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mm/khugepaged: add missed tracepoint for collapse_huge_page_swapin 

One return case of `__collapse_huge_page_swapin()` does not invoke
tracepoint while every other return case does.  This commit adds a
tracepoint invocation for the case.

Link: http://lkml.kernel.org/r/20170507101813.30187-1-sj38.park@gmail.com
Signed-off-by: SeongJae Park <sj38.park@gmail.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
SeongJae Park 2017-05-12 15:46:38 -07:00 committed by Linus Torvalds
parent 0538421343
commit 835152a259
1 changed files with 3 additions and 1 deletions
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4
mm/khugepaged.c
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@ -907,8 +907,10 @@ static bool __collapse_huge_page_swapin(struct mm_struct *mm,
return false;
}
/* check if the pmd is still valid */
if (mm_find_pmd(mm, address) != pmd)
if (mm_find_pmd(mm, address) != pmd) {
trace_mm_collapse_huge_page_swapin(mm, swapped_in, referenced, 0);
return false;
}
}
if (ret & VM_FAULT_ERROR) {
trace_mm_collapse_huge_page_swapin(mm, swapped_in, referenced, 0);