Re: [PATCH v2] direct-io: only inc/dec inode->i_dio_count for file systems

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On Wed, Apr 15, 2015 at 04:01:35PM -0600, Jens Axboe wrote:
> Hi,
> 
> A proper patch series posting of the patch to skip inode dio counts
> where we don't need them. Performance results and general notes in
> patch #1. We can take this a bit further if we want to push this
> truncate locking into the caller, but I'd like to keep that as a
> separate patch series instead.
> 
> Changes since v2:
> 
> - Changed flag to DIO_SKIP_DIO_COUNT. Patch 2+3 will use this for
>   skipping the extra inc/dec for btrfs and ext4, so better rename it
>   to something that better tells what is happening in the deep mess
>   that is dio.
> 
> - Have inode_dio_inc/dec() helpers. Again, this better tells the caller
>   what is going on.

Please, rebase on vfs.git#for-next; it conflicts (at least) with Omar's
->direct_IO() patches, if not with generic_write_checks() ones following
those.
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