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Re: [dm-devel] [PATCH 26/30] ext4: do not send discards as barriers
- From: Tejun Heo <tj kernel org>
- To: Christoph Hellwig <hch lst de>, jack suse cz
- Cc: jeremy goop org, snitzer redhat com, mst redhat com, linux-ide vger kernel org, dm-devel redhat com, James Bottomley suse de, konishi ryusuke lab ntt co jp, k-ueda ct jp nec com, vst vlnb net, linux-scsi vger kernel org, Christoph Hellwig <hch infradead org>, rusty rustcorp com au, linux-raid vger kernel org, swhiteho redhat com, chris mason oracle com, tytso mit edu, jaxboe fusionio com, linux-kernel vger kernel org, linux-fsdevel vger kernel org, rwheeler redhat com
- Subject: Re: [dm-devel] [PATCH 26/30] ext4: do not send discards as barriers
- Date: Wed, 25 Aug 2010 17:57:41 +0200
On 08/25/2010 06:00 PM, Christoph Hellwig wrote:
> On Wed, Aug 25, 2010 at 05:58:42PM +0200, Christoph Hellwig wrote:
>> On Wed, Aug 25, 2010 at 05:47:43PM +0200, Tejun Heo wrote:
>>> From: Christoph Hellwig <hch infradead org>
>>>
>>> ext4 already uses synchronous discards, no need to add I/O barriers.
>>
>> This needs the patch that Jan sent in reply to my initial version merged
>> into it.
>
> Actually the jbd2 patch needs it merged, but the point still stands.
Yeah, wasn't sure about that one. Has anyone tested it? I'll be
happy to merge it but I have no idea whether it's correct or not and
Jan didn't seem to have tested it so... Jan, shall I merge the patch?
Thanks.
--
tejun
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