Re: Conditions for FOLL_LONGTERM mapping in fsdax

To: Usama Arif <usama.arif@xxxxxxxxxxxxx>
Subject: Re: Conditions for FOLL_LONGTERM mapping in fsdax
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Mon, 20 Nov 2023 20:46:01 -0800
Cc: dan.j.williams@xxxxxxxxx, vishal.l.verma@xxxxxxxxx, dave.jiang@xxxxxxxxx, nvdimm@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, Fam Zheng <fam.zheng@xxxxxxxxxxxxx>, "liangma@xxxxxxxxxxxx" <liangma@xxxxxxxxxxxx>
In-reply-to: <a0d67f2d-f66b-8873-7c11-31d90aae8e8c@bytedance.com>
References: <172ab047-0dc7-1704-5f30-ec7cd3632e09@bytedance.com> <454dbfa1-2120-1e40-2582-d661203decca@bytedance.com> <a0d67f2d-f66b-8873-7c11-31d90aae8e8c@bytedance.com>

We don't have any way to recall the LONGTERM mappings, so we can't
support them on DAX for now.

Follow-Ups:
- Re: [External] Re: Conditions for FOLL_LONGTERM mapping in fsdax
  - From: Usama Arif

References:
- Conditions for FOLL_LONGTERM mapping in fsdax
  - From: Usama Arif
- Re: Conditions for FOLL_LONGTERM mapping in fsdax
  - From: Usama Arif