linux-ext4 - Re: [RFC] basic delayed allocation in ext4

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Date:	Thu, 26 Jul 2007 15:50:46 +0400
From:	Alex Tomas <alex@...sterfs.com>
To:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
CC:	ext4 development <linux-ext4@...r.kernel.org>,
	linux-fsdevel@...r.kernel.org
Subject: Re: [RFC] basic delayed allocation in ext4

Aneesh Kumar K.V wrote:
>> +    /* first, we need to know whether the block is allocated already
>> +     * XXX: when the filesystem has a lot of free blocks, we could
>> +     * reserve even allocated blocks to save this lookup */
>> +    ret = ext4_get_blocks_wrap(NULL, inode, iblock, 1,  bh_result, 0, 
>> 0);
>> +    if (ret >= 0) {
> 
> 
> I guess this should be (ret > 0)

well, no. it has to catch allocated and non-allocated blocks
(though can be written more clear, probably)

> I was not able to find mpage_da_writepages()..

sorry, it's part of vfs delayed allocation patch, should be on the list now.

thanks, Alex


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