linux-kernel - Re: [PATCH -next v4 2/2] mm: vmscan: add new event to trace shrink lru

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Message-ID: <CAOUHufZjxjra9Cfw8YC2eA-xsikPw=K5=1ew55hKTdYhMwjUig@mail.gmail.com>
Date: Wed, 20 Dec 2023 10:54:37 -0700
From: Yu Zhao <yuzhao@...gle.com>
To: Bixuan Cui <cuibixuan@...o.com>
Cc: rostedt@...dmis.org, mhiramat@...nel.org, mathieu.desnoyers@...icios.com, 
	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org, 
	linux-trace-kernel@...r.kernel.org, linux-mm@...ck.org, 
	opensource.kernel@...o.com
Subject: Re: [PATCH -next v4 2/2] mm: vmscan: add new event to trace shrink lru

On Tue, Dec 19, 2023 at 6:22 PM Bixuan Cui <cuibixuan@...o.com> wrote:
>
> From: cuibixuan <cuibixuan@...o.com>
>
> Add a new event to calculate the shrink_inactive_list()/shrink_active_list()
> execution time.
>
> Example of output:
>          kswapd0-103     [007] .....  1098.353020: mm_vmscan_lru_shrink_active_start: nid=0
>          kswapd0-103     [007] .....  1098.353040: mm_vmscan_lru_shrink_active_end: nid=0 nr_taken=32 nr_active=0 nr_deactivated=32 nr_referenced=0 priority=6 flags=RECLAIM_WB_FILE|RECLAIM_WB_ASYNC
>          kswapd0-103     [007] .....  1098.353040: mm_vmscan_lru_shrink_inactive_start: nid=0
>          kswapd0-103     [007] .....  1098.353094: mm_vmscan_lru_shrink_inactive_end: nid=0 nr_scanned=32 nr_reclaimed=0 nr_dirty=0 nr_writeback=0 nr_congested=0 nr_immediate=0 nr_activate_anon=0 nr_activate_file=0 nr_ref_keep=32 nr_unmap_fail=0 priority=6 flags=RECLAIM_WB_ANON|RECLAIM_WB_ASYNC
>          kswapd0-103     [007] .....  1098.353094: mm_vmscan_lru_shrink_inactive_start: nid=0
>          kswapd0-103     [007] .....  1098.353162: mm_vmscan_lru_shrink_inactive_end: nid=0 nr_scanned=32 nr_reclaimed=21 nr_dirty=0 nr_writeback=0 nr_congested=0 nr_immediate=0 nr_activate_anon=0 nr_activate_file=0 nr_ref_keep=11 nr_unmap_fail=0 priority=6 flags=RECLAIM_WB_FILE|RECLAIM_WB_ASYNC
>
> Signed-off-by: Bixuan Cui <cuibixuan@...o.com>
> Reviewed-by: Andrew Morton <akpm@...ux-foundation.org>
> ---
> v4: Add Reviewed-by and Changlog to every patch.

Where did Andrew provide his Reviewed-by?

> v2: Modify trace_mm_vmscan_lru_shrink_inactive() in evict_folios() at the same time to fix build error.

The reason v3 was NAK'ed was not mentioned or fixed in v4.

So NAK again.