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mm/alpha: use general page fault accounting

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Use the general page fault accounting by passing regs into
handle_mm_fault().

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: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Link: http://lkml.kernel.org/r/20200707225021.200906-3-peterx@redhat.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Peter Xu
2020-08-11 18:37:49 -07:00
committed by Linus Torvalds
parent bce617edec
commit c0f6eda41f
1 changed files with 3 additions and 5 deletions
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8
arch/alpha/mm/fault.c
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@@ -25,6 +25,7 @@
#include <linux/interrupt.h> #include <linux/interrupt.h>
#include <linux/extable.h> #include <linux/extable.h>
#include <linux/uaccess.h> #include <linux/uaccess.h>
#include <linux/perf_event.h>
extern void die_if_kernel(char *,struct pt_regs *,long, unsigned long *); extern void die_if_kernel(char *,struct pt_regs *,long, unsigned long *);
@@ -116,6 +117,7 @@ do_page_fault(unsigned long address, unsigned long mmcsr,
#endif #endif
if (user_mode(regs)) if (user_mode(regs))
flags |= FAULT_FLAG_USER; flags |= FAULT_FLAG_USER;
perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address);
retry: retry:
mmap_read_lock(mm); mmap_read_lock(mm);
vma = find_vma(mm, address); vma = find_vma(mm, address);
@@ -148,7 +150,7 @@ retry:
/* If for any reason at all we couldn't handle the fault, /* If for any reason at all we couldn't handle the fault,
make sure we exit gracefully rather than endlessly redo make sure we exit gracefully rather than endlessly redo
the fault. */ the fault. */
fault = handle_mm_fault(vma, address, flags, NULL); fault = handle_mm_fault(vma, address, flags, regs);
if (fault_signal_pending(fault, regs)) if (fault_signal_pending(fault, regs))
return; return;
@@ -164,10 +166,6 @@ retry:
} }
if (flags & FAULT_FLAG_ALLOW_RETRY) { if (flags & FAULT_FLAG_ALLOW_RETRY) {
if (fault & VM_FAULT_MAJOR)
current->maj_flt++;
else
current->min_flt++;
if (fault & VM_FAULT_RETRY) { if (fault & VM_FAULT_RETRY) {
flags |= FAULT_FLAG_TRIED; flags |= FAULT_FLAG_TRIED;