From: Andy Lutomirski <luto@kernel.org> To: X86 ML <x86@kernel.org> Cc: "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>, Nadav Amit <nadav.amit@gmail.com>, Andy Lutomirski <luto@kernel.org>, Rik van Riel <riel@redhat.com>, Dave Hansen <dave.hansen@intel.com>, Nadav Amit <namit@vmware.com>, Michal Hocko <mhocko@suse.com> Subject: [PATCH v2 02/11] x86/mm: Reduce indentation in flush_tlb_func() Date: Mon, 22 May 2017 15:30:02 -0700 [thread overview] Message-ID: <97901ddcc9821d7bc7b296d2918d1179f08aaf22.1495492063.git.luto@kernel.org> (raw) In-Reply-To: <cover.1495492063.git.luto@kernel.org> In-Reply-To: <cover.1495492063.git.luto@kernel.org> The leave_mm() case can just exit the function early so we don't need to indent the entire remainder of the function. Cc: Rik van Riel <riel@redhat.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Nadav Amit <namit@vmware.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andy Lutomirski <luto@kernel.org> --- arch/x86/mm/tlb.c | 34 ++++++++++++++++++---------------- 1 file changed, 18 insertions(+), 16 deletions(-) diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c index fe6471132ea3..4d303864b310 100644 --- a/arch/x86/mm/tlb.c +++ b/arch/x86/mm/tlb.c @@ -237,24 +237,26 @@ static void flush_tlb_func(void *info) return; count_vm_tlb_event(NR_TLB_REMOTE_FLUSH_RECEIVED); - if (this_cpu_read(cpu_tlbstate.state) == TLBSTATE_OK) { - if (f->flush_end == TLB_FLUSH_ALL) { - local_flush_tlb(); - trace_tlb_flush(TLB_REMOTE_SHOOTDOWN, TLB_FLUSH_ALL); - } else { - unsigned long addr; - unsigned long nr_pages = - (f->flush_end - f->flush_start) / PAGE_SIZE; - addr = f->flush_start; - while (addr < f->flush_end) { - __flush_tlb_single(addr); - addr += PAGE_SIZE; - } - trace_tlb_flush(TLB_REMOTE_SHOOTDOWN, nr_pages); - } - } else + + if (this_cpu_read(cpu_tlbstate.state) != TLBSTATE_OK) { leave_mm(smp_processor_id()); + return; + } + if (f->flush_end == TLB_FLUSH_ALL) { + local_flush_tlb(); + trace_tlb_flush(TLB_REMOTE_SHOOTDOWN, TLB_FLUSH_ALL); + } else { + unsigned long addr; + unsigned long nr_pages = + (f->flush_end - f->flush_start) / PAGE_SIZE; + addr = f->flush_start; + while (addr < f->flush_end) { + __flush_tlb_single(addr); + addr += PAGE_SIZE; + } + trace_tlb_flush(TLB_REMOTE_SHOOTDOWN, nr_pages); + } } void native_flush_tlb_others(const struct cpumask *cpumask, -- 2.9.3
WARNING: multiple messages have this Message-ID (diff)
From: Andy Lutomirski <luto@kernel.org> To: X86 ML <x86@kernel.org> Cc: "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>, Nadav Amit <nadav.amit@gmail.com>, Andy Lutomirski <luto@kernel.org>, Rik van Riel <riel@redhat.com>, Dave Hansen <dave.hansen@intel.com>, Nadav Amit <namit@vmware.com>, Michal Hocko <mhocko@suse.com> Subject: [PATCH v2 02/11] x86/mm: Reduce indentation in flush_tlb_func() Date: Mon, 22 May 2017 15:30:02 -0700 [thread overview] Message-ID: <97901ddcc9821d7bc7b296d2918d1179f08aaf22.1495492063.git.luto@kernel.org> (raw) In-Reply-To: <cover.1495492063.git.luto@kernel.org> In-Reply-To: <cover.1495492063.git.luto@kernel.org> The leave_mm() case can just exit the function early so we don't need to indent the entire remainder of the function. Cc: Rik van Riel <riel@redhat.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Nadav Amit <namit@vmware.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andy Lutomirski <luto@kernel.org> --- arch/x86/mm/tlb.c | 34 ++++++++++++++++++---------------- 1 file changed, 18 insertions(+), 16 deletions(-) diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c index fe6471132ea3..4d303864b310 100644 --- a/arch/x86/mm/tlb.c +++ b/arch/x86/mm/tlb.c @@ -237,24 +237,26 @@ static void flush_tlb_func(void *info) return; count_vm_tlb_event(NR_TLB_REMOTE_FLUSH_RECEIVED); - if (this_cpu_read(cpu_tlbstate.state) == TLBSTATE_OK) { - if (f->flush_end == TLB_FLUSH_ALL) { - local_flush_tlb(); - trace_tlb_flush(TLB_REMOTE_SHOOTDOWN, TLB_FLUSH_ALL); - } else { - unsigned long addr; - unsigned long nr_pages = - (f->flush_end - f->flush_start) / PAGE_SIZE; - addr = f->flush_start; - while (addr < f->flush_end) { - __flush_tlb_single(addr); - addr += PAGE_SIZE; - } - trace_tlb_flush(TLB_REMOTE_SHOOTDOWN, nr_pages); - } - } else + + if (this_cpu_read(cpu_tlbstate.state) != TLBSTATE_OK) { leave_mm(smp_processor_id()); + return; + } + if (f->flush_end == TLB_FLUSH_ALL) { + local_flush_tlb(); + trace_tlb_flush(TLB_REMOTE_SHOOTDOWN, TLB_FLUSH_ALL); + } else { + unsigned long addr; + unsigned long nr_pages = + (f->flush_end - f->flush_start) / PAGE_SIZE; + addr = f->flush_start; + while (addr < f->flush_end) { + __flush_tlb_single(addr); + addr += PAGE_SIZE; + } + trace_tlb_flush(TLB_REMOTE_SHOOTDOWN, nr_pages); + } } void native_flush_tlb_others(const struct cpumask *cpumask, -- 2.9.3 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2017-05-22 22:30 UTC|newest] Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-05-22 22:30 [PATCH v2 00/11] x86 TLB flush cleanups, moving toward PCID support Andy Lutomirski 2017-05-22 22:30 ` Andy Lutomirski 2017-05-22 22:30 ` [PATCH v2 01/11] x86/mm: Reimplement flush_tlb_page() using flush_tlb_mm_range() Andy Lutomirski 2017-05-22 22:30 ` Andy Lutomirski 2017-05-24 10:21 ` [tip:x86/mm] " tip-bot for Andy Lutomirski 2017-05-22 22:30 ` Andy Lutomirski [this message] 2017-05-22 22:30 ` [PATCH v2 02/11] x86/mm: Reduce indentation in flush_tlb_func() Andy Lutomirski 2017-05-24 10:22 ` [tip:x86/mm] " tip-bot for Andy Lutomirski 2017-05-22 22:30 ` [PATCH v2 03/11] x86/mm: Make the batched unmap TLB flush API more generic Andy Lutomirski 2017-05-22 22:30 ` Andy Lutomirski 2017-05-24 10:22 ` [tip:x86/mm] mm, " tip-bot for Andy Lutomirski 2017-05-22 22:30 ` [PATCH v2 04/11] x86/mm: Pass flush_tlb_info to flush_tlb_others() etc Andy Lutomirski 2017-05-22 22:30 ` Andy Lutomirski 2017-05-24 8:18 ` Ingo Molnar 2017-05-24 8:18 ` Ingo Molnar 2017-05-22 22:30 ` [PATCH v2 05/11] x86/mm: Change the leave_mm() condition for local TLB flushes Andy Lutomirski 2017-05-22 22:30 ` Andy Lutomirski 2017-05-22 22:30 ` [PATCH v2 06/11] x86/mm: Refactor flush_tlb_mm_range() to merge local and remote cases Andy Lutomirski 2017-05-22 22:30 ` Andy Lutomirski 2017-05-22 22:30 ` [PATCH v2 07/11] x86/mm: Use new merged flush logic in arch_tlbbatch_flush() Andy Lutomirski 2017-05-22 22:30 ` Andy Lutomirski 2017-05-22 22:30 ` [PATCH v2 08/11] x86/mm: Remove the UP tlbflush code; always use the formerly SMP code Andy Lutomirski 2017-05-22 22:30 ` Andy Lutomirski 2017-05-22 22:30 ` [PATCH v2 09/11] x86/mm: Rework lazy TLB to track the actual loaded mm Andy Lutomirski 2017-05-22 22:30 ` Andy Lutomirski 2017-05-22 22:30 ` [PATCH v2 10/11] x86/mm: Be more consistent wrt PAGE_SHIFT vs PAGE_SIZE in tlb flush code Andy Lutomirski 2017-05-22 22:30 ` Andy Lutomirski 2017-05-22 23:24 ` Nadav Amit 2017-05-22 23:24 ` Nadav Amit 2017-05-22 23:41 ` Andy Lutomirski 2017-05-22 23:41 ` Andy Lutomirski 2017-05-22 22:30 ` [PATCH v2 11/11] x86,kvm: Teach KVM's VMX code that CR3 isn't a constant Andy Lutomirski 2017-05-22 22:30 ` Andy Lutomirski 2017-05-22 22:30 ` Andy Lutomirski
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