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Groups > linux.kernel > #1638432

Re: [RFC 09/10] x86/mm: Rework lazy TLB to track the actual loaded mm

From Andy Lutomirski <luto@kernel.org>
Newsgroups linux.kernel
Subject Re: [RFC 09/10] x86/mm: Rework lazy TLB to track the actual loaded mm
Date 2017-05-10 01:00 +0200
Message-ID <tFmgN-89w-7@gated-at.bofh.it> (permalink)
References <tECxj-3oj-5@gated-at.bofh.it> <tECxj-3oj-3@gated-at.bofh.it> <tFkeZ-6Un-3@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Tue, May 9, 2017 at 1:41 PM, Thomas Gleixner <tglx@linutronix.de> wrote:
> On Sun, 7 May 2017, Andy Lutomirski wrote:
>>  /* context.lock is held for us, so we don't need any locking. */
>>  static void flush_ldt(void *current_mm)
>>  {
>> +     struct mm_struct *mm = current_mm;
>>       mm_context_t *pc;
>>
>> -     if (current->active_mm != current_mm)
>> +     if (this_cpu_read(cpu_tlbstate.loaded_mm) != current_mm)
>
> While functional correct, this really should compare against 'mm'.
>

Fixed.

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Thread

[RFC 09/10] x86/mm: Rework lazy TLB to track the actual loaded mm Andy Lutomirski <luto@kernel.org> - 2017-05-08 00:10 +0200
  Re: [RFC 09/10] x86/mm: Rework lazy TLB to track the actual loaded  mm Thomas Gleixner <tglx@linutronix.de> - 2017-05-09 22:50 +0200
    Re: [RFC 09/10] x86/mm: Rework lazy TLB to track the actual loaded mm Andy Lutomirski <luto@kernel.org> - 2017-05-10 01:00 +0200
    Re: [RFC 09/10] x86/mm: Rework lazy TLB to track the actual loaded mm Ingo Molnar <mingo@kernel.org> - 2017-05-10 08:00 +0200
      Re: [RFC 09/10] x86/mm: Rework lazy TLB to track the actual loaded  mm Thomas Gleixner <tglx@linutronix.de> - 2017-05-10 10:20 +0200
        Re: [RFC 09/10] x86/mm: Rework lazy TLB to track the actual loaded mm Ingo Molnar <mingo@kernel.org> - 2017-05-10 10:30 +0200
          Re: [RFC 09/10] x86/mm: Rework lazy TLB to track the actual loaded mm Andy Lutomirski <luto@kernel.org> - 2017-05-11 00:50 +0200
            Re: [RFC 09/10] x86/mm: Rework lazy TLB to track the actual loaded mm Ingo Molnar <mingo@kernel.org> - 2017-05-11 09:20 +0200

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