On Aug 4, 2020, at 7:02 PM, brookxu <brookxu.cn@xxxxxxxxx> wrote:
>
> Add the needed value to ext4_mb_discard_preallocations trace, so
> we can more easily observe the requested number of trim.
>
> Signed-off-by: Chunguang Xu <brookxu@xxxxxxxxxxx>
IMHO, this should be part of the previous patch that is changing the
API for ext4_discard_preallocations().
Cheers, Andreas
> ---
> include/trace/events/ext4.h | 14 ++++++++------
> 1 file changed, 8 insertions(+), 6 deletions(-)
>
> diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
> index cc41d69..61736d8 100644
> --- a/include/trace/events/ext4.h
> +++ b/include/trace/events/ext4.h
> @@ -746,24 +746,26 @@
> );
>
> TRACE_EVENT(ext4_discard_preallocations,
> - TP_PROTO(struct inode *inode),
> + TP_PROTO(struct inode *inode, unsigned int needed),
>
> - TP_ARGS(inode),
> + TP_ARGS(inode, needed),
>
> TP_STRUCT__entry(
> - __field( dev_t, dev )
> - __field( ino_t, ino )
> + __field( dev_t, dev )
> + __field( ino_t, ino )
> + __field( unsigned int, needed )
>
> ),
>
> TP_fast_assign(
> __entry->dev = inode->i_sb->s_dev;
> __entry->ino = inode->i_ino;
> + __entry->needed = needed;
> ),
>
> - TP_printk("dev %d,%d ino %lu",
> + TP_printk("dev %d,%d ino %lu needed %u",
> MAJOR(__entry->dev), MINOR(__entry->dev),
> - (unsigned long) __entry->ino)
> + (unsigned long) __entry->ino, __entry->needed)
> );
>
> TRACE_EVENT(ext4_mb_discard_preallocations,
>
> --
> 1.8.3.1
>
Cheers, Andreas
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