Re: [PATCH] Btrfs-progs: btrfs file system size should be bigger then 256m

[Shen Feng <shen@cn.fujitsu.com>]

My test shows that at least 100M is needed for a btrfs partition.

on 12/31/2008 03:41 PM, Lee Trager wrote:
> This has been bothering me for some time. Why does btrfs need to have a
> disk greater then 256M? I could see a much smaller limit, say 16M but
> why so much? The file system itself does not need that much space for
> its own use.
> 
> Thanks,
> 
> Lee
> 
> Shen Feng wrote:
>> According to btrfs_prepare_device, btrfs file sysstem size
>> should be bigger then 256m.
>>
>> If mkfs.btrfs specifies the file system size samaller then
>> that, mkfs.btrfs should report error.
>>
>> Signed-off-by: Shen Feng <shen@cn.fujitsu.com>
>> ---
>>  mkfs.c |    4 ++++
>>  1 files changed, 4 insertions(+), 0 deletions(-)
>>
>> diff --git a/mkfs.c b/mkfs.c
>> index be93aaa..447e8d7 100644
>> --- a/mkfs.c
>> +++ b/mkfs.c
>> @@ -377,6 +377,10 @@ int main(int ac, char **av)
>>                  break;
>>              case 'b':
>>                  block_count = parse_size(optarg);
>> +                if (block_count < 256*1024*1024) {
>> +                    fprintf(stderr, "File system size is too small\n");
>> +                    exit(1);
>> +                }
>>                  zero_end = 0;
>>                  break;
>>              default:
>>   
> 
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> 

-- 
Best Regards,
--------------------------------------------------
Shen Feng
Development Dept.I
Nanjing Fujitsu Nanda Software Tech. Co., Ltd.(FNST)
8/F., Civil Defense Building, No.189 Guangzhou Road,
Nanjing, 210029, China
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