linux-ext4 - Re: [PATCH 01/02] ext2: reserve INCOMPAT

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Date:	Wed, 07 Dec 2011 18:14:23 +0800
From:	Tao Ma <tm@....ma>
To:	Andreas Dilger <adilger@...mcloud.com>
CC:	djwong@...ibm.com, Theodore Ts'o <tytso@....edu>,
	ext4 development <linux-ext4@...r.kernel.org>,
	Liang Zhen <liang@...mcloud.com>
Subject: Re: [PATCH 01/02] ext2: reserve INCOMPAT_INLINEDATA feature flag

On 12/07/2011 05:45 PM, Andreas Dilger wrote:
> On 2011-12-06, at 5:39 PM, Darrick J. Wong wrote:
>> On Tue, Dec 06, 2011 at 05:13:51PM -0700, Andreas Dilger wrote:
>>> +#define EXT4_FEATURE_INCOMPAT_INLINEDATA	0x2000 /* data in inode */
>>
>> I was using 0x2000 for EXT4_FEATURE_INCOMPAT_BG_USE_META_CSUM, to change
>> the block group checksum to use crc32c.
> 
> I didn't see that...  I was looking at your patch and only noticed
> EXT4_FEATURE_RO_COMPAT_METADATA_CSUM.  I suspect your patch is closer
> to landing it is better to use the 0x2000 value for BG_USE_META_CSUM,
> and change the value for INLINEDATA to 0x8000 instead.
OK, I will use this number for inline data for the new version if there
is no objection.

Thanks
Tao
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