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| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2022-06-17 18:50:09 +0100 |
|---|---|---|
| committer | akpm <akpm@linux-foundation.org> | 2022-07-03 18:08:46 -0700 |
| commit | a2d33b5dd674c21e75ca47e3d791d070cba267dd (patch) | |
| tree | fd6625c5b6a660c28577ef0528903410b6c8bfbb /mm/swap.c | |
| parent | 4864545a4669781f75aa711ebf7b25e6f0f37d13 (diff) | |
| download | lwn-a2d33b5dd674c21e75ca47e3d791d070cba267dd.tar.gz lwn-a2d33b5dd674c21e75ca47e3d791d070cba267dd.zip | |
mm/swap: optimise lru_add_drain_cpu()
Do the per-cpu dereferencing of the fbatches once which saves 14 bytes
of text and several percpu relocations.
Link: https://lkml.kernel.org/r/20220617175020.717127-12-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/swap.c')
| -rw-r--r-- | mm/swap.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/mm/swap.c b/mm/swap.c index df78c4c4dbeb..84318692db6a 100644 --- a/mm/swap.c +++ b/mm/swap.c @@ -620,7 +620,8 @@ static void lru_lazyfree_fn(struct lruvec *lruvec, struct folio *folio) */ void lru_add_drain_cpu(int cpu) { - struct folio_batch *fbatch = &per_cpu(cpu_fbatches.lru_add, cpu); + struct cpu_fbatches *fbatches = &per_cpu(cpu_fbatches, cpu); + struct folio_batch *fbatch = &fbatches->lru_add; if (folio_batch_count(fbatch)) folio_batch_move_lru(fbatch, lru_add_fn); @@ -636,15 +637,15 @@ void lru_add_drain_cpu(int cpu) local_unlock_irqrestore(&lru_rotate.lock, flags); } - fbatch = &per_cpu(cpu_fbatches.lru_deactivate_file, cpu); + fbatch = &fbatches->lru_deactivate_file; if (folio_batch_count(fbatch)) folio_batch_move_lru(fbatch, lru_deactivate_file_fn); - fbatch = &per_cpu(cpu_fbatches.lru_deactivate, cpu); + fbatch = &fbatches->lru_deactivate; if (folio_batch_count(fbatch)) folio_batch_move_lru(fbatch, lru_deactivate_fn); - fbatch = &per_cpu(cpu_fbatches.lru_lazyfree, cpu); + fbatch = &fbatches->lru_lazyfree; if (folio_batch_count(fbatch)) folio_batch_move_lru(fbatch, lru_lazyfree_fn); |