Re: [PATCH] O_DIRECT for ext3 (2.4.21)

Stephen C. Tweedie (sct@redhat.com)
17 Jun 2003 21:46:59 +0100


Hi,

On Tue, 2003-06-17 at 21:19, Andrew Morton wrote:

> It works out OK in 2.5, and we should do it this way in 2.4 too:
>
> - dentry_open() checks for inode->i_mapping->a_ops->direct_IO
>
> - setfl() checks for inode->i_mapping->a_ops->direct_IO
>
> - the a_ops for data-journalled inodes have a null ->direct_IO.

That's what the -aa patches do, and I've got those queued in my local
O_DIRECT stuff already. ext3 will just expose a different a_ops for
data-journaled files.

Cheers,
Stephen

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