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From: Fiona Ebner <f.ebner@proxmox.com>
To: pve-devel@lists.proxmox.com
Date: Fri, 10 Feb 2023 15:19:10 +0100
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Subject: [pve-devel] [PATCH qemu-server 2/4] drive commandline: factor out
checks if io_uring is allowed by default
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while getting rid of the double negation.
In preparation to re-use the check for live disk cloning.
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
---
PVE/QemuServer.pm | 30 ++++++++++++++++++------------
1 file changed, 18 insertions(+), 12 deletions(-)
diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index 6130fe82..10d29a06 100644
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -1598,6 +1598,23 @@ sub get_initiator_name {
return $initiator;
}
+my sub storage_allows_io_uring_default {
+ my ($scfg, $cache_direct) = @_;
+
+ # io_uring with cache mode writeback or writethrough on krbd will hang...
+ return if $scfg && $scfg->{type} eq 'rbd' && $scfg->{krbd} && !$cache_direct;
+
+ # io_uring with cache mode writeback or writethrough on LVM will hang, without cache only
+ # sometimes, just plain disable...
+ return if $scfg && $scfg->{type} eq 'lvm';
+
+ # io_uring causes problems when used with CIFS since kernel 5.15
+ # Some discussion: https://www.spinics.net/lists/linux-cifs/msg26734.html
+ return if $scfg && $scfg->{type} eq 'cifs';
+
+ return 1;
+}
+
sub print_drive_commandline_full {
my ($storecfg, $vmid, $drive, $pbs_name, $io_uring) = @_;
@@ -1680,19 +1697,8 @@ sub print_drive_commandline_full {
$cache_direct = 1;
}
- # io_uring with cache mode writeback or writethrough on krbd will hang...
- my $rbd_no_io_uring = $scfg && $scfg->{type} eq 'rbd' && $scfg->{krbd} && !$cache_direct;
-
- # io_uring with cache mode writeback or writethrough on LVM will hang, without cache only
- # sometimes, just plain disable...
- my $lvm_no_io_uring = $scfg && $scfg->{type} eq 'lvm';
-
- # io_uring causes problems when used with CIFS since kernel 5.15
- # Some discussion: https://www.spinics.net/lists/linux-cifs/msg26734.html
- my $cifs_no_io_uring = $scfg && $scfg->{type} eq 'cifs';
-
if (!$drive->{aio}) {
- if ($io_uring && !$rbd_no_io_uring && !$lvm_no_io_uring && !$cifs_no_io_uring) {
+ if ($io_uring && storage_allows_io_uring_default($scfg, $cache_direct)) {
# io_uring supports all cache modes
$opts .= ",aio=io_uring";
} else {
--
2.30.2