[pve-devel] [PATCH qemu-server] fix #3329: turn on cache=writeback for efidisks on rbd

[Maximilian Hill]

Hello,

On Wed, Jun 16, 2021 at 03:09:33PM +0200, Dominik Csapak wrote:
> on slower ceph clusters, the write pattern of the ovmf booting process
> slows down the boot of the vm, so we turn on caching by default
> 
> +	my $cache = "";
> +	if ($path =~ m/^rbd:/) {
> +	    $cache = ',cache=writeback';
does this work, evven if the rbd storage is not called "rbd"?
> +	}
> +
>  	push @$cmd, '-drive', "if=pflash,unit=0,format=raw,readonly=on,file=$ovmf_code";
> -	push @$cmd, '-drive', "if=pflash,unit=1,format=$format,id=drive-efidisk0$size_str,file=$path";
> +	push @$cmd, '-drive', "if=pflash,unit=1$cache,format=$format,id=drive-efidisk0$size_str,file=$path";
>      }
>  
>      # load q35 config
> -- 
> 2.20.1
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