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authorPeter Xu <peterx@redhat.com>2020-08-12 04:38:34 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-08-12 20:58:03 +0300
commit5ac365a458902214adfbe3567c94e114cc91cde6 (patch)
treee383403c4e44aedb575018d1f7e32f026b3de142 /arch/riscv
parent428fdc094492e720c342f1c934e7972cbc328d13 (diff)
downloadlinux-5ac365a458902214adfbe3567c94e114cc91cde6.tar.xz
mm/riscv: 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. Signed-off-by: Peter Xu <peterx@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Pekka Enberg <penberg@kernel.org> Acked-by: Palmer Dabbelt <palmerdabbelt@google.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Link: http://lkml.kernel.org/r/20200707225021.200906-18-peterx@redhat.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/riscv')
-rw-r--r--arch/riscv/mm/fault.c16
1 files changed, 1 insertions, 15 deletions
diff --git a/arch/riscv/mm/fault.c b/arch/riscv/mm/fault.c
index 30c1124d0fb6..716d64e36f83 100644
--- a/arch/riscv/mm/fault.c
+++ b/arch/riscv/mm/fault.c
@@ -109,7 +109,7 @@ good_area:
* make sure we exit gracefully rather than endlessly redo
* the fault.
*/
- fault = handle_mm_fault(vma, addr, flags, NULL);
+ fault = handle_mm_fault(vma, addr, flags, regs);
/*
* If we need to retry but a fatal signal is pending, handle the
@@ -127,21 +127,7 @@ good_area:
BUG();
}
- /*
- * 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, addr);
- } else {
- tsk->min_flt++;
- perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN,
- 1, regs, addr);
- }
if (fault & VM_FAULT_RETRY) {
flags |= FAULT_FLAG_TRIED;