Re: [PATCH] slub: avoid scanning all partial slabs in get_slabinfo()

To: Chengming Zhou <chengming.zhou@xxxxxxxxx>
Subject: Re: [PATCH] slub: avoid scanning all partial slabs in get_slabinfo()
From: "Christoph Lameter (Ampere)" <cl@xxxxxxxxx>
Date: Thu, 22 Feb 2024 19:02:58 -0800 (PST)
Cc: Vlastimil Babka <vbabka@xxxxxxx>, David Rientjes <rientjes@xxxxxxxxxx>, Jianfeng Wang <jianfeng.w.wang@xxxxxxxxxx>, penberg@xxxxxxxxxx, iamjoonsoo.kim@xxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, roman.gushchin@xxxxxxxxx, 42.hyeyoo@xxxxxxxxx, linux-mm@xxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, Chengming Zhou <zhouchengming@xxxxxxxxxxxxx>
In-reply-to: <55ccc92a-79fa-42d2-97d8-b514cf00823b@linux.dev>
References: <20240215211457.32172-1-jianfeng.w.wang@oracle.com> <6b58d81f-8e8f-3732-a5d4-40eece75013b@google.com> <fee76a21-fbc5-4ad8-b4bf-ba8a8e7cee8f@suse.cz> <55ccc92a-79fa-42d2-97d8-b514cf00823b@linux.dev>

On Thu, 22 Feb 2024, Chengming Zhou wrote:

Anyway, I put the code below for discussion...

Can we guestimate the free objects based on the number of partial slabs.That number is available.

How accurate need the accounting be? We also have fuzzy accounting in theVM counters.

Follow-Ups:
- Re: [PATCH] slub: avoid scanning all partial slabs in get_slabinfo()
  - From: Jianfeng Wang
- Re: [PATCH] slub: avoid scanning all partial slabs in get_slabinfo()
  - From: Chengming Zhou

References:
- [PATCH] slub: avoid scanning all partial slabs in get_slabinfo()
  - From: Jianfeng Wang
- Re: [PATCH] slub: avoid scanning all partial slabs in get_slabinfo()
  - From: David Rientjes
- Re: [PATCH] slub: avoid scanning all partial slabs in get_slabinfo()
  - From: Vlastimil Babka
- Re: [PATCH] slub: avoid scanning all partial slabs in get_slabinfo()
  - From: Chengming Zhou