linux-kernel - Re: [PATCH, RFC] xfs: batched discard support

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Date:	Sat, 15 Aug 2009 22:25:00 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Mark Lord <liml@....ca>
Cc:	Christoph Hellwig <hch@...radead.org>, xfs@....sgi.com,
	linux-fsdevel@...r.kernel.org, linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org, jens.axboe@...cle.com
Subject: Re: [PATCH, RFC] xfs: batched discard support

On Sat, Aug 15, 2009 at 10:19:21PM -0400, Mark Lord wrote:
> Mark Lord wrote:
>> Christoph Hellwig wrote:
> ..
>>> Mark, any chance to try it?  Just create an XFS filesystem, age it a
>>> bit and then call the attached little trim.c program on the mountmoint
>>> (or any file inside the filesystem for that matter)
>> ..
>>
>> Looking at it now.  Thanks, Christoph!
> ..
>
> Fails to work on 64-bit kernel w/ 32-bit userspace (no compat ioctl).
> Rebuilding with 32-bit kernel now..

The actual ioctl is compatible, just add the

	case XFS_IOC_TRIM:
		return xfs_ioc_trim(mp, arg);

to xfs_file_compat_ioctl().  I'll add this to the next spin of the
patch.

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