From: Peter Xu <peterx@redhat.com> To: linux-kernel@vger.kernel.org, linux-mm@kvack.org Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com>, Linus Torvalds <torvalds@linux-foundation.org>, peterx@redhat.com, Andrew Morton <akpm@linux-foundation.org>, Will Deacon <will@kernel.org>, Andrea Arcangeli <aarcange@redhat.com>, David Rientjes <rientjes@google.com>, John Hubbard <jhubbard@nvidia.com>, Michael Ellerman <mpe@ellerman.id.au>, Jonas Bonn <jonas@southpole.se>, Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>, Stafford Horne <shorne@gmail.com>, openrisc@lists.librecores.org Subject: [PATCH v5 14/25] mm/openrisc: Use general page fault accounting Date: Tue, 7 Jul 2020 18:50:10 -0400 [thread overview] Message-ID: <20200707225021.200906-15-peterx@redhat.com> (raw) In-Reply-To: <20200707225021.200906-1-peterx@redhat.com> Use the general page fault accounting by passing regs into handle_mm_fault(). It naturally solve the issue of multiple page fault accounting when page fault retry happened. Add the missing PERF_COUNT_SW_PAGE_FAULTS perf events too. Note, the other two perf events (PERF_COUNT_SW_PAGE_FAULTS_[MAJ|MIN]) were done in handle_mm_fault(). CC: Jonas Bonn <jonas@southpole.se> CC: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi> CC: Stafford Horne <shorne@gmail.com> CC: openrisc@lists.librecores.org Acked-by: Stafford Horne <shorne@gmail.com> Signed-off-by: Peter Xu <peterx@redhat.com> --- arch/openrisc/mm/fault.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/arch/openrisc/mm/fault.c b/arch/openrisc/mm/fault.c index 3daa491d1edb..ca97d9baab51 100644 --- a/arch/openrisc/mm/fault.c +++ b/arch/openrisc/mm/fault.c @@ -15,6 +15,7 @@ #include <linux/interrupt.h> #include <linux/extable.h> #include <linux/sched/signal.h> +#include <linux/perf_event.h> #include <linux/uaccess.h> #include <asm/siginfo.h> @@ -103,6 +104,8 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long address, if (in_interrupt() || !mm) goto no_context; + perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address); + retry: mmap_read_lock(mm); vma = find_vma(mm, address); @@ -159,7 +162,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long address, * the fault. */ - fault = handle_mm_fault(vma, address, flags, NULL); + fault = handle_mm_fault(vma, address, flags, regs); if (fault_signal_pending(fault, regs)) return; @@ -176,10 +179,6 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long address, if (flags & FAULT_FLAG_ALLOW_RETRY) { /*RGD modeled on Cris */ - if (fault & VM_FAULT_MAJOR) - tsk->maj_flt++; - else - tsk->min_flt++; if (fault & VM_FAULT_RETRY) { flags |= FAULT_FLAG_TRIED; -- 2.26.2
WARNING: multiple messages have this Message-ID (diff)
From: Peter Xu <peterx@redhat.com> To: openrisc@lists.librecores.org Subject: [OpenRISC] [PATCH v5 14/25] mm/openrisc: Use general page fault accounting Date: Tue, 07 Jul 2020 22:50:55 -0000 [thread overview] Message-ID: <20200707225021.200906-15-peterx@redhat.com> (raw) In-Reply-To: <20200707225021.200906-1-peterx@redhat.com> Use the general page fault accounting by passing regs into handle_mm_fault(). It naturally solve the issue of multiple page fault accounting when page fault retry happened. Add the missing PERF_COUNT_SW_PAGE_FAULTS perf events too. Note, the other two perf events (PERF_COUNT_SW_PAGE_FAULTS_[MAJ|MIN]) were done in handle_mm_fault(). CC: Jonas Bonn <jonas@southpole.se> CC: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi> CC: Stafford Horne <shorne@gmail.com> CC: openrisc at lists.librecores.org Acked-by: Stafford Horne <shorne@gmail.com> Signed-off-by: Peter Xu <peterx@redhat.com> --- arch/openrisc/mm/fault.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/arch/openrisc/mm/fault.c b/arch/openrisc/mm/fault.c index 3daa491d1edb..ca97d9baab51 100644 --- a/arch/openrisc/mm/fault.c +++ b/arch/openrisc/mm/fault.c @@ -15,6 +15,7 @@ #include <linux/interrupt.h> #include <linux/extable.h> #include <linux/sched/signal.h> +#include <linux/perf_event.h> #include <linux/uaccess.h> #include <asm/siginfo.h> @@ -103,6 +104,8 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long address, if (in_interrupt() || !mm) goto no_context; + perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address); + retry: mmap_read_lock(mm); vma = find_vma(mm, address); @@ -159,7 +162,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long address, * the fault. */ - fault = handle_mm_fault(vma, address, flags, NULL); + fault = handle_mm_fault(vma, address, flags, regs); if (fault_signal_pending(fault, regs)) return; @@ -176,10 +179,6 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long address, if (flags & FAULT_FLAG_ALLOW_RETRY) { /*RGD modeled on Cris */ - if (fault & VM_FAULT_MAJOR) - tsk->maj_flt++; - else - tsk->min_flt++; if (fault & VM_FAULT_RETRY) { flags |= FAULT_FLAG_TRIED; -- 2.26.2
next prev parent reply other threads:[~2020-07-07 22:51 UTC|newest] Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-07-07 22:49 [PATCH v5 00/25] mm: Page fault accounting cleanups Peter Xu 2020-07-07 22:49 ` [PATCH v5 01/25] mm: Do page fault accounting in handle_mm_fault Peter Xu 2020-07-07 22:49 ` [PATCH v5 02/25] mm/alpha: Use general page fault accounting Peter Xu 2020-07-07 22:49 ` [PATCH v5 03/25] mm/arc: " Peter Xu 2020-07-07 22:49 ` Peter Xu 2020-07-07 22:50 ` [PATCH v5 04/25] mm/arm: " Peter Xu 2020-07-07 22:50 ` Peter Xu 2020-07-07 22:50 ` [PATCH v5 05/25] mm/arm64: " Peter Xu 2020-07-07 22:50 ` Peter Xu 2020-07-07 22:50 ` [PATCH v5 06/25] mm/csky: " Peter Xu 2020-07-07 22:50 ` [PATCH v5 07/25] mm/hexagon: " Peter Xu 2020-07-07 22:50 ` [PATCH v5 08/25] mm/ia64: " Peter Xu 2020-07-07 22:50 ` [PATCH v5 09/25] mm/m68k: " Peter Xu 2020-07-07 22:50 ` [PATCH v5 10/25] mm/microblaze: " Peter Xu 2020-07-07 22:50 ` [PATCH v5 11/25] mm/mips: " Peter Xu 2020-07-07 22:50 ` [PATCH v5 12/25] mm/nds32: " Peter Xu 2020-07-07 22:50 ` [PATCH v5 13/25] mm/nios2: " Peter Xu 2020-07-07 22:50 ` Peter Xu [this message] 2020-07-07 22:50 ` [OpenRISC] [PATCH v5 14/25] mm/openrisc: " Peter Xu 2020-07-07 22:50 ` [PATCH v5 15/25] mm/parisc: " Peter Xu 2020-07-07 22:50 ` [PATCH v5 16/25] mm/powerpc: " Peter Xu 2020-07-07 22:50 ` Peter Xu 2020-07-07 22:50 ` [PATCH v5 17/25] mm/riscv: " Peter Xu 2020-07-07 22:50 ` Peter Xu 2020-07-07 22:50 ` [PATCH v5 18/25] mm/s390: " Peter Xu 2020-07-08 5:49 ` Alexander Gordeev 2020-07-08 14:30 ` Peter Xu 2020-07-07 22:50 ` [PATCH v5 19/25] mm/sh: " Peter Xu 2020-07-07 22:50 ` Peter Xu 2020-07-07 22:50 ` [PATCH v5 20/25] mm/sparc32: " Peter Xu 2020-07-07 22:50 ` Peter Xu 2020-07-07 22:50 ` [PATCH v5 21/25] mm/sparc64: " Peter Xu 2020-07-07 22:50 ` Peter Xu 2020-07-07 22:50 ` [PATCH v5 22/25] mm/x86: " Peter Xu 2020-07-07 22:50 ` [PATCH v5 23/25] mm/xtensa: " Peter Xu 2020-07-07 22:50 ` [PATCH v5 24/25] mm: Clean up the last pieces of page fault accountings Peter Xu 2020-07-07 22:50 ` [PATCH v5 25/25] mm/gup: Remove task_struct pointer for all gup code Peter Xu
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