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| author | Yang Yang <yang.yang29@zte.com.cn> | 2022-08-05 03:38:39 +0000 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-09-26 19:46:06 -0700 |
| commit | f347c9d2697fcbbb64e077f7113a3887a181b8c0 (patch) | |
| tree | 186146188e3de04acb666ac1fe297c779688a492 /mm/filemap.c | |
| parent | 5154e607967d3f587fda84a40abbf900275016c9 (diff) | |
| download | lwn-f347c9d2697fcbbb64e077f7113a3887a181b8c0.tar.gz lwn-f347c9d2697fcbbb64e077f7113a3887a181b8c0.zip | |
filemap: make the accounting of thrashing more consistent
Once upon a time, we only support accounting thrashing of page cache.
Then Joonsoo introduced workingset detection for anonymous pages and we
gained the ability to account thrashing of them[1].
So let delayacct account both the thrashing of page cache and anonymous
pages, this could make the codes more consistent and simpler.
[1] commit aae466b0052e ("mm/swap: implement workingset detection for anonymous LRU")
Link: https://lkml.kernel.org/r/20220805033838.1714674-1-yang.yang29@zte.com.cn
Signed-off-by: Yang Yang <yang.yang29@zte.com.cn>
Signed-off-by: CGEL ZTE <cgel.zte@gmail.com>
Acked-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Balbir Singh <bsingharora@gmail.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Yang Yang <yang.yang29@zte.com.cn>
Cc: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/filemap.c')
| -rw-r--r-- | mm/filemap.c | 18 |
1 files changed, 4 insertions, 14 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index 8151890e9a00..5570d083ec0f 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1221,15 +1221,11 @@ static inline int folio_wait_bit_common(struct folio *folio, int bit_nr, struct wait_page_queue wait_page; wait_queue_entry_t *wait = &wait_page.wait; bool thrashing = false; - bool delayacct = false; unsigned long pflags; if (bit_nr == PG_locked && !folio_test_uptodate(folio) && folio_test_workingset(folio)) { - if (!folio_test_swapbacked(folio)) { - delayacct_thrashing_start(); - delayacct = true; - } + delayacct_thrashing_start(); psi_memstall_enter(&pflags); thrashing = true; } @@ -1329,8 +1325,7 @@ repeat: finish_wait(q, wait); if (thrashing) { - if (delayacct) - delayacct_thrashing_end(); + delayacct_thrashing_end(); psi_memstall_leave(&pflags); } @@ -1378,17 +1373,13 @@ void migration_entry_wait_on_locked(swp_entry_t entry, pte_t *ptep, struct wait_page_queue wait_page; wait_queue_entry_t *wait = &wait_page.wait; bool thrashing = false; - bool delayacct = false; unsigned long pflags; wait_queue_head_t *q; struct folio *folio = page_folio(pfn_swap_entry_to_page(entry)); q = folio_waitqueue(folio); if (!folio_test_uptodate(folio) && folio_test_workingset(folio)) { - if (!folio_test_swapbacked(folio)) { - delayacct_thrashing_start(); - delayacct = true; - } + delayacct_thrashing_start(); psi_memstall_enter(&pflags); thrashing = true; } @@ -1435,8 +1426,7 @@ void migration_entry_wait_on_locked(swp_entry_t entry, pte_t *ptep, finish_wait(q, wait); if (thrashing) { - if (delayacct) - delayacct_thrashing_end(); + delayacct_thrashing_end(); psi_memstall_leave(&pflags); } } |