lkml.org 
[lkml]   [2020]   [Jun]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 19/26] mm/sh: Use general page fault accounting
Date
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.

CC: Yoshinori Sato <ysato@users.sourceforge.jp>
CC: Rich Felker <dalias@libc.org>
CC: linux-sh@vger.kernel.org
Signed-off-by: Peter Xu <peterx@redhat.com>
---
arch/sh/mm/fault.c | 11 +----------
1 file changed, 1 insertion(+), 10 deletions(-)

diff --git a/arch/sh/mm/fault.c b/arch/sh/mm/fault.c
index a4e670a9c9b3..ba6f7ed570e5 100644
--- a/arch/sh/mm/fault.c
+++ b/arch/sh/mm/fault.c
@@ -464,22 +464,13 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs,
* 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 (unlikely(fault & (VM_FAULT_RETRY | VM_FAULT_ERROR)))
if (mm_fault_error(regs, error_code, address, fault))
return;

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) {
flags |= FAULT_FLAG_TRIED;

--
2.26.2
\
 
 \ /
  Last update: 2020-06-27 00:37    [W:0.196 / U:2.588 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site