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From: Alexandre Derumier <aderumier@odiso.com>
To: pve-devel@lists.proxmox.com
Date: Mon, 19 Jun 2023 09:28:40 +0200
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Subject: [pve-devel] [PATCH v6 qemu-server 09/10] memory: virtio-mem :
implement redispatch retry.
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If some memory can be removed on a specific node,
we try to rebalance again on other nodes
Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
---
PVE/QemuServer/Memory.pm | 59 +++++++++++++++++++++++++++++-----------
1 file changed, 43 insertions(+), 16 deletions(-)
diff --git a/PVE/QemuServer/Memory.pm b/PVE/QemuServer/Memory.pm
index dcdf318..86ab16b 100644
--- a/PVE/QemuServer/Memory.pm
+++ b/PVE/QemuServer/Memory.pm
@@ -203,13 +203,32 @@ my sub get_virtiomem_total_current_size {
return $size;
}
+my sub get_virtiomem_total_errors_size {
+ my ($mems) = @_;
+
+ my $size = 0;
+ for my $mem (values %$mems) {
+ next if !$mem->{error};
+ $size += $mem->{current};
+ }
+ return $size;
+}
+
my sub balance_virtiomem {
my ($vmid, $virtiomems, $blocksize, $target_total) = @_;
- my $nb_virtiomem = scalar(keys %$virtiomems);
+ my $nb_virtiomem = scalar(grep { !$_->{error} } values $virtiomems->%*);
print"try to balance memory on $nb_virtiomem virtiomems\n";
+ my $target_total_err = undef;
+ if($target_total < 0) {
+ $target_total = 0;
+ $target_total_err = 1;
+ }
+
+ die "No more virtiomem devices left to try to balance the remaining memory\n" if $nb_virtiomem == 0;
+
#if we can't share exactly the same amount, we add the remainder on last node
my $target_aligned = int( $target_total / $nb_virtiomem / $blocksize) * $blocksize;
my $target_remaining = $target_total - ($target_aligned * ($nb_virtiomem-1));
@@ -217,6 +236,7 @@ my sub balance_virtiomem {
my $i = 0;
foreach my $id (sort keys %$virtiomems) {
my $virtiomem = $virtiomems->{$id};
+ next if $virtiomem->{error};
$i++;
my $virtiomem_target = $i == $nb_virtiomem ? $target_remaining : $target_aligned;
$virtiomem->{completed} = 0;
@@ -234,7 +254,6 @@ my sub balance_virtiomem {
}
my $total_finished = 0;
- my $error = undef;
while ($total_finished != $nb_virtiomem) {
@@ -258,6 +277,7 @@ my sub balance_virtiomem {
if($virtiomem->{current} == $virtiomem->{target}) {
print"virtiomem$id: completed\n";
$virtiomem->{completed} = 1;
+ $virtiomem->{last} = $virtiomem->{current};
next;
}
@@ -271,7 +291,6 @@ my sub balance_virtiomem {
if($virtiomem->{retry} >= 5) {
print "virtiomem$id: target memory still not reached, ignoring device from now on\n";
$virtiomem->{error} = 1;
- $error = 1;
#as change is async, we don't want that value change after the api call
eval {
mon_cmd(
@@ -286,7 +305,9 @@ my sub balance_virtiomem {
$virtiomem->{retry}++;
}
}
- die "No more available blocks in virtiomem to balance all requested memory\n" if $error;
+
+ die "No more virtiomem devices left to try to balance the remaining memory\n"
+ if $target_total_err;
}
sub get_numa_node_list {
@@ -392,18 +413,24 @@ sub qemu_memory_hotplug {
};
}
- my $target_total = $value - $static_memory;
- my $err;
- eval {
- balance_virtiomem($vmid, $virtiomems, $blocksize, $target_total);
- };
- $err = $@ if $@;
-
- my $current_memory = $static_memory + get_virtiomem_total_current_size($virtiomems);
- $newmem->{current} = $current_memory;
- $conf->{memory} = print_memory($newmem);
- PVE::QemuConfig->write_config($vmid, $conf);
- die $err if $err;
+ while (1) {
+
+ my $target_total = $value - $static_memory - get_virtiomem_total_errors_size($virtiomems);
+ my $err;
+ eval {
+ balance_virtiomem($vmid, $virtiomems, $blocksize, $target_total);
+ };
+ $err = $@ if $@;
+
+ my $current_memory = $static_memory + get_virtiomem_total_current_size($virtiomems);
+ $newmem->{current} = $current_memory;
+ $conf->{memory} = print_memory($newmem);
+ PVE::QemuConfig->write_config($vmid, $conf);
+
+ die $err if $err;
+ last if $current_memory == $value;
+ }
+ return $conf->{memory};
} elsif ($value > $memory) {
--
2.39.2