Re: [PATCH] [2/11] x86: Fix alternatives and kprobes to remap write-protected kernel text

* Jeremy Fitzhardinge ([email protected]) wrote:
> Mathieu Desnoyers wrote:
> > Hi Rusty,
> >
> > Good catch. I also still wonder why alternative (except alternative smp,
> > which is ok) and paravirt patching functions are not marked __init. I really
> > hope they are never used when NMI, MCE are enabled or when threads may
> > have been preempted in the site being patched, or it could result in an
> > illegal instruction.
> >   
> 
> We need to patch modules at load time.  Presumably an NMI/MCE handler
> will not depend on code in a being-loaded module.
> 
>     J
> 

Oh yes, I see. That's ok since the code of a being-loaded module is not
executed yet.

Thanks,

Mathieu

-- 
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

---

• References:
  • [PATCH] [0/11] Some more x86 patches for review
    • From: Andi Kleen <[email protected]>
  • [PATCH] [2/11] x86: Fix alternatives and kprobes to remap write-protected kernel text
    • From: Andi Kleen <[email protected]>
  • Re: [PATCH] [2/11] x86: Fix alternatives and kprobes to remap write-protected kernel text
    • From: Rusty Russell <[email protected]>
  • Re: [PATCH] [2/11] x86: Fix alternatives and kprobes to remap write-protected kernel text
    • From: Mathieu Desnoyers <[email protected]>
  • Re: [PATCH] [2/11] x86: Fix alternatives and kprobes to remap write-protected kernel text
    • From: Jeremy Fitzhardinge <[email protected]>

• Prev by Date: Re: [PATCH 0/2] Kexec jump: The first step to kexec base hibernation
• Next by Date: Re: Problems with timerfd()
• Previous by thread: Re: [PATCH] [2/11] x86: Fix alternatives and kprobes to remap write-protected kernel text
• Next by thread: [PATCH] [1/11] i386: Reserve the right performance counter for the Intel PerfMon NMI watchdog
• Index(es):
  • Date
  • Thread

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]