lkml.org 
[lkml]   [2022]   [Oct]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC PATCH] text_poke/ftrace/x86: Allow text_poke() to be called in early boot
On Mon, 24 Oct 2022 18:02:32 -0700
Linus Torvalds <torvalds@linux-foundation.org> wrote:

> On Mon, Oct 24, 2022 at 5:21 PM Steven Rostedt <rostedt@goodmis.org> wrote:
> >
> > It's all about updating read only pages that are executable with a shadow mm.
>
> Right. And it doesn't actually need the mm at all, all it wants is the
> kernel page tables. Which is why all the "dup_mmap()" stuff seems so
> wrong.
>
> I suspect mm_alloc() does everything that VM actually needs.
>
> IOW, it shouldn't have used the fork() helper, it should have used the
> execve() helper that actually starts out from a clean slate. Because a
> clean slate is exactly what that code wants.
>
> No?
>

Something to look into. But I'm guessing that's best for the next merge
window, and not for the -rc releases?

-- Steve

\
 
 \ /
  Last update: 2022-10-25 03:32    [W:0.051 / U:0.540 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site