linux-kernel - Re: [PATCH] mm/slab: Add slabreclaim flag to slabinfo

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Date: Sun, 4 Feb 2024 05:09:18 -0800
From: Greg KH <gregkh@...uxfoundation.org>
To: Fangzheng Zhang <fangzheng.zhang@...soc.com>
Cc: Christoph Lameter <cl@...ux.com>, Pekka Enberg <penberg@...nel.org>,
	David Rientjes <rientjes@...gle.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Vlastimil Babka <vbabka@...e.cz>,
	Roman Gushchin <roman.gushchin@...ux.dev>,
	Hyeonggon Yoo <42.hyeyoo@...il.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Fangzheng Zhang <fangzheng.zhang1003@...il.com>,
	Yuming Han <yuming.han@...soc.com>,
	Chunyan Zhang <zhang.lyra@...il.com>
Subject: Re: [PATCH] mm/slab: Add slabreclaim flag to slabinfo

On Wed, Jan 31, 2024 at 05:44:42PM +0800, Fangzheng Zhang wrote:
> In order to enhance slab debugging, we add slabreclaim flag to
> slabinfo. Slab type is also an important analysis point in slabinfo
> for per slab, when various problems such as memory leaks or memory
> statistics occur.
> 
> Signed-off-by: Fangzheng Zhang <fangzheng.zhang@...soc.com>
> ---
>  mm/slab_common.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/mm/slab_common.c b/mm/slab_common.c
> index 238293b1dbe1..aeeb2bfe6dda 100644
> --- a/mm/slab_common.c
> +++ b/mm/slab_common.c
> @@ -1038,7 +1038,7 @@ static void print_slabinfo_header(struct seq_file *m)
>  	seq_puts(m, "slabinfo - version: 2.1\n");
>  	seq_puts(m, "# name            <active_objs> <num_objs> <objsize> <objperslab> <pagesperslab>");
>  	seq_puts(m, " : tunables <limit> <batchcount> <sharedfactor>");
> -	seq_puts(m, " : slabdata <active_slabs> <num_slabs> <sharedavail>");
> +	seq_puts(m, " : slabdata <active_slabs> <num_slabs> <sharedavail> <slabreclaim>");

Doesn't this change the slabinfo version number above?  Where is this
change documented so that userspace knows about it?

thanks,

greg k-h