From: Fabian Ebner <f.ebner@proxmox.com>
To: Dietmar Maurer <dietmar@proxmox.com>,
Proxmox VE development discussion <pve-devel@lists.proxmox.com>,
Stefan Reiter <s.reiter@proxmox.com>
Subject: Re: [pve-devel] [PATCH qemu-server] fix #3324: clone disk: use larger blocksize for EFI disk when possible
Date: Mon, 1 Mar 2021 11:22:29 +0100 [thread overview]
Message-ID: <2faca1b5-fa84-e5a2-5c20-25a3925fa385@proxmox.com> (raw)
In-Reply-To: <909038762.124.1614593932855@webmail.proxmox.com>
Am 01.03.21 um 11:18 schrieb Dietmar Maurer:
>
>>>>> diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
>>>>> index f401baf..e579cdf 100644
>>>>> --- a/PVE/QemuServer.pm
>>>>> +++ b/PVE/QemuServer.pm
>>>>> @@ -6991,7 +6991,15 @@ sub clone_disk {
>>>>> # that is given by the OVMF_VARS.fd
>>>>> my $src_path = PVE::Storage::path($storecfg, $drive->{file});
>>>>> my $dst_path = PVE::Storage::path($storecfg, $newvolid);
>>>>> - run_command(['qemu-img', 'dd', '-n', '-O', $dst_format,
>>>>> "bs=1", "count=$size",
>>>>> +
>>>>> + # Ceph doesn't like too small blocksize, see bug #3324
>>>>> + my $bs = 1;
>>>>> + while ($bs < $size && $bs < 1024 && $size % $bs == 0) {
>>>>> + $bs *= 2;
>>>>> + }
>
> now, $size % $bs != 0
>
> I guess this is wrong...
>
No, because of the $bs < $size check first. If we enter the loop, $size
was a multiple of $bs and at least twice $bs. I wrote it like this
because it'd avoid an endless loop if for whatever reason $size is 0.
>>>>> + my $count = $size / $bs;
>>>>> +
>>>>> + run_command(['qemu-img', 'dd', '-n', '-O', $dst_format,
>>>>> "bs=$bs", "count=$count",
>>>>> "if=$src_path", "of=$dst_path"]);
>>>>> } else {
>>>>> qemu_img_convert($drive->{file}, $newvolid, $size,
>>>>> $snapname, $sparseinit);
>>>>>
>>
>>
>> _______________________________________________
>> pve-devel mailing list
>> pve-devel@lists.proxmox.com
>> https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-devel
next prev parent reply other threads:[~2021-03-01 10:22 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-01 9:42 Fabian Ebner
2021-03-01 9:54 ` Stefan Reiter
2021-03-01 10:06 ` Fabian Ebner
2021-03-01 10:13 ` Stefan Reiter
2021-03-01 10:18 ` Dietmar Maurer
2021-03-01 10:22 ` Fabian Ebner [this message]
2021-03-02 7:11 ` Fabian Ebner
2021-03-01 10:19 ` Fabian Ebner
2021-03-01 10:23 ` Fabian Ebner
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