Kernel/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2025-01-04 04:06:26 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

mm/memory-failure: do pgoff calculation before for_each_process()

Browse Source 
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>
This commit is contained in:
Xianting Tian 2020-10-13 16:54:42 -07:00 committed by Linus Torvalds
parent 41a04814a7
commit c43bc03d0a
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
mm/memory-failure.c
View File

@ -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)