Re: [PATCH] vfs: Add a trace point in the mark_inode_dirty function

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> Signed-of-by: Arjan van de Ven <arjan@xxxxxxxxxxxxxxx>
> ---
>  fs/fs-writeback.c                |    3 +++
>  include/linux/fs.h               |   12 ++++++++++++
>  include/trace/events/writeback.h |   28 ++++++++++++++++++++++++++++
>  3 files changed, 43 insertions(+), 0 deletions(-)
> 
> diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
> index 3d06ccc..62e33cc 100644
> --- a/fs/fs-writeback.c
> +++ b/fs/fs-writeback.c
> @@ -952,6 +952,9 @@ void __mark_inode_dirty(struct inode *inode, int flags)
>  	if ((inode->i_state & flags) == flags)
>  		return;
>  
> +	if (flags & (I_DIRTY_SYNC | I_DIRTY_DATASYNC | I_DIRTY_PAGES))
> +		trace_writeback_inode_dirty(inode, flags);
> +

Why can't we move this branch into TP_fast_assign()?



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