[pve-devel] [PATCH proxmox-backup 2/3] file-restore: set zfs_arc_min to current minimum of 32M

Stoiko Ivanov s.ivanov at proxmox.com
Thu Jun 15 12:42:56 CEST 2023

zfs_arc_min was raised to 32M (for linux) in zfs-commit

while the current logic would still set the min_size to 32M (it's
max(32M, allmem/32), which results to 32M for memory sizes up to
1024M), setting it explicitly to the minimum makes it clear, and will
still be kept should the restore vm have more than 1G of memory at
some point.

Signed-off-by: Stoiko Ivanov <s.ivanov at proxmox.com>
 proxmox-file-restore/src/qemu_helper.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/proxmox-file-restore/src/qemu_helper.rs b/proxmox-file-restore/src/qemu_helper.rs
index 12c8cabf..0219a310 100644
--- a/proxmox-file-restore/src/qemu_helper.rs
+++ b/proxmox-file-restore/src/qemu_helper.rs
@@ -260,7 +260,7 @@ pub async fn start_vm(
         // NOTE: ZFS requires that the ARC can at least grow to the max transaction size of 64MB
         // also: setting any of min/max to zero will rather do the opposite of what one wants here
-            "{} panic=1 zfs.zfs_arc_min=16777216 zfs.zfs_arc_max=67108864 memhp_default_state=online_kernel",
+            "{} panic=1 zfs.zfs_arc_min=33554432 zfs.zfs_arc_max=67108864 memhp_default_state=online_kernel",
             if debug { "debug" } else { "quiet" }

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