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authorPeter Xu <peterx@redhat.com>2020-08-11 18:38:28 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-08-12 10:58:03 -0700
commitaf8a7926273645dc81f9e7f5c3e18136abebf05b (patch)
tree5a2c8315f89c5a0d873da6218800da3da9ad2b42 /arch
parent38caa902dccad61e02273c18a633fc5be91aeca5 (diff)
mm/parisc: use general page fault accounting
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(). Signed-off-by: Peter Xu <peterx@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: James E.J. Bottomley <James.Bottomley@HansenPartnership.com> Cc: Helge Deller <deller@gmx.de> Link: http://lkml.kernel.org/r/20200707225021.200906-16-peterx@redhat.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/parisc/mm/fault.c8
1 files changed, 3 insertions, 5 deletions
diff --git a/arch/parisc/mm/fault.c b/arch/parisc/mm/fault.c
index e32d06928c24..4bfe2da9fbe3 100644
--- a/arch/parisc/mm/fault.c
+++ b/arch/parisc/mm/fault.c
@@ -18,6 +18,7 @@
#include <linux/extable.h>
#include <linux/uaccess.h>
#include <linux/hugetlb.h>
+#include <linux/perf_event.h>
#include <asm/traps.h>
@@ -281,6 +282,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long code,
acc_type = parisc_acctyp(code, regs->iir);
if (acc_type & VM_WRITE)
flags |= FAULT_FLAG_WRITE;
+ perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address);
retry:
mmap_read_lock(mm);
vma = find_vma_prev(mm, address, &prev_vma);
@@ -302,7 +304,7 @@ good_area:
* fault.
*/
- fault = handle_mm_fault(vma, address, flags, NULL);
+ fault = handle_mm_fault(vma, address, flags, regs);
if (fault_signal_pending(fault, regs))
return;
@@ -323,10 +325,6 @@ good_area:
BUG();
}
if (flags & FAULT_FLAG_ALLOW_RETRY) {
- if (fault & VM_FAULT_MAJOR)
- current->maj_flt++;
- else
- current->min_flt++;
if (fault & VM_FAULT_RETRY) {
/*
* No need to mmap_read_unlock(mm) as we would