* [merged] mm-parisc-use-general-page-fault-accounting.patch removed from -mm tree
@ 2020-08-12 21:06 akpm
0 siblings, 0 replies; only message in thread
From: akpm @ 2020-08-12 21:06 UTC (permalink / raw)
To: deller, James.Bottomley, mm-commits, peterx
The patch titled
Subject: mm/parisc: use general page fault accounting
has been removed from the -mm tree. Its filename was
mm-parisc-use-general-page-fault-accounting.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Peter Xu <peterx@redhat.com>
Subject: 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().
Link: http://lkml.kernel.org/r/20200707225021.200906-16-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
Cc: James E.J. Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Helge Deller <deller@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
arch/parisc/mm/fault.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
--- a/arch/parisc/mm/fault.c~mm-parisc-use-general-page-fault-accounting
+++ a/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,
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
_
Patches currently in -mm which might be from peterx@redhat.com are
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2020-08-12 21:06 [merged] mm-parisc-use-general-page-fault-accounting.patch removed from -mm tree akpm
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