mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-05 03:44:03 +08:00
mm, THP, swap: add THP swapping out fallback counting
When swapping out THP (Transparent Huge Page), instead of swapping out the THP as a whole, sometimes we have to fallback to split the THP into normal pages before swapping, because no free swap clusters are available, or cgroup limit is exceeded, etc. To count the number of the fallback, a new VM event THP_SWPOUT_FALLBACK is added, and counted when we fallback to split the THP. Link: http://lkml.kernel.org/r/20170724051840.2309-13-ying.huang@intel.com Signed-off-by: "Huang, Ying" <ying.huang@intel.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Hugh Dickins <hughd@google.com> Cc: Shaohua Li <shli@kernel.org> Cc: Rik van Riel <riel@redhat.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Ross Zwisler <ross.zwisler@intel.com> [for brd.c, zram_drv.c, pmem.c] Cc: Vishal L Verma <vishal.l.verma@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
parent
bd4c82c22c
commit
fe490cc0fe
@ -86,6 +86,7 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
|
|||||||
THP_ZERO_PAGE_ALLOC,
|
THP_ZERO_PAGE_ALLOC,
|
||||||
THP_ZERO_PAGE_ALLOC_FAILED,
|
THP_ZERO_PAGE_ALLOC_FAILED,
|
||||||
THP_SWPOUT,
|
THP_SWPOUT,
|
||||||
|
THP_SWPOUT_FALLBACK,
|
||||||
#endif
|
#endif
|
||||||
#ifdef CONFIG_MEMORY_BALLOON
|
#ifdef CONFIG_MEMORY_BALLOON
|
||||||
BALLOON_INFLATE,
|
BALLOON_INFLATE,
|
||||||
|
@ -1154,6 +1154,9 @@ static unsigned long shrink_page_list(struct list_head *page_list,
|
|||||||
if (split_huge_page_to_list(page,
|
if (split_huge_page_to_list(page,
|
||||||
page_list))
|
page_list))
|
||||||
goto activate_locked;
|
goto activate_locked;
|
||||||
|
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
|
||||||
|
count_vm_event(THP_SWPOUT_FALLBACK);
|
||||||
|
#endif
|
||||||
if (!add_to_swap(page))
|
if (!add_to_swap(page))
|
||||||
goto activate_locked;
|
goto activate_locked;
|
||||||
}
|
}
|
||||||
|
@ -1072,6 +1072,7 @@ const char * const vmstat_text[] = {
|
|||||||
"thp_zero_page_alloc",
|
"thp_zero_page_alloc",
|
||||||
"thp_zero_page_alloc_failed",
|
"thp_zero_page_alloc_failed",
|
||||||
"thp_swpout",
|
"thp_swpout",
|
||||||
|
"thp_swpout_fallback",
|
||||||
#endif
|
#endif
|
||||||
#ifdef CONFIG_MEMORY_BALLOON
|
#ifdef CONFIG_MEMORY_BALLOON
|
||||||
"balloon_inflate",
|
"balloon_inflate",
|
||||||
|
Loading…
Reference in New Issue
Block a user