Re: (3.9-rc5) WARNING: at fs/btrfs/super.c:255 __btrfs_abort_transaction

[Tsutomu Itoh <t-itoh@jp.fujitsu.com>]

On 2013/04/03 22:05, Chris Mason wrote:
> Quoting Tsutomu Itoh (2013-04-02 21:19:06)
>> Hi,
>>
>> When inode_cache was specified for the mount option, I encountered the
>> following messages at umount.
>>
>> Step to reproduce:
>>
>>   mkfs.btrfs -f /dev/sdc4
>>   mount -o compress=lzo,autodefrag,inode_cache /dev/sdc4 /test1
>>   dd if=/dev/zero of=/test1/file1 bs=1M count=8192
>>   dd if=/test1/file1 of=/dev/null bs=1M
>>   rm -f /test1/file1
>>   umount /test1
>> Apr  3 09:43:12 luna kernel: [  554.639149] BTRFS error (device sdc4) in btrfs_save_ino_cache:471: error 28
>
> We're running out of space while saving the inode cache.  Strictly
> speaking this should not abort the FS.  I'll take a look.

Umm, 8GB was only written in the filesystem of 20GB...

When only inode_cache was specified for the mount option
('mount -o inode_cache /dev/sdc4 /test1'), the error message was not output.
Is this information useful for any investigations?

Thanks,
Tsutomu