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| author | Xianting Tian <tian.xianting@h3c.com> | 2020-10-13 16:54:42 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-10-13 18:38:32 -0700 |
| commit | c43bc03d0a872dcfcaaf1689c4f6140f9d3cb867 (patch) | |
| tree | fa6677e16c4c40e2564e6db9945a6d99b12302fb /mm | |
| parent | 41a04814a715ae561ac378587a8f7763f29beb4a (diff) | |
| download | linux-c43bc03d0a872dcfcaaf1689c4f6140f9d3cb867.tar.bz2 | |
mm/memory-failure: do pgoff calculation before for_each_process()
There is no need to calculate pgoff in each loop of for_each_process(), so
move it to the place before for_each_process(), which can save some CPU
cycles.
Signed-off-by: Xianting Tian <tian.xianting@h3c.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Link: http://lkml.kernel.org/r/20200818082647.34322-1-tian.xianting@h3c.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memory-failure.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c index a1e73943445e..24c28f80628d 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -484,11 +484,12 @@ static void collect_procs_file(struct page *page, struct list_head *to_kill, struct vm_area_struct *vma; struct task_struct *tsk; struct address_space *mapping = page->mapping; + pgoff_t pgoff; i_mmap_lock_read(mapping); read_lock(&tasklist_lock); + pgoff = page_to_pgoff(page); for_each_process(tsk) { - pgoff_t pgoff = page_to_pgoff(page); struct task_struct *t = task_early_kill(tsk, force_early); if (!t) |