Re: [PATCH bpf-next 3/7] mm: vmalloc: introduce vsize()

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Subject: Re: [PATCH bpf-next 3/7] mm: vmalloc: introduce vsize()
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Thu, 2 Feb 2023 02:23:53 -0800
Cc: ast@xxxxxxxxxx, daniel@xxxxxxxxxxxxx, andrii@xxxxxxxxxx, kafai@xxxxxx, songliubraving@xxxxxx, yhs@xxxxxx, john.fastabend@xxxxxxxxx, kpsingh@xxxxxxxxxx, sdf@xxxxxxxxxx, haoluo@xxxxxxxxxx, jolsa@xxxxxxxxxx, tj@xxxxxxxxxx, dennis@xxxxxxxxxx, cl@xxxxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, penberg@xxxxxxxxxx, rientjes@xxxxxxxxxx, iamjoonsoo.kim@xxxxxxx, roman.gushchin@xxxxxxxxx, 42.hyeyoo@xxxxxxxxx, vbabka@xxxxxxx, urezki@xxxxxxxxx, linux-mm@xxxxxxxxx, bpf@xxxxxxxxxxxxxxx, Christoph Hellwig <hch@xxxxxxxxxxxxx>
In-reply-to: <20230202014158.19616-4-laoar.shao@gmail.com>

On Thu, Feb 02, 2023 at 01:41:54AM +0000, Yafang Shao wrote:
> Introduce a helper to report full size of underlying allocation of a
> vmalloc'ed address.

What is the use case for it?

Follow-Ups:
- Re: [PATCH bpf-next 3/7] mm: vmalloc: introduce vsize()
  - From: Yafang Shao

References:
- [PATCH bpf-next 0/7] bpf, mm: bpf memory usage
  - From: Yafang Shao
- [PATCH bpf-next 3/7] mm: vmalloc: introduce vsize()
  - From: Yafang Shao

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