linux-ext4 - Re: Potential bug in mballoc --- reusing data blocks before txn commit

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Date:	Mon, 29 Sep 2008 19:05:49 -0400
From:	Ric Wheeler <rwheeler@...hat.com>
To:	Theodore Tso <tytso@....edu>
CC:	Ric Wheeler <rwheeler@...hat.com>, Alex Tomas <bzzz@....com>,
	Andreas Dilger <adilger@....com>, linux-ext4@...r.kernel.org
Subject: Re: Potential bug in mballoc --- reusing data blocks before txn commit

Theodore Tso wrote:
> On Mon, Sep 29, 2008 at 05:04:04PM -0400, Ric Wheeler wrote:
>   
>> I don't disagree with any of the above, just want to point out that TRIM  
>> has a  SCSI T10 cousin that is very similar (used to implement thinly  
>> provisioned luns). We should make sure as much as possible to make our  
>> file system level support work for both...
>>
>>     
>
> That's shouldn't be a problem.  David Woodhouse created a standard
> block device interface that should be suitable both for ATA and SCSI:
>
>     int blkdev_issue_discard(struct block_device *bdev, sector_t sector,
> 		         unsigned nr_sects, bio_end_io_t end_io);
>
> 							- Ted
>
>   

I know, just wanted to point out to the broader audience that it is not 
just trim ;-)

ric

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