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Re: [Qemu-devel] [PATCH 2/5] migration: Create block capability
From: |
Juan Quintela |
Subject: |
Re: [Qemu-devel] [PATCH 2/5] migration: Create block capability |
Date: |
Wed, 17 May 2017 19:02:07 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/25.2 (gnu/linux) |
Eric Blake <address@hidden> wrote:
> On 05/17/2017 10:38 AM, Juan Quintela wrote:
>> Create one capability for block migration and one parameter for
>> incremental block migration.
>>
>> Signed-off-by: Juan Quintela <address@hidden>
>>
>> ---
>>
>> @@ -1207,6 +1242,26 @@ void qmp_migrate(const char *uri, bool has_blk, bool
>> blk,
>> return;
>> }
>>
>> + if (((has_blk && blk) || (has_inc && inc))
>> + && (migrate_use_block() || migrate_use_block_incremental())) {
>> + error_setg(errp, "Command options are incompatible with current "
>> + "migration capabilities");
>> + return;
>> + }
>> +
>> + if ((has_blk && blk) || (has_inc & inc)) {
>> + migrate_set_block_enabled(true, &local_err);
>> + if (local_err) {
>> + error_propagate(errp, local_err);
>> + return;
>> + }
>> + s->must_remove_block_options = true;
>> + }
>
> You wrote:
> if (A && B) {
> error;
> }
> if (A) {
> stuff;
> }
>
> I might have done:
>
> if (A) {
> if (B) {
> error;
> }
> stuff;
> }
>
> but it's the same either way.
One less line, and as I have to respin due to the last patch.
>> +++ b/qapi-schema.json
>> @@ -894,11 +894,18 @@
>> # @release-ram: if enabled, qemu will free the migrated ram pages on the
>> source
>> # during postcopy-ram migration. (since 2.9)
>> #
>> +# @block: If enabled, QEMU will also migrate the contents of all block
>> +# devices. Default is disabled. A possible alternative are
>
> s/are/uses/
done
>> +# mirror jobs to a builtin NBD server on the destination, which
>> +# are more flexible.
>
> s/are more flexible/offers more flexibility/
done
>> +# (Since 2.10)
>> +#
>> # Since: 1.2
>> ##
>> { 'enum': 'MigrationCapability',
>> 'data': ['xbzrle', 'rdma-pin-all', 'auto-converge', 'zero-blocks',
>> - 'compress', 'events', 'postcopy-ram', 'x-colo', 'release-ram'] }
>> + 'compress', 'events', 'postcopy-ram', 'x-colo', 'release-ram',
>> + 'block' ] }
>>
>
> The grammar touchups can be done in preparing the pull request, if there
> is no other reason for a respin.
>
> Reviewed-by: Eric Blake <address@hidden>
Thanks, Juan.
- [Qemu-devel] [PATCH v5 0/5] Remove old MigrationParams, Juan Quintela, 2017/05/17
- [Qemu-devel] [PATCH 1/5] hmp: Use visitor api for hmp_migrate_set_parameter(), Juan Quintela, 2017/05/17
- [Qemu-devel] [PATCH 2/5] migration: Create block capability, Juan Quintela, 2017/05/17
- [Qemu-devel] [PATCH 3/5] migration: Remove use of old MigrationParams, Juan Quintela, 2017/05/17
- [Qemu-devel] [PATCH 4/5] migration: Remove old MigrationParams, Juan Quintela, 2017/05/17
- [Qemu-devel] [PATCH 5/5] block migration: Allow compile time disable, Juan Quintela, 2017/05/17