# Re: \[PATCH RFC 0/3\] drivers/char: remove /dev/kmem for good

- From: Steven Rostedt \<rostedt@goodmis.org\>
- Date: 2021-03-22 15:19:37 
- List: linux-api
- Page: https://ratatoskr.run/linux-api/2021/03/6310815
- Thread: https://ratatoskr.run/linux-mm/2021/03/6307991/t.md

```text
On Mon, 22 Mar 2021 11:08:47 +0100
David Hildenbrand [ref] wrote:

> 
> Wonder if "echo c > /proc/sysrq-trigger" already existed and would have 
> worked back then. :)
> 
> 

Looks like sysrq-c was added in 2005:

commit 86b1ae38c0a62 ("kdump: sysrq trigger mechanism for kexec based crashdumps")

Thus the answer is "No, it would not have worked back then".

-- Steve
```