From: Andy Lutomirski <luto@kernel.org>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>, X86 ML <x86@kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Borislav Petkov <bpetkov@suse.de>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mgorman@suse.de>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
Rik van Riel <riel@redhat.com>,
Dave Hansen <dave.hansen@intel.com>,
Nadav Amit <namit@vmware.com>, Michal Hocko <mhocko@suse.com>,
Arjan van de Ven <arjan@linux.intel.com>
Subject: Re: [RFC 09/10] x86/mm: Rework lazy TLB to track the actual loaded mm
Date: Tue, 9 May 2017 15:54:03 -0700 [thread overview]
Message-ID: <CALCETrV5ogB0qx4Mp0yYBSDvOPOCnKT-NjVa-0TwFurC2XSKpg@mail.gmail.com> (raw)
In-Reply-To: <alpine.DEB.2.20.1705092236290.2295@nanos>
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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next prev parent reply other threads:[~2017-05-09 22:54 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-07 12:38 [RFC 00/10] x86 TLB flush cleanups, moving toward PCID support Andy Lutomirski
2017-05-07 12:38 ` [RFC 01/10] x86/mm: Reimplement flush_tlb_page() using flush_tlb_mm_range() Andy Lutomirski
2017-05-11 17:41 ` Borislav Petkov
2017-05-12 3:35 ` Andy Lutomirski
2017-05-07 12:38 ` [RFC 02/10] x86/mm: Reduce indentation in flush_tlb_func() Andy Lutomirski
2017-05-07 12:38 ` [RFC 03/10] x86/mm: Make the batched unmap TLB flush API more generic Andy Lutomirski
2017-05-08 15:34 ` Dave Hansen
2017-05-09 13:02 ` Andy Lutomirski
2017-05-09 14:39 ` Mel Gorman
2017-05-09 17:13 ` Dave Hansen
2017-05-09 22:54 ` Andy Lutomirski
2017-05-07 12:38 ` [RFC 04/10] x86/mm: Pass flush_tlb_info to flush_tlb_others() etc Andy Lutomirski
2017-05-11 20:01 ` Nadav Amit
2017-05-12 3:41 ` Andy Lutomirski
2017-05-07 12:38 ` [RFC 05/10] x86/mm: Change the leave_mm() condition for local TLB flushes Andy Lutomirski
2017-05-07 12:38 ` [RFC 06/10] x86/mm: Refactor flush_tlb_mm_range() to merge local and remote cases Andy Lutomirski
2017-05-07 12:38 ` [RFC 07/10] x86/mm: Use new merged flush logic in arch_tlbbatch_flush() Andy Lutomirski
2017-05-07 12:38 ` [RFC 08/10] x86/mm: Remove the UP tlbflush code; always use the formerly SMP code Andy Lutomirski
2017-05-07 12:38 ` [RFC 09/10] x86/mm: Rework lazy TLB to track the actual loaded mm Andy Lutomirski
2017-05-09 20:41 ` Thomas Gleixner
2017-05-09 22:54 ` Andy Lutomirski [this message]
2017-05-10 5:57 ` Ingo Molnar
2017-05-10 8:19 ` Thomas Gleixner
2017-05-10 8:24 ` Ingo Molnar
2017-05-10 22:42 ` Andy Lutomirski
2017-05-11 7:13 ` Ingo Molnar
2017-05-12 3:36 ` Andy Lutomirski
2017-05-07 12:38 ` [RFC 10/10] x86,kvm: Teach KVM's VMX code that CR3 isn't a constant Andy Lutomirski
2017-05-07 13:00 ` [RFC 00/10] x86 TLB flush cleanups, moving toward PCID support Ingo Molnar
2017-05-07 16:05 ` Linus Torvalds
2017-05-08 16:36 ` Nadav Amit
2017-05-09 12:43 ` Andy Lutomirski
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