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From: Fiona Ebner <f.ebner@proxmox.com>
To: pve-devel@lists.proxmox.com
Subject: [pve-devel] [PATCH v2 guest-common] vzdump: config: improve description of ionice setting
Date: Wed,  7 Jun 2023 16:54:50 +0200	[thread overview]
Message-ID: <20230607145450.84160-4-f.ebner@proxmox.com> (raw)
In-Reply-To: <20230607145450.84160-1-f.ebner@proxmox.com>

The CFQ scheduler was removed with Linux 5.0 and ionice is now used
by the newer BFQ scheduler. Mention what the special value 8 does.
Also mention that for snapshot and suspend mode backups of VMs, the
setting only affects the compressor, because the kvm process is not a
child process of vzdump then and does not inherit the ionice priority.

Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
---

No changes in v2.

 src/PVE/VZDump/Common.pm | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/PVE/VZDump/Common.pm b/src/PVE/VZDump/Common.pm
index 64c4e4e..a6fe483 100644
--- a/src/PVE/VZDump/Common.pm
+++ b/src/PVE/VZDump/Common.pm
@@ -212,7 +212,10 @@ my $confdesc = {
     },
     ionice => {
 	type => 'integer',
-	description => "Set CFQ ionice priority.",
+	description => "Set IO priority when using the BFQ scheduler. For snapshot and suspend "
+	    ."mode backups of VMs, this only affects the compressor. A value of 8 means the idle "
+	    ."priority is used, otherwise the best-effort priority is used with the specified "
+	    ."value.",
 	optional => 1,
 	minimum => 0,
 	maximum => 8,
-- 
2.39.2





  parent reply	other threads:[~2023-06-07 14:55 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-06-07 14:54 [pve-devel] [PATCH v2 manager 1/2] close #4513: ui: backup job: add performance tab Fiona Ebner
2023-06-07 14:54 ` [pve-devel] [PATCH v2 manager 2/2] ui: backup job: disable zstd thread count field when zstd isn't used Fiona Ebner
2023-06-07 14:54 ` [pve-devel] [PATCH v2 docs] backup: update information about performance settings Fiona Ebner
2023-06-07 14:54 ` Fiona Ebner [this message]
2023-06-07 17:18   ` [pve-devel] applied: [PATCH v2 guest-common] vzdump: config: improve description of ionice setting Thomas Lamprecht

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