 11:36 ` [RFC PATCH v3 18/27] qcow2: Add subcluster support to check_refcounts_l2() Alberto Garcia
2020-02-21 14:47 ` Max Reitz
2019-12-22 11:37 ` [RFC PATCH v3 19/27] qcow2: Add subcluster support to expand_zero_clusters_in_l1() Alberto Garcia
2020-02-21 14:57 ` Max Reitz
2020-02-26 17:19 ` Alberto Garcia
2020-02-27 9:17 ` Max Reitz
2019-12-22 11:37 ` [RFC PATCH v3 20/27] qcow2: Fix offset calculation in handle_dependencies() Alberto Garcia
2020-02-21 15:01 ` Max Reitz
2019-12-22 11:37 ` [RFC PATCH v3 21/27] qcow2: Update L2 bitmap in qcow2_alloc_cluster_link_l2() Alberto Garcia
2020-02-21 15:43 ` Max Reitz
2019-12-22 11:37 ` [RFC PATCH v3 22/27] qcow2: Clear the L2 bitmap when allocating a compressed cluster Alberto Garcia
2020-02-21 15:46 ` Max Reitz
2019-12-22 11:37 ` [RFC PATCH v3 23/27] qcow2: Add subcluster support to handle_alloc_space() Alberto Garcia
2020-02-21 15:56 ` Max Reitz
2019-12-22 11:37 ` [RFC PATCH v3 24/27] qcow2: Restrict qcow2_co_pwrite_zeroes() to full clusters only Alberto Garcia
2020-02-21 16:02 ` Max Reitz
2019-12-22 11:37 ` [RFC PATCH v3 25/27] qcow2: Add the 'extended_l2' option and the QCOW2_INCOMPAT_EXTL2 bit Alberto Garcia
2020-02-20 14:12 ` Eric Blake
2020-02-20 14:16 ` Alberto Garcia
2020-02-21 16:44 ` Max Reitz
2019-12-22 11:37 ` [RFC PATCH v3 26/27] qcow2: Add subcluster support to qcow2_measure() Alberto Garcia
2020-02-21 16:52 ` Max Reitz
2019-12-22 11:37 ` [RFC PATCH v3 27/27] iotests: Add tests for qcow2 images with extended L2 entries Alberto Garcia
2020-02-21 17:04 ` Max Reitz
2020-02-21 17:10 ` [RFC PATCH v3 00/27] Add subcluster allocation to qcow2 Max Reitz
2020-02-22 17:59 ` Alberto Garcia
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