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Re: [PATCH 1/2] block:hdev: support BLKSECDISCARD
From: |
Christoph Hellwig |
Subject: |
Re: [PATCH 1/2] block:hdev: support BLKSECDISCARD |
Date: |
Tue, 16 Nov 2021 21:53:39 -0800 |
On Tue, Nov 16, 2021 at 10:58:30AM +0000, Stefan Hajnoczi wrote:
> Question for Jens and Christoph:
>
> Is there a way for userspace to detect whether a Linux block device
> supports SECDISCARD?
I don't know of one.
> If not, then maybe a new sysfs attribute can be added:
This looks correct, but if we start looking into SECDISCARD seriously
I'd like to split the max_sectors settings for it from discard as that
is currently a bit of a mess. If we then expose the secure erase max
sectors in sysfs that would also be a good indicator.
What is the use case for exposing secure erase in qemu? The whole
concept for a LBA based secure erase is generally not a very smart
idea for flash based media..
- [PATCH 0/2] support BLKSECDISCARD, yadong . qi, 2021/11/15
- [PATCH 1/2] block:hdev: support BLKSECDISCARD, yadong . qi, 2021/11/15
- Re: [PATCH 1/2] block:hdev: support BLKSECDISCARD, Kevin Wolf, 2021/11/15
- Re: [PATCH 1/2] block:hdev: support BLKSECDISCARD, Stefan Hajnoczi, 2021/11/15
- RE: [PATCH 1/2] block:hdev: support BLKSECDISCARD, Qi, Yadong, 2021/11/15
- Re: [PATCH 1/2] block:hdev: support BLKSECDISCARD, Stefan Hajnoczi, 2021/11/16
- Re: [PATCH 1/2] block:hdev: support BLKSECDISCARD,
Christoph Hellwig <=
- Re: [PATCH 1/2] block:hdev: support BLKSECDISCARD, Stefan Hajnoczi, 2021/11/17
- RE: [PATCH 1/2] block:hdev: support BLKSECDISCARD, Qi, Yadong, 2021/11/17
[PATCH 2/2] virtio-blk: support BLKSECDISCARD, yadong . qi, 2021/11/15