From: akpm@linux-foundation.org
To: agordeev@linux.ibm.com, borntraeger@de.ibm.com,
gerald.schaefer@de.ibm.com, gor@linux.ibm.com,
heiko.carstens@de.ibm.com, mm-commits@vger.kernel.org,
peterx@redhat.com
Subject: [merged] mm-s390-use-general-page-fault-accounting.patch removed from -mm tree
Date: Wed, 12 Aug 2020 14:06:53 -0700 [thread overview]
Message-ID: <20200812210653.dlA6himA-%akpm@linux-foundation.org> (raw)
The patch titled
Subject: mm/s390: use general page fault accounting
has been removed from the -mm tree. Its filename was
mm-s390-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/s390: 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.
Link: http://lkml.kernel.org/r/20200707225021.200906-19-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
Acked-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
arch/s390/mm/fault.c | 16 +---------------
1 file changed, 1 insertion(+), 15 deletions(-)
--- a/arch/s390/mm/fault.c~mm-s390-use-general-page-fault-accounting
+++ a/arch/s390/mm/fault.c
@@ -476,7 +476,7 @@ retry:
* make sure we exit gracefully rather than endlessly redo
* the fault.
*/
- fault = handle_mm_fault(vma, address, flags, NULL);
+ fault = handle_mm_fault(vma, address, flags, regs);
if (fault_signal_pending(fault, regs)) {
fault = VM_FAULT_SIGNAL;
if (flags & FAULT_FLAG_RETRY_NOWAIT)
@@ -486,21 +486,7 @@ retry:
if (unlikely(fault & VM_FAULT_ERROR))
goto out_up;
- /*
- * Major/minor page fault accounting is only done on the
- * initial attempt. If we go through a retry, it is extremely
- * likely that the page will be found in page cache at that point.
- */
if (flags & FAULT_FLAG_ALLOW_RETRY) {
- if (fault & VM_FAULT_MAJOR) {
- tsk->maj_flt++;
- perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1,
- regs, address);
- } else {
- tsk->min_flt++;
- perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, 1,
- regs, address);
- }
if (fault & VM_FAULT_RETRY) {
if (IS_ENABLED(CONFIG_PGSTE) && gmap &&
(flags & FAULT_FLAG_RETRY_NOWAIT)) {
_
Patches currently in -mm which might be from peterx@redhat.com are
reply other threads:[~2020-08-12 21:06 UTC|newest]
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