+++ /dev/null
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: Fiona Ebner <f.ebner@proxmox.com>
-Date: Mon, 3 Oct 2022 15:52:04 +0200
-Subject: [PATCH] PVE Backup: allow passing max-workers performance setting
-
-For query-proxmox-support, add an indication that it's possible to use
-the setting.
-
-For now, the other two BackupPerf settings are not exposed:
-
-* use-copy-range: would need to be implemented by the backup-dump
-block driver first, and in fact, the default for backup was changed,
-because it wasn't as fast for backup in QEMU, see commit
-6a30f663d4c0b3c45a544d541e0c4e214b2473a1.
-
-* max-chunk: enforced to be at least the backup cluster size, which is
-4 MiB for PBS and otherwise maximum of source and target cluster size.
-And block-copy has a maximum buffer size of 1 MiB, so setting a larger
-max-chunk doesn't even have an effect. To make the setting sensibly
-usable the check would need to be removed and optionally the
-block-copy max buffer size would need to be bumped. I tried doing just
-that, and tested different source/target combinations with different
-max-chunk settings, but there were no noticable improvements over the
-default "unlimited" (resulting in 1 MiB for block-copy).
-
-Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
----
- block/monitor/block-hmp-cmds.c | 4 +++-
- pve-backup.c | 18 +++++++++++++-----
- qapi/block-core.json | 9 +++++++--
- 3 files changed, 23 insertions(+), 8 deletions(-)
-
-diff --git a/block/monitor/block-hmp-cmds.c b/block/monitor/block-hmp-cmds.c
-index 0502f42be6..cc231ec3f2 100644
---- a/block/monitor/block-hmp-cmds.c
-+++ b/block/monitor/block-hmp-cmds.c
-@@ -1049,7 +1049,9 @@ void coroutine_fn hmp_backup(Monitor *mon, const QDict *qdict)
- false, false, // PBS encrypt
- true, dir ? BACKUP_FORMAT_DIR : BACKUP_FORMAT_VMA,
- false, NULL, false, NULL, !!devlist,
-- devlist, qdict_haskey(qdict, "speed"), speed, &error);
-+ devlist, qdict_haskey(qdict, "speed"), speed,
-+ false, 0, // BackupPerf max-workers
-+ &error);
-
- hmp_handle_error(mon, error);
- }
-diff --git a/pve-backup.c b/pve-backup.c
-index 2e22030eec..e9aa7e0f49 100644
---- a/pve-backup.c
-+++ b/pve-backup.c
-@@ -55,6 +55,7 @@ static struct PVEBackupState {
- bool starting;
- } stat;
- int64_t speed;
-+ BackupPerf perf;
- VmaWriter *vmaw;
- ProxmoxBackupHandle *pbs;
- GList *di_list;
-@@ -492,8 +493,6 @@ static void create_backup_jobs_bh(void *opaque) {
- }
- backup_state.txn = job_txn_new_seq();
-
-- BackupPerf perf = { .max_workers = 16 };
--
- /* create and start all jobs (paused state) */
- GList *l = backup_state.di_list;
- while (l) {
-@@ -513,8 +512,9 @@ static void create_backup_jobs_bh(void *opaque) {
-
- BlockJob *job = backup_job_create(
- NULL, di->bs, di->target, backup_state.speed, sync_mode, di->bitmap,
-- bitmap_mode, false, NULL, &perf, BLOCKDEV_ON_ERROR_REPORT, BLOCKDEV_ON_ERROR_REPORT,
-- JOB_DEFAULT, pvebackup_complete_cb, di, backup_state.txn, &local_err);
-+ bitmap_mode, false, NULL, &backup_state.perf, BLOCKDEV_ON_ERROR_REPORT,
-+ BLOCKDEV_ON_ERROR_REPORT, JOB_DEFAULT, pvebackup_complete_cb, di, backup_state.txn,
-+ &local_err);
-
- di->job = job;
- if (job) {
-@@ -584,7 +584,9 @@ UuidInfo coroutine_fn *qmp_backup(
- bool has_config_file, const char *config_file,
- bool has_firewall_file, const char *firewall_file,
- bool has_devlist, const char *devlist,
-- bool has_speed, int64_t speed, Error **errp)
-+ bool has_speed, int64_t speed,
-+ bool has_max_workers, int64_t max_workers,
-+ Error **errp)
- {
- assert(qemu_in_coroutine());
-
-@@ -914,6 +916,11 @@ UuidInfo coroutine_fn *qmp_backup(
-
- backup_state.speed = (has_speed && speed > 0) ? speed : 0;
-
-+ backup_state.perf = (BackupPerf){ .max_workers = 16 };
-+ if (has_max_workers) {
-+ backup_state.perf.max_workers = max_workers;
-+ }
-+
- backup_state.vmaw = vmaw;
- backup_state.pbs = pbs;
-
-@@ -1089,5 +1096,6 @@ ProxmoxSupportStatus *qmp_query_proxmox_support(Error **errp)
- ret->pbs_dirty_bitmap_migration = true;
- ret->query_bitmap_info = true;
- ret->pbs_masterkey = true;
-+ ret->backup_max_workers = true;
- return ret;
- }
-diff --git a/qapi/block-core.json b/qapi/block-core.json
-index 89875f309c..43281aca79 100644
---- a/qapi/block-core.json
-+++ b/qapi/block-core.json
-@@ -833,6 +833,8 @@
- #
- # @encrypt: use encryption ((optional for format 'pbs', defaults to true if there is a keyfile)
- #
-+# @max-workers: see @BackupPerf for details. Default 16.
-+#
- # Returns: the uuid of the backup job
- #
- ##
-@@ -851,7 +853,9 @@
- '*format': 'BackupFormat',
- '*config-file': 'str',
- '*firewall-file': 'str',
-- '*devlist': 'str', '*speed': 'int' },
-+ '*devlist': 'str',
-+ '*speed': 'int',
-+ '*max-workers': 'int' },
- 'returns': 'UuidInfo', 'coroutine': true }
-
- ##
-@@ -906,7 +910,8 @@
- 'pbs-dirty-bitmap-savevm': 'bool',
- 'pbs-dirty-bitmap-migration': 'bool',
- 'pbs-masterkey': 'bool',
-- 'pbs-library-version': 'str' } }
-+ 'pbs-library-version': 'str',
-+ 'backup-max-workers': 'bool' } }
-
- ##
- # @query-proxmox-support:
projects / pve-qemu.git / blobdiff