[pve-devel] [PATCH qemu-server v1 1/5] fix #6370: virtiofs: add support for thread-pool-size option

[Markus Frank]

Allows tuning the number of worker threads used by virtiofsd.

Signed-off-by: Markus Frank <m.frank at proxmox.com>
---
 PVE/QemuServer/Virtiofs.pm | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/PVE/QemuServer/Virtiofs.pm b/PVE/QemuServer/Virtiofs.pm
index cfde92c9..1894c95d 100644
--- a/PVE/QemuServer/Virtiofs.pm
+++ b/PVE/QemuServer/Virtiofs.pm
@@ -57,6 +57,13 @@ my $virtiofs_fmt = {
 	default => 0,
 	optional => 1,
     },
+    'thread-pool-size' => {
+	type => 'integer',
+	description => "Controls the maximum number of worker threads used by virtiofsd to handle"
+	    ." requests. A value of '0' disables the thread pool.",
+	default => 0,
+	optional => 1,
+    },
 };
 PVE::JSONSchema::register_format('pve-qm-virtiofs', $virtiofs_fmt);
 
@@ -172,6 +179,8 @@ sub start_virtiofsd {
 	    my $cmd = [$virtiofsd_bin, "--fd=$fd", "--shared-dir=$path"];
 	    push @$cmd, '--xattr' if $virtiofs->{'expose-xattr'};
 	    push @$cmd, '--posix-acl' if $virtiofs->{'expose-acl'};
+	    push @$cmd, '--thread-pool-size='.$virtiofs->{'thread-pool-size'}
+		if $virtiofs->{'thread-pool-size'};
 	    push @$cmd, '--announce-submounts';
 	    push @$cmd, '--allow-direct-io' if $virtiofs->{'direct-io'};
 	    push @$cmd, '--cache='.$virtiofs->{cache} if $virtiofs->{cache};
-- 
2.39.5